Literature DB >> 22346792

Terbium (lithium zinc) distannide, TbLi(1-x)Zn(x)Sn(2) (x = 0.2).

Andrij Stetskiv, Ivan Tarasiuk, Beata Rozdzynska-Kielbik, Igor Oshchapovsky, Volodymyr Pavlyuk.

Abstract

The new terbium (lithium zinc) distannide, TbLi(1-x)Zn(x)Sn(2) (x = 0.2) crystallizes in the ortho-rhom-bic CeNiSi(2) structure type with space group Cmcm and Pearson symbol oS16. Of the four independent 4c atom positions (m2m site symmetry), three are fully occupied by individual atoms (two by Sn and one by Tb atoms) and the fourth is occupied by Li and Zn atoms with a statistical distribution. The Tb coordination polyhedron is a 21-vertex pseudo-Frank-Kasper polyhedron. One Sn atom is enclosed in a tricapped trigonal prism, the second Sn atom is in a cubocta-hedron and the statistically distributed (Li,Zn) site is in a tetra-gonal anti-prism with one added atom. Electronic structure calculations were used for the elucidation of reasons for and the ability of mutual substitution of lithium and transition metals. Positive charge density was observed around the rare earth atom and the Li and Zn atoms, the negative charge density in the proximity of the Sn atoms.

Entities: Chemical Disease Gene Species

Year: 2012 PMID： 22346792 PMCID： PMC3274839 DOI： 10.1107/S1600536812002103

Source DB: PubMed Journal: Acta Crystallogr Sect E Struct Rep Online ISSN： 1600-5368

Related literature

For general background, see: Andersen et al. (1986 ▶); Pavlyuk et al. (2009 ▶). For related structures, see: Pavlyuk & Bodak (1992a ▶,b ▶); Pavlyuk et al. (1991 ▶, 1993 ▶). For isotypic structures, see: Pavlyuk et al. (1989 ▶).

Experimental

Crystal data

TbLi0.8Zn0.2Sn2 M = 414.85 Orthorhombic, a = 4.4495 (7) Å b = 17.699 (3) Å c = 4.3978 (7) Å V = 346.33 (9) Å3 Z = 4 Mo Kα radiation μ = 35.55 mm−1 T = 293 K 0.08 × 0.04 × 0.02 mm

Data collection

Oxford Diffraction Xcalibur3 CCD diffractometer Absorption correction: analytical (CrysAlis RED; Oxford Diffraction, 2008 ▶) T min = 0.344, T max = 0.658 1198 measured reflections 261 independent reflections 190 reflections with I > 2σ(I) R int = 0.041

Refinement

R[F 2 > 2σ(F 2)] = 0.027 wR(F 2) = 0.066 S = 1.19 261 reflections 20 parameters Δρmax = 2.15 e Å−3 Δρmin = −2.64 e Å−3 Data collection: CrysAlis CCD (Oxford Diffraction, 2008 ▶); cell refinement: CrysAlis CCD; data reduction: CrysAlis RED (Oxford Diffraction, 2008 ▶); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ▶); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 ▶); molecular graphics: DIAMOND (Brandenburg, 2006 ▶); software used to prepare material for publication: SHELXL97. Crystal structure: contains datablock(s) I, global. DOI: 10.1107/S1600536812002103/fi2120sup1.cif Structure factors: contains datablock(s) I. DOI: 10.1107/S1600536812002103/fi2120Isup2.hkl Additional supplementary materials: crystallographic information; 3D view; checkCIF report

TbLi_0.8Zn_0.2Sn₂	F(000) = 693.6
M_r = 414.85	D_x = 7.956 Mg m⁻³
Orthorhombic, Cmcm	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: -C 2c 2	Cell parameters from 261 reflections
a = 4.4495 (7) Å	θ = 4.6–28.0°
b = 17.699 (3) Å	µ = 35.55 mm⁻¹
c = 4.3978 (7) Å	T = 293 K
V = 346.33 (9) Å³	Prism, metallic dark grey
Z = 4	0.08 × 0.04 × 0.02 mm

