SBN60, strontium-barium niobate at 100 K.

The title compound, Sr0.6Ba0.4Nb2O6 (strontium barium niobium oxide), belongs to the group of strontium-barium niobates with varying composition of Sr and Ba. Their general formula can be written as Sr x Ba1 - x Nb2O6. Below the Curie temperature, T c , these materials indicate ferroelectric properties. The Curie temperature for SBN60 is equal to 346±0.5 K so the structure is in the ferroelectric phase at the measurement temperature of 100 K. Characteristic for this family of compounds is the packing along the z-axis. The NbO6 corner-sharing octa-hedra surround three types of vacancy tunnels with penta-gonal, square and triangular shapes. The Sr(2+) ions partially occupy two unique sites, the first one located inside the penta-gon and the second one in the square tunnels. Consequently, they are situated on the mirror plane and the inter-section of two glide planes, respectively. The site inside the penta-gonal tunnel is additionally disordered so that the same position is shared by Ba(2+) and Sr(2+) ions whereas another part of the Ba(2+) ion occupies a different position (relative occupancies 0.43:0.41:0.16). One of the Nb(V) atoms and three of the O(2-) ions occupy general positions. The second Nb(V) atom is located on the inter-section of the mirror planes. Two remaining O(2-) ions are located on the same mirror plane. Only the Nb(V) atom and one of the O(2-) ions which is located on the mirror plane are not disordered. Each of the remaining O(2-) ions is split between two sites, with relative occupancies of 0.52:0.48 (O(2-) ions in general positions) and 0.64:0.36 (O(2-) ion on the mirror plane).

Related literature

For detailed information about the growth of the crystals, see: Lukasiewicz et al. (2008 ▶). For their physical properties and possible applications in photorefractive, pyroelectric and electro-optic devices, see: Neurgaonkar et al. (1988 ▶); Chernaya et al. (2003 ▶); Megumi et al. (1976 ▶). For SBN61 crystals, a modulation in the structure was reported, see: Schefer et al. (2008 ▶); Woike et al. (2003 ▶). The structure of SBN61 has been determined from single crystal X-ray data; the structures of three other analogues (x = 34, 48, 82), with no disorder present, and the influence of temperature on their unit-cell parameters has been investigated with use of the powder data, see: Podlozhenov et al. (2006 ▶).

Experimental

Crystal data

Sr0.6Ba0.4Nb2O6

M = 389.33

Tetragonal,

a = 12.43478 (12) Å

c = 3.93697 (6) Å

V = 608.75 (1) Å3

Z = 5

Mo Kα radiation

μ = 14.32 mm−1

T = 100 K

0.06 (radius) mm

Data collection

Agilent Xcalibur Opal diffractometer

Absorption correction: for a sphere (CrysAlis PRO; Agilent, 2012 ▶) T min = 0.278, T max = 0.278

31766 measured reflections

2265 independent reflections

2204 reflections with I > 2σ(I)

R int = 0.030

Refinement

R[F 2 > 2σ(F 2)] = 0.027

wR(F 2) = 0.074

S = 1.16

2265 reflections

82 parameters

15 restraints

Δρmax = 2.15 e Å−3

Δρmin = −1.96 e Å−3

Absolute structure: Flack parameter determined using 942 quotients [(I+)−(I−)]/[(I+)+(I−)] (Parsons & Flack, 2004 ▶)

Absolute structure parameter: 0.07 (7)

Data collection: CrysAlis PRO (Agilent, 2012 ▶); cell refinement: CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ▶); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 ▶); molecular graphics: DIAMOND (Brandenburg & Putz, 1999 ▶); software used to prepare material for publication: OLEX2 (Dolomanov et al., 2009 ▶).

Crystal structure: contains datablock(s) I, global. DOI: 10.1107/S1600536813025142/ff2110sup1.cif

Structure factors: contains datablock(s) I. DOI: 10.1107/S1600536813025142/ff2110Isup2.hkl

Additional supplementary materials: crystallographic information; 3D view; checkCIF report

Sr0.6Ba0.4Nb2O6	Dx = 5.310 Mg m−3
Mr = 389.33	Mo Kα radiation, λ = 0.71073 Å
Tetragonal, P4bm	Cell parameters from 16657 reflections
a = 12.43478 (12) Å	θ = 3.3–42.2°
c = 3.93697 (6) Å	µ = 14.32 mm−1
V = 608.75 (1) Å3	T = 100 K
Z = 5	Sphere, colourless
F(000) = 876	0.12 × 0.12 × 0.12 × 0.06 (radius) mm

Agilent Xcalibur Opal diffractometer	2265 independent reflections
Radiation source: fine-focus sealed tube	2204 reflections with I > 2σ(I)
Graphite monochromator	Rint = 0.030
Detector resolution: 8.4441 pixels mm-1	θmax = 42.3°, θmin = 3.3°
ω scans	h = −23→23
Absorption correction: for a sphere (CrysAlis PRO; Agilent, 2012)	k = −23→23
Tmin = 0.278, Tmax = 0.278	l = −7→7
31766 measured reflections

Refinement on F2	Secondary atom site location: difference Fourier map
Least-squares matrix: full	w = 1/[σ2(Fo2) + (0.0417P)2 + 1.9722P] where P = (Fo2 + 2Fc2)/3
R[F2 > 2σ(F2)] = 0.027	(Δ/σ)max = 0.001
wR(F2) = 0.074	Δρmax = 2.15 e Å−3
S = 1.16	Δρmin = −1.96 e Å−3
2265 reflections	Extinction correction: SHELXL, Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4
82 parameters	Extinction coefficient: 0.0340 (11)
15 restraints	Absolute structure: Flack parameter determined using 942 quotients [(I+)-(I-)]/[(I+)+(I-)] (Parsons & Flack, 2004)
Primary atom site location: structure-invariant direct methods	Absolute structure parameter: 0.07 (7)

Experimental. Empirical absorption correction using spherical harmonics, implemented in SCALE3 ABSPACK scaling algorithm.

Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes.

Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger.

	x	y	z	Uiso*/Ueq	Occ. (<1)
Ba1	0.82718 (6)	0.32718 (6)	0.5075 (5)	0.01003 (15)	0.36
Ba1B	0.8140 (6)	0.3543 (3)	0.507 (2)	0.0104 (7)	0.07
Nb1	0.574560 (15)	0.288626 (15)	0.00050 (15)	0.00455 (6)
Nb2	1.0000	0.5000	0.98772 (12)	0.00311 (7)
Sr1	0.82718 (6)	0.32718 (6)	0.5075 (5)	0.01003 (15)	0.38
Sr2	0.5000	0.5000	0.5120 (2)	0.00246 (9)	0.74
O1	0.7187 (2)	0.2187 (2)	0.0349 (15)	0.0144 (8)
O2A	0.6341 (5)	0.4334 (4)	−0.0139 (19)	0.0081 (6)	0.48
O2B	0.6437 (5)	0.4286 (4)	0.0985 (14)	0.0081 (6)	0.52
O3A	0.4966 (5)	0.1552 (4)	0.1035 (15)	0.0085 (6)	0.48
O3B	0.4907 (3)	0.1577 (3)	−0.0208 (16)	0.0085 (6)	0.52
O4A	0.5510 (5)	0.2845 (4)	−0.4624 (11)	0.0121 (6)	0.48
O4B	0.5974 (4)	0.3066 (4)	−0.4656 (12)	0.0121 (6)	0.52
O5A	1.0000	0.5000	0.5179 (3)	0.027 (3)	0.36
O5B	0.9789 (8)	0.4789 (8)	0.5274 (7)	0.027 (3)	0.32

	U11	U22	U33	U12	U13	U23
Ba1	0.0104 (2)	0.0104 (2)	0.00932 (18)	−0.0083 (4)	0.0002 (3)	0.0002 (3)
Ba1B	0.0170 (18)	0.0070 (12)	0.0071 (9)	−0.0079 (15)	0.000 (2)	0.000 (2)
Nb1	0.00466 (8)	0.00369 (8)	0.00531 (8)	−0.00120 (5)	−0.00007 (12)	−0.00130 (12)
Nb2	0.00313 (9)	0.00313 (9)	0.00306 (14)	−0.00024 (9)	0.000	0.000
Sr1	0.0104 (2)	0.0104 (2)	0.00932 (18)	−0.0083 (4)	0.0002 (3)	0.0002 (3)
Sr2	0.00182 (11)	0.00182 (11)	0.0037 (2)	0.000	0.000	0.000
O1	0.0067 (6)	0.0067 (6)	0.030 (3)	0.0034 (7)	0.0001 (11)	0.0001 (11)
O2A	0.0107 (11)	0.0029 (8)	0.011 (2)	−0.0036 (7)	0.0031 (16)	−0.0024 (14)
O2B	0.0107 (11)	0.0029 (8)	0.011 (2)	−0.0036 (7)	0.0031 (16)	−0.0024 (14)
O3A	0.0079 (8)	0.0047 (7)	0.0130 (17)	−0.0039 (6)	0.0006 (14)	−0.0017 (15)
O3B	0.0079 (8)	0.0047 (7)	0.0130 (17)	−0.0039 (6)	0.0006 (14)	−0.0017 (15)
O4A	0.0233 (16)	0.0104 (12)	0.0026 (14)	−0.0029 (10)	0.0000 (13)	0.0016 (10)
O4B	0.0233 (16)	0.0104 (12)	0.0026 (14)	−0.0029 (10)	0.0000 (13)	0.0016 (10)
O5A	0.038 (5)	0.038 (5)	0.005 (3)	−0.026 (6)	0.000	0.000
O5B	0.038 (5)	0.038 (5)	0.005 (3)	−0.026 (6)	0.000	0.000

Ba1—Nb2	3.5792 (15)	Nb2—O5Ai	2.0872 (10)
Ba1—O1i	2.820 (5)	Nb2—O5A	1.8498 (10)
Ba1—O1	2.665 (5)	Nb2—O5Bxii	1.8496 (10)
Ba1—O2Aii	3.326 (6)	Nb2—O5B	1.8496 (10)
Ba1—O2Ai	3.326 (6)	Sr2—O2Ai	2.636 (7)
Ba1—O3Aiii	3.161 (6)	Sr2—O2Aiv	2.636 (7)
Ba1—O3Aiv	3.161 (6)	Sr2—O2Axiii	2.636 (7)
Ba1—O3Av	2.649 (6)	Sr2—O2Axiv	2.636 (7)
Ba1—O3Avi	2.649 (6)	Sr2—O2Bix	2.576 (6)
Ba1—O4Aiv	3.112 (6)	Sr2—O2Bxv	2.576 (6)
Ba1—O4Aiii	3.112 (6)	Sr2—O2B	2.576 (6)
Ba1—O5A	3.0395 (11)	Sr2—O2Bvi	2.576 (6)
Ba1B—Ba1Bvii	3.9370	Sr2—O4Bxiii	2.694 (5)
Ba1B—Ba1Bi	3.9370	Sr2—O4Bi	2.694 (5)
Ba1B—Ba1Bviii	0.709 (11)	Sr2—O4Biv	2.694 (5)
Ba1B—Nb1i	3.648 (8)	Sr2—O4Bxiv	2.694 (5)
Ba1B—Nb1	3.675 (8)	O1—Ba1vii	2.820 (5)
Ba1B—Nb1ii	3.997 (5)	O1—Ba1Bxvi	2.927 (9)
Ba1B—Nb1vi	3.620 (6)	O1—Ba1Bvii	2.927 (9)
Ba1B—Nb1iv	3.592 (6)	O1—Ba1Bviii	2.775 (8)
Ba1B—Nb2	3.495 (7)	O1—Nb1viii	1.9967 (12)
Ba1B—Nb2vii	3.579 (8)	O1—Sr1vii	2.820 (5)
Ba1B—O1	2.775 (8)	O2A—Ba1vii	3.326 (6)
Ba1B—O1i	2.927 (9)	O2A—Nb1vi	2.002 (5)
Nb1—Sr2vii	3.3862 (6)	O2A—Sr2vii	2.636 (7)
Nb1—O1	1.9966 (12)	O2B—Nb1vi	2.038 (5)
Nb1—O2Aix	2.002 (5)	O2B—Sr2vii	3.052 (5)
Nb1—O2A	1.948 (5)	O3A—Ba1xvii	3.161 (6)
Nb1—O2Bix	2.038 (5)	O3A—Ba1ix	2.649 (6)
Nb1—O2B	1.979 (5)	O3A—Nb2xviii	1.983 (5)
Nb1—O3A	1.964 (5)	O3B—Nb2xviii	1.965 (4)
Nb1—O3B	1.935 (4)	O3B—Sr1ix	2.915 (5)
Nb1—O4A	1.846 (5)	O3B—Sr1xvii	2.760 (6)
Nb1—O4Ai	2.135 (4)	O4A—Ba1xvii	3.112 (6)
Nb1—O4B	1.870 (5)	O4A—Nb1vii	2.135 (4)
Nb1—O4Bi	2.133 (4)	O4A—Sr2vii	2.755 (5)
Nb2—O3Ax	1.983 (5)	O4B—Nb1vii	2.133 (4)
Nb2—O3Axi	1.983 (5)	O4B—Sr1vii	2.870 (6)
Nb2—O3Aiii	1.983 (5)	O4B—Sr2vii	2.694 (5)
Nb2—O3Aiv	1.983 (5)	O5A—Ba1xii	3.0395 (11)
Nb2—O3Biii	1.965 (4)	O5A—Nb2vii	2.0871 (10)
Nb2—O3Biv	1.965 (4)	O5B—Nb2vii	2.157 (5)
Nb2—O3Bxi	1.965 (4)	O5B—O5Bxii	0.74 (3)
Nb2—O3Bx	1.965 (4)
O1i—Ba1—Nb2	100.70 (12)	O3Ax—Nb2—O3Aiii	89.4 (3)
O1—Ba1—Nb2	167.60 (13)	O3Ax—Nb2—O5Ai	76.71 (17)
O1—Ba1—O1i	91.70 (11)	O3Aiii—Nb2—O5Ai	76.71 (17)
O1—Ba1—O2Ai	103.37 (12)	O3Aiv—Nb2—O5Ai	76.71 (17)
O1i—Ba1—O2Ai	55.08 (11)	O3Axi—Nb2—O5Ai	76.71 (17)
O1—Ba1—O2Aii	103.37 (12)	O3Bxi—Nb2—O3Ax	85.71 (16)
O1i—Ba1—O2Aii	55.08 (11)	O3Bx—Nb2—O3Ax	14.4 (2)
O1i—Ba1—O3Aiii	78.78 (15)	O3Biv—Nb2—O3Ax	167.5 (3)
O1—Ba1—O3Aiii	152.97 (11)	O3Biii—Nb2—O3Ax	94.74 (16)
O1—Ba1—O3Aiv	152.97 (11)	O3Bx—Nb2—O3Axi	85.71 (16)
O1i—Ba1—O3Aiv	78.78 (15)	O3Biv—Nb2—O3Axi	94.74 (16)
O1i—Ba1—O4Aiv	100.74 (10)	O3Biii—Nb2—O3Axi	167.5 (3)
O1—Ba1—O4Aiv	104.68 (10)	O3Bxi—Nb2—O3Axi	14.4 (2)
O1i—Ba1—O4Aiii	100.74 (10)	O3Biii—Nb2—O3Aiv	85.71 (16)
O1—Ba1—O4Aiii	104.68 (10)	O3Bxi—Nb2—O3Aiv	94.74 (16)
O1—Ba1—O5A	136.48 (14)	O3Bx—Nb2—O3Aiv	167.5 (3)
O1i—Ba1—O5A	131.81 (13)	O3Biv—Nb2—O3Aiv	14.4 (2)
O2Aii—Ba1—Nb2	84.01 (10)	O3Biii—Nb2—O3Aiii	14.4 (2)
O2Ai—Ba1—Nb2	84.01 (11)	O3Bxi—Nb2—O3Aiii	167.5 (3)
O2Aii—Ba1—O2Ai	104.6 (2)	O3Bx—Nb2—O3Aiii	94.74 (16)
O3Av—Ba1—Nb2	77.88 (13)	O3Biv—Nb2—O3Aiii	85.71 (16)
O3Aiii—Ba1—Nb2	33.50 (10)	O3Bx—Nb2—O3Biv	178.0 (4)
O3Avi—Ba1—Nb2	77.88 (13)	O3Bxi—Nb2—O3Biv	96.7 (2)
O3Aiv—Ba1—Nb2	33.50 (10)	O3Biii—Nb2—O3Biv	83.2 (3)
O3Avi—Ba1—O1i	149.58 (12)	O3Biii—Nb2—O3Bx	96.7 (2)
O3Av—Ba1—O1i	149.58 (11)	O3Bxi—Nb2—O3Bx	83.2 (3)
O3Avi—Ba1—O1	91.44 (17)	O3Biii—Nb2—O3Bxi	178.0 (4)
O3Av—Ba1—O1	91.44 (17)	O3Bx—Nb2—O5Ai	90.98 (18)
O3Av—Ba1—O2Ai	151.82 (14)	O3Biii—Nb2—O5Ai	90.98 (18)
O3Avi—Ba1—O2Ai	94.82 (16)	O3Biv—Nb2—O5Ai	90.98 (18)
O3Av—Ba1—O2Aii	94.82 (16)	O3Bxi—Nb2—O5Ai	90.98 (18)
O3Avi—Ba1—O2Aii	151.82 (15)	O5A—Nb2—O3Axi	103.29 (17)
O3Aiv—Ba1—O2Ai	50.56 (14)	O5A—Nb2—O3Ax	103.29 (17)
O3Aiii—Ba1—O2Ai	91.89 (17)	O5A—Nb2—O3Aiii	103.29 (17)
O3Aiii—Ba1—O2Aii	50.56 (14)	O5A—Nb2—O3Aiv	103.29 (17)
O3Aiv—Ba1—O2Aii	91.89 (17)	O5A—Nb2—O3Bxi	89.02 (18)
O3Av—Ba1—O3Avi	60.5 (2)	O5A—Nb2—O3Bx	89.02 (18)
O3Av—Ba1—O3Aiv	109.6 (2)	O5A—Nb2—O3Biv	89.02 (18)
O3Avi—Ba1—O3Aiii	109.6 (2)	O5A—Nb2—O3Biii	89.02 (18)
O3Av—Ba1—O3Aiii	84.84 (16)	O5A—Nb2—O5Ai	180.000 (1)
O3Avi—Ba1—O3Aiv	84.84 (16)	O5B—Nb2—O3Ax	111.5 (4)
O3Aiii—Ba1—O3Aiv	49.95 (19)	O5Bxii—Nb2—O3Ax	94.8 (4)
O3Avi—Ba1—O4Aiii	107.68 (15)	O5B—Nb2—O3Axi	111.5 (4)
O3Avi—Ba1—O4Aiv	49.36 (15)	O5Bxii—Nb2—O3Axi	94.8 (4)
O3Av—Ba1—O4Aiv	107.68 (15)	O5Bxii—Nb2—O3Aiii	111.5 (4)
O3Av—Ba1—O4Aiii	49.36 (15)	O5Bxii—Nb2—O3Aiv	111.5 (4)
O3Av—Ba1—O5A	52.21 (13)	O5B—Nb2—O3Aiv	94.8 (4)
O3Avi—Ba1—O5A	52.21 (13)	O5B—Nb2—O3Aiii	94.8 (4)