Oxford Diffraction Xcalibur3 CCD diffractometer	261 independent reflections
Radiation source: fine-focus sealed tube	190 reflections with I > 2σ(I)
graphite	R_int = 0.041
Detector resolution: 0 pixels mm^-1	θ_max = 28.0°, θ_min = 4.6°
ω scans	h = −5→5
Absorption correction: analytical (CrysAlis RED; Oxford Diffraction, 2008)	k = −17→23
T_min = 0.344, T_max = 0.658	l = −5→5
1198 measured reflections

Refinement on F²	Primary atom site location: structure-invariant direct methods
Least-squares matrix: full	Secondary atom site location: difference Fourier map
R[F² > 2σ(F²)] = 0.027	w = 1/[σ²(F_o²) + (0.0272P)² + 2.6711P] where P = (F_o² + 2F_c²)/3
wR(F²) = 0.066	(Δ/σ)_max < 0.001
S = 1.19	Δρ_max = 2.15 e Å⁻³
261 reflections	Δρ_min = −2.64 e Å⁻³
20 parameters	Extinction correction: SHELXL97 (Sheldrick, 2008), Fc^*=kFc[1+0.001xFc²λ³/sin(2θ)]^-1/4
0 restraints	Extinction coefficient: 0.0039 (4)

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	U_iso*/U_eq	Occ. (<1)
Tb1	0.0000	0.39911 (5)	0.2500	0.0156 (4)
Sn1	0.0000	0.06101 (10)	0.2500	0.0296 (6)
Sn2	0.0000	0.75076 (8)	0.2500	0.0274 (6)
Zn	0.0000	0.1960 (5)	0.2500	0.022 (3)	0.198 (11)
Li	0.0000	0.1960 (5)	0.2500	0.022 (3)	0.80

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Tb1	0.0152 (5)	0.0167 (5)	0.0149 (6)	0.000	0.000	0.000
Sn1	0.0132 (8)	0.0638 (16)	0.0119 (9)	0.000	0.000	0.000
Sn2	0.0180 (8)	0.0423 (14)	0.0220 (10)	0.000	0.000	0.000
Zn	0.019 (5)	0.024 (5)	0.022 (6)	0.000	0.000	0.000
Li	0.019 (5)	0.024 (5)	0.022 (6)	0.000	0.000	0.000

Tb1—Sn1ⁱ	3.2067 (6)	Sn2—Li^viii	2.392 (4)
Tb1—Sn1ⁱⁱ	3.2067 (6)	Sn2—Zn^viii	2.392 (4)
Tb1—Sn1ⁱⁱⁱ	3.2067 (6)	Sn2—Li^vii	2.392 (4)
Tb1—Sn1^iv	3.2067 (6)	Sn2—Zn^vii	2.392 (4)
Tb1—Sn2^v	3.4414 (13)	Sn2—Li^xi	2.427 (4)
Tb1—Sn2^vi	3.4414 (13)	Sn2—Zn^xi	2.427 (4)
Tb1—Sn2^vii	3.4454 (14)	Sn2—Li^xii	2.427 (4)
Tb1—Sn2^viii	3.4454 (14)	Sn2—Zn^xii	2.427 (4)
Tb1—Liⁱⁱ	3.552 (4)	Sn2—Sn2^xiii	3.1282 (4)
Tb1—Znⁱⁱ	3.552 (4)	Sn2—Sn2^xiv	3.1282 (4)
Tb1—Liⁱ	3.552 (4)	Sn2—Sn2^xv	3.1282 (4)
Tb1—Znⁱ	3.552 (4)	Sn2—Sn2^xvi	3.1282 (4)
Sn1—Zn	2.389 (9)	Zn—Sn2^viii	2.392 (4)
Sn1—Sn1^ix	3.082 (3)	Zn—Sn2^vii	2.392 (4)
Sn1—Sn1^x	3.082 (3)	Zn—Sn2^vi	2.427 (4)
Sn1—Tb1ⁱ	3.2067 (6)	Zn—Sn2^v	2.427 (4)
Sn1—Tb1ⁱⁱ	3.2067 (6)	Zn—Tb1ⁱⁱ	3.552 (4)
Sn1—Tb1^iv	3.2067 (6)	Zn—Tb1ⁱ	3.552 (4)
Sn1—Tb1ⁱⁱⁱ	3.2067 (6)	Zn—Tb1ⁱⁱⁱ	3.552 (4)
Sn1—Tb1^v	3.6277 (15)	Zn—Tb1^iv	3.552 (4)
Sn1—Tb1^vi	3.6277 (15)