O4Aiii—Ba1—Nb2	73.20 (10)	O5Bxii—Nb2—O3Biii	97.6 (4)
O4Aiv—Ba1—Nb2	73.20 (10)	O5B—Nb2—O3Biii	80.4 (4)
O4Aiv—Ba1—O2Ai	45.66 (14)	O5Bxii—Nb2—O3Bx	80.4 (4)
O4Aiv—Ba1—O2Aii	143.25 (16)	O5B—Nb2—O3Bx	97.6 (4)
O4Aiii—Ba1—O2Aii	45.66 (14)	O5Bxii—Nb2—O3Biv	97.6 (4)
O4Aiii—Ba1—O2Ai	143.25 (16)	O5B—Nb2—O3Biv	80.4 (4)
O4Aiii—Ba1—O3Aiv	101.95 (14)	O5Bxii—Nb2—O3Bxi	80.4 (4)
O4Aiv—Ba1—O3Aiii	101.95 (14)	O5B—Nb2—O3Bxi	97.6 (4)
O4Aiii—Ba1—O3Aiii	53.62 (13)	O5Bxii—Nb2—O5A	11.6 (4)
O4Aiv—Ba1—O3Aiv	53.62 (13)	O5B—Nb2—O5A	11.6 (4)
O4Aiii—Ba1—O4Aiv	142.8 (2)	O5B—Nb2—O5Ai	168.4 (4)
O5A—Ba1—Nb2	31.12 (2)	O5Bxii—Nb2—O5Ai	168.4 (4)
O5A—Ba1—O2Aii	102.82 (9)	O5Bxii—Nb2—O5B	23.1 (9)
O5A—Ba1—O2Ai	102.82 (9)	O2Ai—Sr2—O2Axiv	59.91 (16)
O5A—Ba1—O3Aiii	57.98 (11)	O2Axiii—Sr2—O2Axiv	59.91 (16)
O5A—Ba1—O3Aiv	57.98 (11)	O2Aiv—Sr2—O2Ai	59.91 (16)
O5A—Ba1—O4Aiii	71.50 (10)	O2Aiv—Sr2—O2Axiv	89.8 (3)
O5A—Ba1—O4Aiv	71.50 (10)	O2Ai—Sr2—O2Axiii	89.8 (3)
Ba1Bviii—Ba1B—Ba1Bi	90.001 (1)	O2Aiv—Sr2—O2Axiii	59.91 (16)
Ba1Bviii—Ba1B—Ba1Bvii	90.0	O2Aiv—Sr2—O4Bi	113.59 (15)
Ba1Bi—Ba1B—Ba1Bvii	179.999 (3)	O2Aiv—Sr2—O4Biv	54.00 (15)
Ba1Bviii—Ba1B—Nb1	114.56 (7)	O2Ai—Sr2—O4Bi	54.00 (15)
Ba1Bviii—Ba1B—Nb1iv	142.21 (13)	O2Axiii—Sr2—O4Bi	122.79 (15)
Ba1Bviii—Ba1B—Nb1ii	55.97 (11)	O2Axiv—Sr2—O4Bi	63.48 (16)
Ba1Bviii—Ba1B—Nb1vi	141.65 (13)	O2Axiv—Sr2—O4Bxiv	54.00 (15)
Ba1Bviii—Ba1B—Nb1i	114.75 (7)	O2Axiv—Sr2—O4Bxiii	113.59 (15)
Ba1Bvii—Ba1B—Nb1ii	119.09 (12)	O2Axiii—Sr2—O4Bxiii	54.00 (15)
Ba1Bi—Ba1B—Nb1ii	60.91 (12)	O2Ai—Sr2—O4Bxiii	122.79 (15)
Ba1Bviii—Ba1B—Nb2	84.18 (9)	O2Aiv—Sr2—O4Bxiii	63.48 (16)
Ba1Bviii—Ba1B—Nb2vii	84.32 (8)	O2Axiii—Sr2—O4Bxiv	63.48 (16)
Ba1Bviii—Ba1B—O1i	83.04 (12)	O2Ai—Sr2—O4Biv	63.48 (16)
Ba1Bviii—Ba1B—O1	82.66 (13)	O2Axiii—Sr2—O4Biv	113.59 (15)
Nb1i—Ba1B—Ba1Bi	57.81 (13)	O2Axiv—Sr2—O4Biv	122.79 (16)
Nb1iv—Ba1B—Ba1Bi	57.25 (13)	O2Aiv—Sr2—O4Bxiv	122.79 (16)
Nb1vi—Ba1B—Ba1Bi	123.42 (13)	O2Ai—Sr2—O4Bxiv	113.59 (15)
Nb1—Ba1B—Ba1Bi	122.85 (14)	O2B—Sr2—O2Axiv	116.58 (18)
Nb1iv—Ba1B—Ba1Bvii	122.75 (13)	O2Bvi—Sr2—O2Axiv	174.1 (2)
Nb1i—Ba1B—Ba1Bvii	122.19 (13)	O2Bix—Sr2—O2Ai	116.61 (17)
Nb1—Ba1B—Ba1Bvii	57.15 (14)	O2Bxv—Sr2—O2Ai	174.1 (2)
Nb1vi—Ba1B—Ba1Bvii	56.58 (13)	O2Bvi—Sr2—O2Ai	116.58 (18)
Nb1vi—Ba1B—Nb1ii	154.0 (2)	O2B—Sr2—O2Aiv	116.61 (17)
Nb1vi—Ba1B—Nb1i	100.09 (17)	O2Bix—Sr2—O2Aiv	174.1 (2)
Nb1iv—Ba1B—Nb1	100.09 (17)	O2Bxv—Sr2—O2Aiv	116.58 (18)
Nb1—Ba1B—Nb1ii	90.37 (11)	O2Bvi—Sr2—O2Aiv	84.29 (16)
Nb1i—Ba1B—Nb1ii	58.79 (10)	O2B—Sr2—O2Axiii	174.1 (2)
Nb1i—Ba1B—Nb1	65.04 (12)	O2Bix—Sr2—O2Axiv	84.29 (16)
Nb1iv—Ba1B—Nb1vi	66.17 (7)	O2Bxv—Sr2—O2Axiv	116.61 (17)
Nb1vi—Ba1B—Nb1	65.41 (13)	O2Bvi—Sr2—O2Axiii	116.61 (17)
Nb1iv—Ba1B—Nb1ii	111.9 (2)	O2B—Sr2—O2Ai	84.29 (16)
Nb1iv—Ba1B—Nb1i	65.96 (14)	O2Bix—Sr2—O2Axiii	116.58 (18)
Nb2—Ba1B—Ba1Bi	57.21 (14)	O2Bxv—Sr2—O2Axiii	84.29 (16)
Nb2vii—Ba1B—Ba1Bvii	55.18 (13)	O2Bxv—Sr2—O2B	101.6 (2)
Nb2—Ba1B—Ba1Bvii	122.79 (14)	O2Bix—Sr2—O2B	66.44 (13)
Nb2vii—Ba1B—Ba1Bi	124.83 (13)	O2Bxv—Sr2—O2Bvi	66.44 (13)
Nb2—Ba1B—Nb1vi	98.01 (8)	O2Bix—Sr2—O2Bvi	101.6 (2)
Nb2vii—Ba1B—Nb1vi	61.99 (11)	O2Bix—Sr2—O2Bxv	66.44 (13)
Nb2—Ba1B—Nb1i	111.6 (2)	O2Bvi—Sr2—O2B	66.44 (13)
Nb2vii—Ba1B—Nb1iv	98.78 (8)	O2Bix—Sr2—O4Bi	63.67 (15)
Nb2vii—Ba1B—Nb1ii	140.28 (19)	O2Bxv—Sr2—O4Bi	129.83 (15)
Nb2—Ba1B—Nb1ii	103.9 (2)	O2Bvi—Sr2—O4Bi	119.00 (16)
Nb2—Ba1B—Nb1iv	63.06 (11)	O2B—Sr2—O4Bi	53.19 (16)
Nb2vii—Ba1B—Nb1i	160.91 (15)	O2B—Sr2—O4Bxiii	129.83 (15)
Nb2vii—Ba1B—Nb1	109.0 (2)	O2Bix—Sr2—O4Bxiv	53.19 (16)
Nb2—Ba1B—Nb1	160.94 (14)	O2Bxv—Sr2—O4Bxiv	63.67 (15)
Nb2—Ba1B—Nb2vii	67.62 (11)	O2Bvi—Sr2—O4Bxiv	129.83 (15)
O1i—Ba1B—Ba1Bi	44.76 (17)	O2B—Sr2—O4Biv	63.67 (15)
O1—Ba1B—Ba1Bi	132.0 (2)	O2Bix—Sr2—O4Biv	129.83 (15)
O1i—Ba1B—Ba1Bvii	135.24 (17)	O2Bxv—Sr2—O4Biv	119.00 (16)
O1—Ba1B—Ba1Bvii	48.0 (2)	O2Bvi—Sr2—O4Biv	53.19 (16)
O1i—Ba1B—Nb1iv	84.9 (2)	O2Bix—Sr2—O4Bxiii	119.00 (16)
O1—Ba1B—Nb1ii	76.29 (12)	O2Bxv—Sr2—O4Bxiii	53.19 (16)
O1i—Ba1B—Nb1ii	28.53 (5)	O2Bvi—Sr2—O4Bxiii	63.67 (15)
O1—Ba1B—Nb1iv	132.4 (2)	O2B—Sr2—O4Bxiv	119.00 (16)
O1i—Ba1B—Nb1vi	133.2 (2)	O4Bxiii—Sr2—O4Bi	176.3 (2)
O1i—Ba1B—Nb1i	33.11 (9)	O4Bxiv—Sr2—O4Bi	89.939 (7)
O1i—Ba1B—Nb1	85.94 (18)	O4Biv—Sr2—O4Bi	89.939 (8)
O1—Ba1B—Nb1i	82.66 (19)	O4Bxiv—Sr2—O4Bxiii	89.939 (7)
O1—Ba1B—Nb1	32.41 (9)	O4Biv—Sr2—O4Bxiii	89.939 (7)
O1—Ba1B—Nb1vi	86.6 (2)	O4Biv—Sr2—O4Bxiv	176.3 (2)
O1—Ba1B—Nb2	163.8 (3)	Ba1—O1—Ba1vii	91.70 (11)
O1i—Ba1B—Nb2	100.5 (3)	Ba1—O1—Ba1Bxvi	89.96 (19)
O1—Ba1B—Nb2vii	101.6 (3)	Ba1—O1—Ba1Bvii	89.96 (19)
O1i—Ba1B—Nb2vii	163.5 (3)	Ba1—O1—Sr1vii	91.70 (11)
O1—Ba1B—O1i	87.28 (17)	Ba1Bviii—O1—Ba1vii	89.9 (2)
O1—Nb1—Sr2vii	128.49 (14)	Ba1B—O1—Ba1vii	89.9 (2)
O1—Nb1—O2Aix	176.4 (2)	Ba1B—O1—Ba1Bxvi	89.1 (2)
O1—Nb1—O2Bix	165.2 (2)	Ba1Bviii—O1—Ba1Bxvi	87.28 (17)
O1—Nb1—O4Ai	92.6 (2)	Ba1B—O1—Ba1Bvii	87.28 (17)
O1—Nb1—O4Bi	81.9 (2)	Ba1Bviii—O1—Ba1Bvii	89.1 (2)
O2A—Nb1—Sr2vii	50.9 (2)	Ba1Bviii—O1—Sr1vii	89.9 (2)
O2Aix—Nb1—Sr2vii	51.0 (2)	Ba1B—O1—Sr1vii	89.9 (2)
O2A—Nb1—O1	93.65 (19)	Nb1viii—O1—Ba1	106.33 (15)
O2A—Nb1—O2Aix	83.6 (3)	Nb1—O1—Ba1vii	99.86 (16)
O2A—Nb1—O2B	13.5 (2)	Nb1viii—O1—Ba1vii	99.86 (16)
O2A—Nb1—O2Bix	87.83 (17)	Nb1—O1—Ba1	106.33 (15)
O2Aix—Nb1—O2Bix	13.1 (2)	Nb1viii—O1—Ba1Bvii	107.0 (2)
O2A—Nb1—O3A	167.1 (3)	Nb1—O1—Ba1Bvii	93.69 (19)
O2Aix—Nb1—O4Ai	85.4 (3)	Nb1—O1—Ba1B	99.43 (19)
O2A—Nb1—O4Ai	95.9 (3)	Nb1viii—O1—Ba1B	113.88 (19)
O2A—Nb1—O4Bi	83.2 (3)	Nb1viii—O1—Ba1Bviii	99.43 (19)
O2Aix—Nb1—O4Bi	95.4 (3)	Nb1—O1—Ba1Bviii	113.88 (19)
O2Bix—Nb1—Sr2vii	62.81 (15)	Nb1viii—O1—Ba1Bxvi	93.69 (19)
O2B—Nb1—Sr2vii	63.07 (16)	Nb1—O1—Ba1Bxvi	107.0 (2)
O2B—Nb1—O1	88.8 (2)	Nb1—O1—Nb1viii	141.0 (2)
O2B—Nb1—O2Aix	87.94 (17)	Nb1—O1—Sr1vii	99.86 (16)
O2B—Nb1—O2Bix	89.3 (4)	Nb1viii—O1—Sr1vii	99.86 (16)
O2B—Nb1—O4Ai	83.6 (2)	Nb1vi—O2A—Ba1vii	91.01 (19)
O2Bix—Nb1—O4Ai	72.6 (2)	Nb1—O2A—Ba1vii	85.61 (18)
O2Bix—Nb1—O4Bi	83.6 (2)	Nb1—O2A—Nb1vi	172.8 (4)
O2B—Nb1—O4Bi	70.0 (2)	Nb1vi—O2A—Sr2	90.3 (2)
O3A—Nb1—Sr2vii	129.63 (17)	Nb1—O2A—Sr2vii	94.1 (2)
O3A—Nb1—O1	93.5 (2)	Nb1vi—O2A—Sr2vii	92.8 (2)
O3A—Nb1—O2Aix	88.8 (2)	Nb1—O2A—Sr2	91.5 (2)
O3A—Nb1—O2Bix	82.5 (2)	Sr2—O2A—Ba1vii	166.3 (3)
O3A—Nb1—O2B	156.5 (2)	Sr2vii—O2A—Ba1vii	100.4 (2)
O3A—Nb1—O4Ai	73.0 (2)	Sr2vii—O2A—Sr2	93.13 (17)
O3A—Nb1—O4Bi	87.2 (2)	Nb1—O2B—Nb1vi	157.8 (3)
O3B—Nb1—Sr2vii	118.74 (17)	Nb1vi—O2B—Sr2vii	80.75 (16)
O3B—Nb1—O1	96.90 (17)	Nb1—O2B—Sr2vii	81.61 (17)
O3B—Nb1—O2Aix	86.0 (2)	Nb1vi—O2B—Sr2	95.7 (2)
O3B—Nb1—O2A	168.9 (2)	Nb1—O2B—Sr2	97.2 (2)
O3B—Nb1—O2Bix	82.9 (2)	Sr2—O2B—Sr2vii	88.37 (17)
O3B—Nb1—O2B	169.2 (2)	Ba1ix—O3A—Ba1xvii	84.84 (16)
O3B—Nb1—O3A	14.6 (2)	Nb1—O3A—Ba1xvii	96.7 (2)
O3B—Nb1—O4Ai	87.1 (2)	Nb1—O3A—Ba1ix	116.5 (3)
O3B—Nb1—O4Bi	101.7 (2)	Nb1—O3A—Nb2xviii	139.8 (3)
O4Ai—Nb1—Sr2vii	122.92 (14)	Nb2xviii—O3A—Ba1xvii	84.90 (18)
O4A—Nb1—Sr2vii	54.38 (16)	Nb2xviii—O3A—Ba1ix	103.6 (2)
O4A—Nb1—O1	101.4 (3)	Nb1—O3B—Nb2xviii	143.8 (3)
O4A—Nb1—O2A	93.3 (3)	Nb1—O3B—Sr1ix	106.9 (2)
O4A—Nb1—O2Aix	81.2 (3)	Nb1—O3B—Sr1xvii	111.6 (2)
O4A—Nb1—O2B	106.6 (2)	Nb2xviii—O3B—Sr1xvii	97.06 (18)
O4A—Nb1—O2Bix	93.3 (2)	Nb2xviii—O3B—Sr1ix	95.35 (18)
O4A—Nb1—O3A	95.9 (2)	Sr1xvii—O3B—Sr1ix	87.81 (12)
O4A—Nb1—O3B	81.3 (2)	Nb1—O4A—Ba1xvii	101.1 (2)
O4A—Nb1—O4Ai	162.7 (4)	Nb1vii—O4A—Ba1xvii	95.49 (19)
O4A—Nb1—O4B	19.8 (2)	Nb1—O4A—Nb1vii	162.7 (4)
O4A—Nb1—O4Bi	175.3 (2)	Nb1vii—O4A—Sr2vii	88.40 (16)
O4B—Nb1—Sr2vii	52.52 (15)	Nb1—O4A—Sr2vii	92.61 (19)
O4Bi—Nb1—Sr2vii	120.98 (13)	Sr2vii—O4A—Ba1xvii	103.11 (19)
O4B—Nb1—O1	89.0 (2)	Nb1—O4B—Nb1vii	159.1 (3)
O4B—Nb1—O2A	78.6 (3)	Nb1—O4B—Sr1vii	101.4 (2)
O4B—Nb1—O2Aix	92.7 (3)	Nb1vii—O4B—Sr1vii	96.07 (19)
O4B—Nb1—O2Bix	105.8 (2)	Nb1vii—O4B—Sr2vii	90.09 (16)
O4B—Nb1—O2B	91.1 (2)	Nb1—O4B—Sr2vii	94.05 (19)
O4B—Nb1—O3A	112.3 (2)	Sr2vii—O4B—Sr1vii	111.53 (17)
O4B—Nb1—O3B	98.1 (2)	Ba1—O5A—Ba1xii	178.46 (10)
O4Bi—Nb1—O4Ai	17.2 (2)	Nb2—O5A—Ba1xii	90.77 (5)
O4B—Nb1—O4Ai	174.4 (2)	Nb2vii—O5A—Ba1xii	89.23 (5)
O4B—Nb1—O4Bi	159.1 (3)	Nb2vii—O5A—Ba1	89.23 (5)
O3Axi—Nb2—O3Aiv	89.4 (3)	Nb2—O5A—Ba1	90.77 (5)
O3Aiii—Nb2—O3Aiv	84.6 (3)	Nb2—O5A—Nb2vii	180.0
O3Ax—Nb2—O3Aiv	153.4 (3)	Nb2—O5B—Nb2vii	158.6 (8)
O3Axi—Nb2—O3Ax	84.6 (3)	O5Bxii—O5B—Nb2vii	80.1 (4)
O3Axi—Nb2—O3Aiii	153.4 (3)	O5Bxii—O5B—Nb2	78.4 (4)
Ba1Bi—Ba1B—O1—Ba1	−69.4 (15)	O2Bvi—Sr2—O2A—Nb1	−155.5 (3)
Ba1Bvii—Ba1B—O1—Ba1	110.6 (15)	O2Bix—Sr2—O2A—Sr2vii	61.38 (19)
Ba1Bviii—Ba1B—O1—Ba1vii	−89.99 (3)	O2B—Sr2—O2A—Sr2vii	179.9 (12)
Ba1Bviii—Ba1B—O1—Ba1	14.0 (16)	O2Bvi—Sr2—O2A—Sr2vii	−61.40 (19)
Ba1Bvii—Ba1B—O1—Ba1vii	6.69 (12)	O2Bxv—Sr2—O2A—Sr2vii	−0.02 (19)
Ba1Bi—Ba1B—O1—Ba1vii	−173.32 (12)	O2Bix—Sr2—O2B—Nb1vi	138.24 (11)
Ba1Bviii—Ba1B—O1—Ba1Bvii	−96.67 (13)	O2Bxv—Sr2—O2B—Nb1vi	80.54 (17)