Sn1ⁱ—Tb1—Sn1ⁱⁱ	154.57 (8)	Li^viii—Sn2—Zn^viii	0.0
Sn1ⁱ—Tb1—Sn1ⁱⁱⁱ	87.86 (2)	Li^viii—Sn2—Li^vii	133.6 (4)
Sn1ⁱⁱ—Tb1—Sn1ⁱⁱⁱ	86.59 (2)	Zn^viii—Sn2—Li^vii	133.6 (4)
Sn1ⁱ—Tb1—Sn1^iv	86.59 (2)	Li^viii—Sn2—Zn^vii	133.6 (4)
Sn1ⁱⁱ—Tb1—Sn1^iv	87.86 (2)	Zn^viii—Sn2—Zn^vii	133.6 (4)
Sn1ⁱⁱⁱ—Tb1—Sn1^iv	154.57 (8)	Li^vii—Sn2—Zn^vii	0.0 (4)
Sn1ⁱ—Tb1—Sn2^v	128.06 (4)	Li^viii—Sn2—Li^xi	99.05 (15)
Sn1ⁱⁱ—Tb1—Sn2^v	73.71 (3)	Zn^viii—Sn2—Li^xi	99.05 (15)
Sn1ⁱⁱⁱ—Tb1—Sn2^v	73.71 (3)	Li^vii—Sn2—Li^xi	99.05 (15)
Sn1^iv—Tb1—Sn2^v	128.06 (4)	Zn^vii—Sn2—Li^xi	99.05 (15)
Sn1ⁱ—Tb1—Sn2^vi	73.71 (3)	Li^viii—Sn2—Zn^xi	99.05 (15)
Sn1ⁱⁱ—Tb1—Sn2^vi	128.06 (4)	Zn^viii—Sn2—Zn^xi	99.05 (15)
Sn1ⁱⁱⁱ—Tb1—Sn2^vi	128.06 (4)	Li^vii—Sn2—Zn^xi	99.05 (15)
Sn1^iv—Tb1—Sn2^vi	73.71 (3)	Zn^vii—Sn2—Zn^xi	99.05 (15)
Sn2^v—Tb1—Sn2^vi	80.55 (4)	Li^xi—Sn2—Zn^xi	0.0
Sn1ⁱ—Tb1—Sn2^vii	127.38 (4)	Li^viii—Sn2—Li^xii	99.05 (15)
Sn1ⁱⁱ—Tb1—Sn2^vii	74.44 (3)	Zn^viii—Sn2—Li^xii	99.05 (15)
Sn1ⁱⁱⁱ—Tb1—Sn2^vii	127.38 (4)	Li^vii—Sn2—Li^xii	99.05 (15)
Sn1^iv—Tb1—Sn2^vii	74.44 (3)	Zn^vii—Sn2—Li^xii	99.05 (15)
Sn2^v—Tb1—Sn2^vii	54.030 (13)	Li^xi—Sn2—Li^xii	132.9 (4)
Sn2^vi—Tb1—Sn2^vii	54.030 (13)	Zn^xi—Sn2—Li^xii	132.9 (4)
Sn1ⁱ—Tb1—Sn2^viii	74.44 (3)	Li^viii—Sn2—Zn^xii	99.05 (15)
Sn1ⁱⁱ—Tb1—Sn2^viii	127.38 (4)	Zn^viii—Sn2—Zn^xii	99.05 (15)
Sn1ⁱⁱⁱ—Tb1—Sn2^viii	74.44 (3)	Li^vii—Sn2—Zn^xii	99.05 (15)
Sn1^iv—Tb1—Sn2^viii	127.38 (4)	Zn^vii—Sn2—Zn^xii	99.05 (15)
Sn2^v—Tb1—Sn2^viii	54.030 (13)	Li^xi—Sn2—Zn^xii	132.9 (4)
Sn2^vi—Tb1—Sn2^viii	54.030 (13)	Zn^xi—Sn2—Zn^xii	132.9 (4)
Sn2^vii—Tb1—Sn2^viii	79.32 (4)	Li^xii—Sn2—Zn^xii	0.0 (4)