Ba1Bvii—Ba1B—O1—Ba1Bxvi	13.8 (2)	O2Bvi—Sr2—O2B—Nb1vi	22.8 (2)
Ba1Bi—Ba1B—O1—Ba1Bxvi	−166.2 (2)	O2Bvi—Sr2—O2B—Nb1	−139.03 (12)
Ba1Bviii—Ba1B—O1—Ba1Bxvi	−82.86 (11)	O2Bix—Sr2—O2B—Nb1	−23.6 (2)
Ba1Bi—Ba1B—O1—Ba1Bvii	180.0	O2Bxv—Sr2—O2B—Nb1	−81.33 (18)
Ba1Bi—Ba1B—O1—Ba1Bviii	−83.33 (13)	O2Bvi—Sr2—O2B—Sr2vii	−57.70 (7)
Ba1Bvii—Ba1B—O1—Ba1Bviii	96.67 (13)	O2Bxv—Sr2—O2B—Sr2vii	0.0
Ba1Bvii—Ba1B—O1—Nb1	−93.29 (19)	O2Bix—Sr2—O2B—Sr2vii	57.70 (7)
Ba1Bviii—Ba1B—O1—Nb1	170.04 (18)	O3Aiii—Ba1—O1—Ba1vii	−111.7 (3)
Ba1Bi—Ba1B—O1—Nb1	86.71 (19)	O3Aiv—Ba1—O1—Ba1vii	111.7 (3)
Ba1Bi—Ba1B—O1—Nb1viii	−72.6 (3)	O3Av—Ba1—O1—Ba1vii	−30.27 (11)
Ba1Bvii—Ba1B—O1—Nb1viii	107.4 (3)	O3Avi—Ba1—O1—Ba1vii	30.27 (11)
Ba1Bviii—Ba1B—O1—Nb1viii	10.75 (19)	O3Aiv—Ba1—O1—Ba1Bvii	104.8 (3)
Ba1Bvii—Ba1B—O1—Sr1vii	6.69 (12)	O3Avi—Ba1—O1—Ba1Bxvi	37.22 (17)
Ba1Bviii—Ba1B—O1—Sr1vii	−89.99 (3)	O3Aiv—Ba1—O1—Ba1Bxvi	118.7 (4)
Ba1Bi—Ba1B—O1—Sr1vii	−173.32 (12)	O3Aiii—Ba1—O1—Ba1Bxvi	−104.8 (3)
Nb1—Ba1B—O1—Ba1vii	99.97 (17)	O3Av—Ba1—O1—Ba1Bxvi	−23.31 (16)
Nb1—Ba1B—O1—Ba1	−156.1 (16)	O3Aiii—Ba1—O1—Ba1Bvii	−118.7 (4)
Nb1ii—Ba1B—O1—Ba1	−42.7 (15)	O3Avi—Ba1—O1—Ba1Bvii	23.31 (16)
Nb1i—Ba1B—O1—Ba1vii	153.76 (8)	O3Av—Ba1—O1—Ba1Bvii	−37.22 (17)
Nb1vi—Ba1B—O1—Ba1vii	53.13 (12)	O3Aiv—Ba1—O1—Ba1Bviii	−172.1 (17)
Nb1iv—Ba1B—O1—Ba1	−150.0 (19)	O3Aiii—Ba1—O1—Ba1Bviii	−35.6 (15)
Nb1iv—Ba1B—O1—Ba1vii	106.1 (3)	O3Avi—Ba1—O1—Ba1Bviii	106.4 (16)
Nb1ii—Ba1B—O1—Ba1vii	−146.66 (8)	O3Av—Ba1—O1—Ba1Bviii	45.9 (16)
Nb1vi—Ba1B—O1—Ba1	157.1 (17)	O3Aiv—Ba1—O1—Ba1B	35.6 (15)
Nb1i—Ba1B—O1—Ba1	−102.3 (16)	O3Aiii—Ba1—O1—Ba1B	172.1 (17)
Nb1ii—Ba1B—O1—Ba1Bvii	−153.35 (6)	O3Av—Ba1—O1—Ba1B	−106.4 (16)
Nb1vi—Ba1B—O1—Ba1Bviii	143.11 (10)	O3Avi—Ba1—O1—Ba1B	−45.9 (16)
Nb1iv—Ba1B—O1—Ba1Bviii	−163.9 (3)	O3Aiii—Ba1—O1—Nb1	147.5 (3)
Nb1vi—Ba1B—O1—Ba1Bvii	46.4 (2)	O3Aiv—Ba1—O1—Nb1	10.9 (5)
Nb1i—Ba1B—O1—Ba1Bvii	147.08 (9)	O3Avi—Ba1—O1—Nb1	−70.5 (2)
Nb1—Ba1B—O1—Ba1Bxvi	107.1 (2)	O3Av—Ba1—O1—Nb1	−131.1 (2)
Nb1vi—Ba1B—O1—Ba1Bxvi	60.25 (7)	O3Aiv—Ba1—O1—Nb1viii	−147.5 (3)
Nb1iv—Ba1B—O1—Ba1Bvii	99.4 (4)	O3Aiii—Ba1—O1—Nb1viii	−10.9 (5)
Nb1—Ba1B—O1—Ba1Bvii	93.29 (19)	O3Avi—Ba1—O1—Nb1viii	131.1 (2)
Nb1i—Ba1B—O1—Ba1Bxvi	160.89 (17)	O3Av—Ba1—O1—Nb1viii	70.5 (2)
Nb1ii—Ba1B—O1—Ba1Bviii	−56.68 (9)	O3Aiv—Ba1—O1—Sr1vii	111.7 (3)
Nb1iv—Ba1B—O1—Ba1Bxvi	113.2 (3)	O3Aiii—Ba1—O1—Sr1vii	−111.7 (3)
Nb1ii—Ba1B—O1—Ba1Bxvi	−139.54 (19)	O3Avi—Ba1—O1—Sr1vii	30.27 (11)
Nb1i—Ba1B—O1—Ba1Bviii	−116.25 (7)	O3Av—Ba1—O1—Sr1vii	−30.27 (11)
Nb1—Ba1B—O1—Ba1Bviii	−170.04 (18)	O3Aiii—Ba1—O5A—Nb2vii	150.14 (12)
Nb1ii—Ba1B—O1—Nb1viii	−45.9 (2)	O3Av—Ba1—O5A—Nb2	−140.39 (14)
Nb1iv—Ba1B—O1—Nb1viii	−153.2 (3)	O3Avi—Ba1—O5A—Nb2	140.39 (14)
Nb1iv—Ba1B—O1—Nb1	6.1 (4)	O3Aiv—Ba1—O5A—Nb2vii	−150.14 (12)
Nb1ii—Ba1B—O1—Nb1	113.36 (18)	O3Aiii—Ba1—O5A—Nb2	−29.86 (12)
Nb1i—Ba1B—O1—Nb1viii	−105.5 (2)	O3Avi—Ba1—O5A—Nb2vii	−39.61 (14)
Nb1—Ba1B—O1—Nb1viii	−159.3 (4)	O3Aiv—Ba1—O5A—Nb2	29.86 (12)
Nb1vi—Ba1B—O1—Nb1viii	153.9 (2)	O3Av—Ba1—O5A—Nb2vii	39.61 (14)
Nb1i—Ba1B—O1—Nb1	53.79 (18)	O3A—Nb1—O1—Ba1vii	142.7 (2)
Nb1vi—Ba1B—O1—Nb1	−46.8 (2)	O3A—Nb1—O1—Ba1	−122.6 (2)
Nb1i—Ba1B—O1—Sr1vii	153.76 (8)	O3A—Nb1—O1—Ba1Bviii	−123.0 (3)
Nb1—Ba1B—O1—Sr1vii	99.97 (17)	O3A—Nb1—O1—Ba1Bxvi	142.3 (3)
Nb1ii—Ba1B—O1—Sr1vii	−146.66 (8)	O3A—Nb1—O1—Ba1Bvii	146.4 (2)
Nb1iv—Ba1B—O1—Sr1vii	106.1 (3)	O3A—Nb1—O1—Ba1B	−125.8 (3)
Nb1vi—Ba1B—O1—Sr1vii	53.13 (12)	O3A—Nb1—O1—Nb1viii	23.3 (5)
Nb2—Ba1—O1—Ba1vii	0.0	O3A—Nb1—O1—Sr1vii	142.7 (2)
Nb2—Ba1—O1—Ba1Bvii	−6.96 (12)	O3A—Nb1—O2A—Ba1vii	162.1 (11)
Nb2—Ba1—O1—Ba1Bviii	76.2 (16)	O3A—Nb1—O2A—Sr2	−4.6 (13)
Nb2—Ba1—O1—Ba1B	−76.2 (16)	O3A—Nb1—O2A—Sr2vii	−97.8 (12)
Nb2—Ba1—O1—Ba1Bxvi	6.96 (12)	O3A—Nb1—O2B—Nb1vi	−166.4 (7)
Nb2—Ba1—O1—Nb1viii	100.79 (18)	O3A—Nb1—O2B—Sr2	−41.5 (7)
Nb2—Ba1—O1—Nb1	−100.79 (18)	O3A—Nb1—O2B—Sr2vii	−128.7 (6)
Nb2—Ba1—O1—Sr1vii	0.0	O3A—Nb1—O3B—Nb2xviii	−75.8 (12)
Nb2—Ba1—O5A—Nb2vii	180.0	O3A—Nb1—O3B—Sr1ix	49.7 (10)
Nb2—Ba1B—O1—Ba1vii	−54.0 (9)	O3A—Nb1—O3B—Sr1xvii	144.1 (11)
Nb2—Ba1B—O1—Ba1	49.9 (11)	O3A—Nb1—O4A—Ba1xvii	31.8 (2)
Nb2vii—Ba1B—O1—Ba1	96.6 (16)	O3A—Nb1—O4A—Nb1vii	−131.3 (10)
Nb2vii—Ba1B—O1—Ba1vii	−7.36 (12)	O3A—Nb1—O4A—Sr2vii	135.7 (2)
Nb2vii—Ba1B—O1—Ba1Bviii	82.62 (12)	O3A—Nb1—O4B—Nb1vii	22.8 (9)
Nb2vii—Ba1B—O1—Ba1Bvii	−14.0 (2)	O3A—Nb1—O4B—Sr1vii	−123.4 (2)
Nb2—Ba1B—O1—Ba1Bvii	−60.7 (9)	O3A—Nb1—O4B—Sr2vii	123.7 (2)
Nb2—Ba1B—O1—Ba1Bxvi	−46.9 (9)	O3Axi—Nb2—O5A—Ba1xii	43.73 (17)
Nb2vii—Ba1B—O1—Ba1Bxvi	−0.24 (7)	O3Ax—Nb2—O5A—Ba1xii	−43.73 (17)
Nb2—Ba1B—O1—Ba1Bviii	35.9 (9)	O3Aiv—Nb2—O5A—Ba1xii	136.27 (17)
Nb2vii—Ba1B—O1—Nb1	−107.3 (2)	O3Aiii—Nb2—O5A—Ba1xii	−136.27 (17)
Nb2—Ba1B—O1—Nb1	−154.0 (8)	O3Axi—Nb2—O5A—Ba1	−136.27 (17)
Nb2vii—Ba1B—O1—Nb1viii	93.4 (2)	O3Ax—Nb2—O5A—Ba1	136.27 (17)
Nb2—Ba1B—O1—Nb1viii	46.7 (10)	O3Aiii—Nb2—O5A—Ba1	43.73 (17)
Nb2—Ba1B—O1—Sr1vii	−54.0 (9)	O3Aiv—Nb2—O5A—Ba1	−43.73 (17)
Nb2vii—Ba1B—O1—Sr1vii	−7.36 (12)	O3Aiii—Nb2—O5B—Nb2vii	−137.53 (17)
Sr2vii—Nb1—O1—Ba1	87.5 (2)	O3Ax—Nb2—O5B—Nb2vii	−46.3 (2)
Sr2vii—Nb1—O1—Ba1vii	−7.2 (2)	O3Axi—Nb2—O5B—Nb2vii	46.3 (2)
Sr2vii—Nb1—O1—Ba1Bviii	87.1 (3)	O3Aiv—Nb2—O5B—Nb2vii	137.53 (17)
Sr2vii—Nb1—O1—Ba1B	84.3 (3)	O3Axi—Nb2—O5B—O5Bxii	46.3 (2)
Sr2vii—Nb1—O1—Ba1Bxvi	−7.6 (3)	O3Aiii—Nb2—O5B—O5Bxii	−137.53 (17)
Sr2vii—Nb1—O1—Ba1Bvii	−3.5 (2)	O3Ax—Nb2—O5B—O5Bxii	−46.3 (2)
Sr2vii—Nb1—O1—Nb1viii	−126.6 (4)	O3Aiv—Nb2—O5B—O5Bxii	137.53 (17)
Sr2vii—Nb1—O1—Sr1vii	−7.2 (2)	O3B—Nb1—O1—Ba1vii	128.4 (2)
Sr2vii—Nb1—O2A—Ba1vii	−100.1 (2)	O3B—Nb1—O1—Ba1	−136.9 (2)
Sr2vii—Nb1—O2A—Sr2	93.24 (19)	O3B—Nb1—O1—Ba1B	−140.0 (3)
Sr2vii—Nb1—O2B—Nb1vi	−37.7 (8)	O3B—Nb1—O1—Ba1Bviii	−137.3 (3)
Sr2vii—Nb1—O2B—Sr2	87.28 (17)	O3B—Nb1—O1—Ba1Bxvi	128.0 (3)
Sr2vii—Nb1—O3A—Ba1ix	−70.9 (3)	O3B—Nb1—O1—Ba1Bvii	132.1 (2)
Sr2vii—Nb1—O3A—Ba1xvii	16.7 (3)	O3B—Nb1—O1—Nb1viii	9.0 (5)
Sr2vii—Nb1—O3A—Nb2xviii	106.8 (4)	O3B—Nb1—O1—Sr1vii	128.4 (2)
Sr2vii—Nb1—O3B—Nb2xviii	142.8 (5)	O3B—Nb1—O2A—Ba1vii	−123.3 (14)
Sr2vii—Nb1—O3B—Sr1xvii	2.8 (3)	O3B—Nb1—O2A—Sr2	70.1 (15)
Sr2vii—Nb1—O3B—Sr1ix	−91.7 (2)	O3B—Nb1—O2A—Sr2vii	−23.1 (15)
Sr2vii—Nb1—O4A—Ba1xvii	−103.9 (2)	O3B—Nb1—O2B—Nb1vi	−140.1 (10)
Sr2vii—Nb1—O4A—Nb1vii	93.0 (10)	O3B—Nb1—O2B—Sr2vii	−102.4 (12)
Sr2vii—Nb1—O4B—Nb1vii	−100.9 (8)	O3B—Nb1—O2B—Sr2	−15.2 (13)
Sr2vii—Nb1—O4B—Sr1vii	112.9 (2)	O3B—Nb1—O3A—Ba1xvii	−28.6 (9)
O1i—Ba1—O1—Ba1vii	180.0	O3B—Nb1—O3A—Ba1ix	−116.2 (11)
O1i—Ba1—O1—Ba1Bvii	173.04 (12)	O3B—Nb1—O3A—Nb2xviii	61.4 (9)
O1i—Ba1—O1—Ba1Bviii	−103.8 (16)	O3B—Nb1—O4A—Ba1xvii	31.21 (17)
O1i—Ba1—O1—Ba1Bxvi	−173.04 (12)	O3B—Nb1—O4A—Nb1vii	−131.9 (10)
O1i—Ba1—O1—Ba1B	103.8 (16)	O3B—Nb1—O4A—Sr2vii	135.1 (2)
O1i—Ba1—O1—Nb1	79.21 (17)	O3B—Nb1—O4B—Nb1vii	19.3 (8)
O1i—Ba1—O1—Nb1viii	−79.21 (17)	O3B—Nb1—O4B—Sr1vii	−126.83 (18)
O1i—Ba1—O1—Sr1vii	180.0	O3B—Nb1—O4B—Sr2vii	120.23 (18)
O1—Ba1—O5A—Nb2	180.0	O3Biii—Nb2—O5A—Ba1	41.63 (12)
O1i—Ba1—O5A—Nb2	0.0	O3Biv—Nb2—O5A—Ba1	−41.63 (12)
O1i—Ba1—O5A—Nb2vii	180.0	O3Biii—Nb2—O5A—Ba1xii	−138.37 (12)
O1—Ba1—O5A—Nb2vii	0.0	O3Bxi—Nb2—O5A—Ba1xii	41.63 (12)
O1i—Ba1B—O1—Ba1vii	−173.32 (12)	O3Bx—Nb2—O5A—Ba1xii	−41.63 (12)
O1i—Ba1B—O1—Ba1	−69.4 (15)	O3Biv—Nb2—O5A—Ba1xii	138.37 (12)
O1i—Ba1B—O1—Ba1Bviii	−83.33 (13)	O3Bxi—Nb2—O5A—Ba1	−138.37 (12)
O1i—Ba1B—O1—Ba1Bxvi	−166.2 (2)	O3Bx—Nb2—O5A—Ba1	138.37 (12)
O1i—Ba1B—O1—Ba1Bvii	180.0	O3Bx—Nb2—O5B—Nb2vii	−42.08 (13)
O1i—Ba1B—O1—Nb1viii	−72.6 (3)	O3Biv—Nb2—O5B—Nb2vii	137.66 (13)
O1i—Ba1B—O1—Nb1	86.71 (19)	O3Biii—Nb2—O5B—Nb2vii	−137.66 (13)
O1i—Ba1B—O1—Sr1vii	−173.32 (12)	O3Bxi—Nb2—O5B—O5Bxii	42.08 (13)
O1—Nb1—O2A—Ba1vii	38.6 (2)	O3Bx—Nb2—O5B—O5Bxii	−42.08 (13)
O1—Nb1—O2A—Sr2vii	138.7 (2)	O3Biv—Nb2—O5B—O5Bxii	137.66 (13)
O1—Nb1—O2A—Sr2	−128.1 (2)	O3Biii—Nb2—O5B—O5Bxii	−137.66 (13)
O1—Nb1—O2B—Nb1vi	97.4 (9)	O4Aiii—Ba1—O1—Ba1vii	−78.44 (11)
O1—Nb1—O2B—Sr2vii	135.11 (19)	O4Aiv—Ba1—O1—Ba1vii	78.44 (11)
O1—Nb1—O2B—Sr2	−137.6 (2)	O4Aiii—Ba1—O1—Ba1B	−154.6 (16)
O1—Nb1—O3A—Ba1ix	139.8 (3)	O4Aiv—Ba1—O1—Ba1B	2.3 (15)
O1—Nb1—O3A—Ba1xvii	−132.6 (2)	O4Aiv—Ba1—O1—Ba1Bxvi	85.39 (17)
O1—Nb1—O3A—Nb2xviii	−42.6 (5)	O4Aiii—Ba1—O1—Ba1Bxvi	−71.48 (15)
O1—Nb1—O3B—Nb2xviii	1.5 (6)	O4Aiii—Ba1—O1—Ba1Bviii	−2.3 (15)
O1—Nb1—O3B—Sr1ix	126.9 (2)	O4Aiii—Ba1—O1—Ba1Bvii	−85.39 (17)
O1—Nb1—O3B—Sr1xvii	−138.6 (2)	O4Aiv—Ba1—O1—Ba1Bvii	71.48 (15)
O1—Nb1—O4A—Ba1xvii	126.55 (16)	O4Aiv—Ba1—O1—Ba1Bviii	154.6 (16)
O1—Nb1—O4A—Nb1vii	−36.5 (10)	O4Aiv—Ba1—O1—Nb1	−22.4 (2)
O1—Nb1—O4A—Sr2vii	−129.55 (16)	O4Aiii—Ba1—O1—Nb1	−179.22 (18)
O1—Nb1—O4B—Nb1vii	116.1 (8)	O4Aiv—Ba1—O1—Nb1viii	179.22 (18)
O1—Nb1—O4B—Sr1vii	−30.01 (16)	O4Aiii—Ba1—O1—Nb1viii	22.4 (2)
O1—Nb1—O4B—Sr2vii	−142.94 (16)	O4Aiv—Ba1—O1—Sr1vii	78.44 (11)