Sn1ⁱ—Tb1—Liⁱⁱ	164.43 (14)	Li^viii—Sn2—Sn2^xiii	130.50 (8)
Sn1ⁱⁱ—Tb1—Liⁱⁱ	41.00 (13)	Zn^viii—Sn2—Sn2^xiii	130.50 (8)
Sn1ⁱⁱⁱ—Tb1—Liⁱⁱ	95.41 (3)	Li^vii—Sn2—Sn2^xiii	50.01 (8)
Sn1^iv—Tb1—Liⁱⁱ	96.57 (3)	Zn^vii—Sn2—Sn2^xiii	50.01 (8)
Sn2^v—Tb1—Liⁱⁱ	39.97 (9)	Li^xi—Sn2—Sn2^xiii	49.05 (7)
Sn2^vi—Tb1—Liⁱⁱ	92.49 (12)	Zn^xi—Sn2—Sn2^xiii	49.05 (7)
Sn2^vii—Tb1—Liⁱⁱ	40.55 (9)	Li^xii—Sn2—Sn2^xiii	130.43 (9)
Sn2^viii—Tb1—Liⁱⁱ	91.74 (12)	Zn^xii—Sn2—Sn2^xiii	130.43 (9)
Sn1ⁱ—Tb1—Znⁱⁱ	164.43 (14)	Li^viii—Sn2—Sn2^xiv	50.01 (8)
Sn1ⁱⁱ—Tb1—Znⁱⁱ	41.00 (13)	Zn^viii—Sn2—Sn2^xiv	50.01 (8)
Sn1ⁱⁱⁱ—Tb1—Znⁱⁱ	95.41 (3)	Li^vii—Sn2—Sn2^xiv	130.50 (8)
Sn1^iv—Tb1—Znⁱⁱ	96.57 (3)	Zn^vii—Sn2—Sn2^xiv	130.50 (8)
Sn2^v—Tb1—Znⁱⁱ	39.97 (9)	Li^xi—Sn2—Sn2^xiv	130.43 (9)
Sn2^vi—Tb1—Znⁱⁱ	92.49 (12)	Zn^xi—Sn2—Sn2^xiv	130.43 (9)
Sn2^vii—Tb1—Znⁱⁱ	40.55 (9)	Li^xii—Sn2—Sn2^xiv	49.05 (7)
Sn2^viii—Tb1—Znⁱⁱ	91.74 (12)	Zn^xii—Sn2—Sn2^xiv	49.05 (7)
Liⁱⁱ—Tb1—Znⁱⁱ	0.0 (3)	Sn2^xiii—Sn2—Sn2^xiv	179.01 (11)
Sn1ⁱ—Tb1—Liⁱ	41.00 (13)	Li^viii—Sn2—Sn2^xv	50.01 (8)
Sn1ⁱⁱ—Tb1—Liⁱ	164.43 (14)	Zn^viii—Sn2—Sn2^xv	50.01 (8)
Sn1ⁱⁱⁱ—Tb1—Liⁱ	96.57 (3)	Li^vii—Sn2—Sn2^xv	130.50 (8)
Sn1^iv—Tb1—Liⁱ	95.41 (3)	Zn^vii—Sn2—Sn2^xv	130.50 (8)
Sn2^v—Tb1—Liⁱ	92.49 (12)	Li^xi—Sn2—Sn2^xv	49.05 (7)
Sn2^vi—Tb1—Liⁱ	39.97 (9)	Zn^xi—Sn2—Sn2^xv	49.05 (7)
Sn2^vii—Tb1—Liⁱ	91.74 (12)	Li^xii—Sn2—Sn2^xv	130.43 (9)
Sn2^viii—Tb1—Liⁱ	40.55 (9)	Zn^xii—Sn2—Sn2^xv	130.43 (9)
Liⁱⁱ—Tb1—Liⁱ	123.4 (3)	Sn2^xiii—Sn2—Sn2^xv	89.326 (13)
Znⁱⁱ—Tb1—Liⁱ	123.4 (3)	Sn2^xiv—Sn2—Sn2^xv	90.665 (13)
Sn1ⁱ—Tb1—Znⁱ	41.00 (13)	Li^viii—Sn2—Sn2^xvi	130.50 (8)