O2Ai—Ba1—O1—Ba1vii	125.56 (12)	O4Aiii—Ba1—O1—Sr1vii	−78.44 (11)
O2Aii—Ba1—O1—Ba1vii	−125.56 (12)	O4Aiii—Ba1—O5A—Nb2	−87.96 (9)
O2Aii—Ba1—O1—Ba1Bxvi	−118.60 (16)	O4Aiv—Ba1—O5A—Nb2	87.96 (9)
O2Ai—Ba1—O1—Ba1Bvii	118.60 (16)	O4Aiii—Ba1—O5A—Nb2vii	92.04 (9)
O2Aii—Ba1—O1—Ba1Bvii	−132.52 (18)	O4Aiv—Ba1—O5A—Nb2vii	−92.04 (9)
O2Ai—Ba1—O1—Ba1Bxvi	132.52 (18)	O4A—Nb1—O1—Ba1	140.7 (2)
O2Ai—Ba1—O1—Ba1B	49.4 (16)	O4Ai—Nb1—O1—Ba1	−49.5 (2)
O2Aii—Ba1—O1—Ba1B	158.3 (16)	O4Ai—Nb1—O1—Ba1vii	−144.22 (19)
O2Ai—Ba1—O1—Ba1Bviii	−158.3 (16)	O4A—Nb1—O1—Ba1vii	46.0 (2)
O2Aii—Ba1—O1—Ba1Bviii	−49.4 (16)	O4A—Nb1—O1—Ba1Bvii	49.7 (2)
O2Aii—Ba1—O1—Nb1viii	−24.8 (2)	O4Ai—Nb1—O1—Ba1B	−52.7 (3)
O2Ai—Ba1—O1—Nb1viii	−133.65 (19)	O4Ai—Nb1—O1—Ba1Bxvi	−144.6 (2)
O2Aii—Ba1—O1—Nb1	133.65 (19)	O4A—Nb1—O1—Ba1Bviii	140.3 (3)
O2Ai—Ba1—O1—Nb1	24.8 (2)	O4A—Nb1—O1—Ba1Bxvi	45.6 (3)
O2Ai—Ba1—O1—Sr1vii	125.56 (12)	O4Ai—Nb1—O1—Ba1Bviii	−49.9 (3)
O2Aii—Ba1—O1—Sr1vii	−125.56 (12)	O4A—Nb1—O1—Ba1B	137.5 (3)
O2Ai—Ba1—O5A—Nb2vii	−125.74 (14)	O4Ai—Nb1—O1—Ba1Bvii	−140.5 (2)
O2Aii—Ba1—O5A—Nb2vii	125.74 (14)	O4A—Nb1—O1—Nb1viii	−73.4 (5)
O2Aii—Ba1—O5A—Nb2	−54.26 (14)	O4Ai—Nb1—O1—Nb1viii	96.4 (5)
O2Ai—Ba1—O5A—Nb2	54.26 (14)	O4Ai—Nb1—O1—Sr1vii	−144.22 (19)
O2A—Nb1—O1—Ba1	46.6 (3)	O4A—Nb1—O1—Sr1vii	46.0 (2)
O2A—Nb1—O1—Ba1vii	−48.1 (3)	O4A—Nb1—O2A—Ba1vii	−63.1 (2)
O2A—Nb1—O1—Ba1Bvii	−44.4 (3)	O4Ai—Nb1—O2A—Ba1vii	131.6 (2)
O2A—Nb1—O1—Ba1Bviii	46.2 (4)	O4Ai—Nb1—O2A—Sr2	−35.0 (2)
O2A—Nb1—O1—Ba1B	43.4 (3)	O4Ai—Nb1—O2A—Sr2vii	−128.3 (2)
O2A—Nb1—O1—Ba1Bxvi	−48.5 (3)	O4A—Nb1—O2A—Sr2vii	37.1 (3)
O2A—Nb1—O1—Nb1viii	−167.5 (5)	O4A—Nb1—O2A—Sr2	130.3 (2)
O2A—Nb1—O1—Sr1vii	−48.1 (3)	O4Ai—Nb1—O2B—Nb1vi	−169.8 (9)
O2Aix—Nb1—O2A—Ba1vii	−143.76 (11)	O4A—Nb1—O2B—Nb1vi	−4.1 (10)
O2Aix—Nb1—O2A—Sr2	49.6 (3)	O4Ai—Nb1—O2B—Sr2	−44.8 (2)
O2Aix—Nb1—O2A—Sr2vii	−43.6 (3)	O4A—Nb1—O2B—Sr2vii	33.6 (2)
O2A—Nb1—O2B—Nb1vi	−13.5 (7)	O4Ai—Nb1—O2B—Sr2vii	−132.1 (2)
O2Aix—Nb1—O2B—Nb1vi	−84.2 (10)	O4A—Nb1—O2B—Sr2	120.9 (2)
O2Aix—Nb1—O2B—Sr2	40.7 (3)	O4Ai—Nb1—O3A—Ba1ix	48.1 (3)
O2Aix—Nb1—O2B—Sr2vii	−46.6 (3)	O4A—Nb1—O3A—Ba1xvii	−30.8 (2)
O2A—Nb1—O2B—Sr2vii	24.2 (12)	O4Ai—Nb1—O3A—Ba1xvii	135.7 (2)
O2A—Nb1—O2B—Sr2	111.4 (13)	O4A—Nb1—O3A—Ba1ix	−118.4 (3)
O2Aix—Nb1—O3A—Ba1xvii	50.2 (2)	O4A—Nb1—O3A—Nb2xviii	59.2 (5)
O2Aix—Nb1—O3A—Ba1ix	−37.4 (3)	O4Ai—Nb1—O3A—Nb2xviii	−134.3 (5)
O2A—Nb1—O3A—Ba1ix	16.3 (13)	O4Ai—Nb1—O3B—Nb2xviii	−90.8 (6)
O2A—Nb1—O3A—Ba1xvii	103.8 (12)	O4A—Nb1—O3B—Nb2xviii	102.0 (6)
O2A—Nb1—O3A—Nb2xviii	−166.1 (10)	O4Ai—Nb1—O3B—Sr1ix	34.7 (2)
O2Aix—Nb1—O3A—Nb2xviii	140.2 (5)	O4A—Nb1—O3B—Sr1xvii	−38.1 (2)
O2Aix—Nb1—O3B—Nb2xviii	−176.4 (6)	O4A—Nb1—O3B—Sr1ix	−132.5 (3)
O2A—Nb1—O3B—Nb2xviii	163.2 (11)	O4Ai—Nb1—O3B—Sr1xvii	129.1 (3)
O2Aix—Nb1—O3B—Sr1xvii	43.6 (3)	O4Ai—Nb1—O4A—Ba1xvii	−16.9 (11)
O2A—Nb1—O3B—Sr1ix	−71.3 (15)	O4Ai—Nb1—O4A—Nb1vii	180.003 (2)
O2A—Nb1—O3B—Sr1xvii	23.1 (15)	O4Ai—Nb1—O4A—Sr2vii	87.0 (10)
O2Aix—Nb1—O3B—Sr1ix	−50.9 (3)	O4A—Nb1—O4B—Nb1vii	−13.0 (6)
O2Aix—Nb1—O4A—Ba1xvii	−56.1 (2)	O4A—Nb1—O4B—Sr1vii	−159.2 (7)
O2A—Nb1—O4A—Ba1xvii	−139.1 (2)	O4A—Nb1—O4B—Sr2vii	87.9 (7)
O2Aix—Nb1—O4A—Nb1vii	140.8 (10)	O4B—Nb1—O1—Ba1vii	30.43 (19)
O2A—Nb1—O4A—Nb1vii	57.9 (10)	O4B—Nb1—O1—Ba1	125.2 (2)
O2Aix—Nb1—O4A—Sr2vii	47.8 (2)	O4Bi—Nb1—O1—Ba1vii	−130.67 (18)
O2A—Nb1—O4A—Sr2vii	−35.2 (2)	O4Bi—Nb1—O1—Ba1	−35.9 (2)
O2Aix—Nb1—O4B—Nb1vii	−67.0 (8)	O4Bi—Nb1—O1—Ba1Bvii	−127.0 (2)
O2A—Nb1—O4B—Nb1vii	−149.9 (8)	O4B—Nb1—O1—Ba1Bviii	124.7 (3)
O2Aix—Nb1—O4B—Sr1vii	146.8 (2)	O4Bi—Nb1—O1—Ba1Bviii	−36.4 (3)
O2A—Nb1—O4B—Sr1vii	63.9 (2)	O4B—Nb1—O1—Ba1Bvii	34.1 (2)
O2A—Nb1—O4B—Sr2vii	−49.0 (2)	O4Bi—Nb1—O1—Ba1B	−39.1 (2)
O2Aix—Nb1—O4B—Sr2vii	33.9 (2)	O4B—Nb1—O1—Ba1Bxvi	30.1 (2)
O2Axiv—Sr2—O2A—Ba1vii	−47.7 (9)	O4Bi—Nb1—O1—Ba1Bxvi	−131.0 (2)
O2Ai—Sr2—O2A—Ba1vii	8.5 (8)	O4B—Nb1—O1—Ba1B	122.0 (3)
O2Aiv—Sr2—O2A—Ba1vii	64.6 (9)	O4Bi—Nb1—O1—Nb1viii	109.9 (5)
O2Ai—Sr2—O2A—Nb1vi	−87.2 (2)	O4B—Nb1—O1—Nb1viii	−89.0 (5)
O2Ai—Sr2—O2A—Nb1	85.9 (2)	O4Bi—Nb1—O1—Sr1vii	−130.67 (18)
O2Aiv—Sr2—O2A—Nb1	142.0 (2)	O4B—Nb1—O1—Sr1vii	30.43 (19)
O2Aiv—Sr2—O2A—Nb1vi	−31.0 (4)	O4Bi—Nb1—O2A—Ba1vii	120.0 (2)
O2Axiv—Sr2—O2A—Nb1	29.7 (4)	O4B—Nb1—O2A—Ba1vii	−49.64 (19)
O2Axiv—Sr2—O2A—Nb1vi	−143.36 (19)	O4Bi—Nb1—O2A—Sr2	−46.7 (2)
O2Aiv—Sr2—O2A—Sr2vii	−123.84 (16)	O4Bi—Nb1—O2A—Sr2vii	−139.9 (2)
O2Ai—Sr2—O2A—Sr2vii	180.0	O4B—Nb1—O2A—Sr2vii	50.5 (2)
O2Axiv—Sr2—O2A—Sr2vii	123.84 (16)	O4B—Nb1—O2A—Sr2	143.7 (3)
O2Axiv—Sr2—O2B—Nb1	46.5 (3)	O4B—Nb1—O2B—Nb1vi	8.5 (9)
O2Aiv—Sr2—O2B—Nb1vi	−47.3 (3)	O4Bi—Nb1—O2B—Nb1vi	179.3 (10)
O2Ai—Sr2—O2B—Nb1vi	−99.4 (2)	O4Bi—Nb1—O2B—Sr2vii	−143.1 (2)
O2Axiv—Sr2—O2B—Nb1vi	−151.60 (16)	O4B—Nb1—O2B—Sr2vii	46.15 (19)
O2Aiv—Sr2—O2B—Nb1	150.83 (17)	O4Bi—Nb1—O2B—Sr2	−55.80 (19)
O2Ai—Sr2—O2B—Nb1	98.7 (2)	O4B—Nb1—O2B—Sr2	133.4 (2)
O2Ai—Sr2—O2B—Sr2vii	−179.98 (17)	O4B—Nb1—O3A—Ba1ix	−129.9 (3)
O2Axiv—Sr2—O2B—Sr2vii	127.86 (17)	O4B—Nb1—O3A—Ba1xvii	−42.3 (3)
O2Aiv—Sr2—O2B—Sr2vii	−127.84 (19)	O4Bi—Nb1—O3A—Ba1xvii	145.6 (2)
O2Bix—Nb1—O1—Ba1vii	−143.5 (7)	O4Bi—Nb1—O3A—Ba1ix	58.1 (3)
O2B—Nb1—O1—Ba1vii	−60.7 (2)	O4B—Nb1—O3A—Nb2xviii	47.8 (5)
O2Bix—Nb1—O1—Ba1	−48.7 (8)	O4Bi—Nb1—O3A—Nb2xviii	−124.3 (5)
O2B—Nb1—O1—Ba1	34.0 (2)	O4B—Nb1—O3B—Nb2xviii	91.4 (6)
O2B—Nb1—O1—Ba1Bxvi	−61.1 (3)	O4Bi—Nb1—O3B—Nb2xviii	−81.7 (6)
O2Bix—Nb1—O1—Ba1Bvii	−139.8 (8)	O4B—Nb1—O3B—Sr1ix	−143.1 (2)
O2B—Nb1—O1—Ba1Bvii	−57.0 (2)	O4Bi—Nb1—O3B—Sr1xvii	138.3 (2)
O2Bix—Nb1—O1—Ba1Bxvi	−143.8 (8)	O4B—Nb1—O3B—Sr1xvii	−48.7 (2)
O2B—Nb1—O1—Ba1Bviii	33.6 (3)	O4Bi—Nb1—O3B—Sr1ix	43.8 (2)
O2Bix—Nb1—O1—Ba1Bviii	−49.2 (8)	O4B—Nb1—O4A—Ba1xvii	178.8 (7)
O2B—Nb1—O1—Ba1B	30.8 (3)	O4B—Nb1—O4A—Nb1vii	15.7 (7)
O2Bix—Nb1—O1—Ba1B	−51.9 (8)	O4B—Nb1—O4A—Sr2vii	−77.3 (6)
O2Bix—Nb1—O1—Nb1viii	97.1 (9)	O4Bi—Nb1—O4B—Nb1vii	180.003 (2)
O2B—Nb1—O1—Nb1viii	179.9 (5)	O4Bi—Nb1—O4B—Sr1vii	33.9 (9)
O2B—Nb1—O1—Sr1vii	−60.7 (2)	O4Bi—Nb1—O4B—Sr2vii	−79.1 (8)
O2Bix—Nb1—O1—Sr1vii	−143.5 (7)	O4Bxiii—Sr2—O2A—Ba1vii	142.2 (7)
O2B—Nb1—O2A—Ba1vii	107.9 (13)	O4Bxiv—Sr2—O2A—Ba1vii	−109.5 (7)
O2Bix—Nb1—O2A—Ba1vii	−156.19 (15)	O4Biv—Sr2—O2A—Ba1vii	68.2 (7)
O2B—Nb1—O2A—Sr2vii	−152.0 (14)	O4Bi—Sr2—O2A—Ba1vii	−35.7 (7)
O2Bix—Nb1—O2A—Sr2vii	−56.1 (2)	O4Biv—Sr2—O2A—Nb1vi	−27.5 (2)
O2B—Nb1—O2A—Sr2	−58.7 (12)	O4Bi—Sr2—O2A—Nb1	41.66 (19)
O2Bix—Nb1—O2A—Sr2	37.2 (2)	O4Biv—Sr2—O2A—Nb1	145.5 (3)
O2Bix—Nb1—O2B—Nb1vi	−97.3 (9)	O4Bxiv—Sr2—O2A—Nb1	−32.1 (3)
O2Bix—Nb1—O2B—Sr2	27.7 (3)	O4Bxiii—Sr2—O2A—Nb1	−140.4 (2)
O2Bix—Nb1—O2B—Sr2vii	−59.6 (2)	O4Bi—Sr2—O2A—Nb1vi	−131.4 (3)
O2B—Nb1—O3A—Ba1xvii	132.2 (6)	O4Bxiii—Sr2—O2A—Nb1vi	46.5 (3)
O2Bix—Nb1—O3A—Ba1ix	−25.9 (3)	O4Bxiv—Sr2—O2A—Nb1vi	154.87 (19)
O2B—Nb1—O3A—Ba1ix	44.6 (7)	O4Bxiii—Sr2—O2A—Sr2vii	−46.3 (2)
O2Bix—Nb1—O3A—Ba1xvii	61.7 (2)	O4Bxiv—Sr2—O2A—Sr2vii	62.06 (18)
O2B—Nb1—O3A—Nb2xviii	−137.8 (5)	O4Bi—Sr2—O2A—Sr2vii	135.8 (2)
O2Bix—Nb1—O3A—Nb2xviii	151.8 (5)	O4Biv—Sr2—O2A—Sr2vii	−120.32 (18)
O2Bix—Nb1—O3B—Nb2xviii	−163.6 (6)	O4Biv—Sr2—O2B—Nb1	161.9 (3)
O2B—Nb1—O3B—Nb2xviii	−120.3 (11)	O4Bi—Sr2—O2B—Nb1	50.22 (18)
O2B—Nb1—O3B—Sr1xvii	99.6 (12)	O4Biv—Sr2—O2B—Nb1vi	−36.26 (17)
O2Bix—Nb1—O3B—Sr1xvii	56.3 (2)	O4Bxiv—Sr2—O2B—Nb1vi	146.70 (17)
O2Bix—Nb1—O3B—Sr1ix	−38.1 (2)	O4Bxiii—Sr2—O2B—Nb1vi	29.3 (3)
O2B—Nb1—O3B—Sr1ix	5.1 (13)	O4Bi—Sr2—O2B—Nb1vi	−147.9 (3)
O2B—Nb1—O4A—Ba1xvii	−141.2 (2)	O4Bxiii—Sr2—O2B—Nb1	−132.61 (19)
O2Bix—Nb1—O4A—Ba1xvii	−51.0 (2)	O4Bxiv—Sr2—O2B—Nb1	−15.2 (3)
O2B—Nb1—O4A—Nb1vii	55.7 (10)	O4Bxiii—Sr2—O2B—Sr2vii	−51.3 (2)
O2Bix—Nb1—O4A—Nb1vii	145.9 (10)	O4Bi—Sr2—O2B—Sr2vii	131.6 (2)
O2B—Nb1—O4A—Sr2vii	−37.3 (3)	O4Bxiv—Sr2—O2B—Sr2vii	66.16 (17)
O2Bix—Nb1—O4A—Sr2vii	52.9 (2)	O4Biv—Sr2—O2B—Sr2vii	−116.80 (17)
O2B—Nb1—O4B—Nb1vii	−155.0 (8)	O5A—Ba1—O1—Ba1vii	0.0
O2Bix—Nb1—O4B—Nb1vii	−65.5 (8)	O5A—Ba1—O1—Ba1Bviii	76.2 (16)
O2Bix—Nb1—O4B—Sr1vii	148.4 (2)	O5A—Ba1—O1—Ba1Bxvi	6.96 (12)
O2B—Nb1—O4B—Sr1vii	58.8 (2)	O5A—Ba1—O1—Ba1B	−76.2 (16)
O2Bix—Nb1—O4B—Sr2vii	35.4 (2)	O5A—Ba1—O1—Ba1Bvii	−6.96 (12)
O2B—Nb1—O4B—Sr2vii	−54.1 (2)	O5A—Ba1—O1—Nb1	−100.79 (18)
O2Bxv—Sr2—O2A—Ba1vii	−171.5 (7)	O5A—Ba1—O1—Nb1viii	100.79 (17)
O2Bix—Sr2—O2A—Ba1vii	−110.1 (7)	O5A—Ba1—O1—Sr1vii	0.0
O2Bvi—Sr2—O2A—Ba1vii	127.1 (8)	O5Ai—Nb2—O5B—Nb2vii	180.000 (1)
O2B—Sr2—O2A—Ba1vii	8.3 (7)	O5A—Nb2—O5B—Nb2vii	0.0
O2B—Sr2—O2A—Nb1vi	−87.3 (12)	O5A—Nb2—O5B—O5Bxii	0.000 (3)
O2Bvi—Sr2—O2A—Nb1vi	31.40 (18)	O5Ai—Nb2—O5B—O5Bxii	180.000 (4)
O2Bxv—Sr2—O2A—Nb1vi	92.8 (2)	O5B—Nb2—O5A—Ba1	0.0
O2Bix—Sr2—O2A—Nb1vi	154.2 (3)	O5Bxii—Nb2—O5A—Ba1	180.000 (2)
O2Bxv—Sr2—O2A—Nb1	−94.2 (2)	O5Bxii—Nb2—O5A—Ba1xii	0.000 (2)
O2Bix—Sr2—O2A—Nb1	−32.76 (19)	O5B—Nb2—O5A—Ba1xii	180.0
O2B—Sr2—O2A—Nb1	85.7 (12)	O5Bxii—Nb2—O5B—Nb2vii	0.0