Sn1ⁱⁱ—Tb1—Znⁱ	164.43 (14)	Zn^viii—Sn2—Sn2^xvi	130.50 (8)
Sn1ⁱⁱⁱ—Tb1—Znⁱ	96.57 (3)	Li^vii—Sn2—Sn2^xvi	50.01 (8)
Sn1^iv—Tb1—Znⁱ	95.41 (3)	Zn^vii—Sn2—Sn2^xvi	50.01 (8)
Sn2^v—Tb1—Znⁱ	92.49 (12)	Li^xi—Sn2—Sn2^xvi	130.43 (9)
Sn2^vi—Tb1—Znⁱ	39.97 (9)	Zn^xi—Sn2—Sn2^xvi	130.43 (9)
Sn2^vii—Tb1—Znⁱ	91.74 (12)	Li^xii—Sn2—Sn2^xvi	49.05 (7)
Sn2^viii—Tb1—Znⁱ	40.55 (9)	Zn^xii—Sn2—Sn2^xvi	49.05 (7)
Liⁱⁱ—Tb1—Znⁱ	123.4 (3)	Sn2^xiii—Sn2—Sn2^xvi	90.665 (13)
Znⁱⁱ—Tb1—Znⁱ	123.4 (3)	Sn2^xiv—Sn2—Sn2^xvi	89.326 (13)
Liⁱ—Tb1—Znⁱ	0.0 (3)	Sn2^xv—Sn2—Sn2^xvi	179.01 (11)
Zn—Sn1—Sn1^ix	134.48 (5)	Sn1—Zn—Sn2^viii	113.2 (2)
Zn—Sn1—Sn1^x	134.48 (5)	Sn1—Zn—Sn2^vii	113.2 (2)
Sn1^ix—Sn1—Sn1^x	91.03 (10)	Sn2^viii—Zn—Sn2^vii	133.6 (4)
Zn—Sn1—Tb1ⁱ	77.28 (4)	Sn1—Zn—Sn2^vi	113.5 (2)
Sn1^ix—Sn1—Tb1ⁱ	130.05 (5)	Sn2^viii—Zn—Sn2^vi	80.95 (15)
Sn1^x—Sn1—Tb1ⁱ	70.427 (15)	Sn2^vii—Zn—Sn2^vi	80.95 (15)
Zn—Sn1—Tb1ⁱⁱ	77.28 (4)	Sn1—Zn—Sn2^v	113.5 (2)
Sn1^ix—Sn1—Tb1ⁱⁱ	70.427 (15)	Sn2^viii—Zn—Sn2^v	80.95 (15)
Sn1^x—Sn1—Tb1ⁱⁱ	130.05 (5)	Sn2^vii—Zn—Sn2^v	80.95 (15)
Tb1ⁱ—Sn1—Tb1ⁱⁱ	154.57 (8)	Sn2^vi—Zn—Sn2^v	132.9 (4)
Zn—Sn1—Tb1^iv	77.28 (4)	Sn1—Zn—Tb1ⁱⁱ	61.72 (13)
Sn1^ix—Sn1—Tb1^iv	70.427 (15)	Sn2^viii—Zn—Tb1ⁱⁱ	139.08 (5)
Sn1^x—Sn1—Tb1^iv	130.05 (5)	Sn2^vii—Zn—Tb1ⁱⁱ	67.52 (6)
Tb1ⁱ—Sn1—Tb1^iv	86.59 (2)	Sn2^vi—Zn—Tb1ⁱⁱ	139.77 (5)
Tb1ⁱⁱ—Sn1—Tb1^iv	87.86 (2)	Sn2^v—Zn—Tb1ⁱⁱ	67.36 (6)
Zn—Sn1—Tb1ⁱⁱⁱ	77.28 (4)	Sn1—Zn—Tb1ⁱ	61.72 (13)
Sn1^ix—Sn1—Tb1ⁱⁱⁱ	130.05 (5)	Sn2^viii—Zn—Tb1ⁱ	67.52 (6)
Sn1^x—Sn1—Tb1ⁱⁱⁱ	70.427 (15)	Sn2^vii—Zn—Tb1ⁱ	139.08 (5)
Tb1ⁱ—Sn1—Tb1ⁱⁱⁱ	87.86 (2)	Sn2^vi—Zn—Tb1ⁱ	67.36 (6)
Tb1ⁱⁱ—Sn1—Tb1ⁱⁱⁱ	86.59 (2)	Sn2^v—Zn—Tb1ⁱ	139.77 (5)
Tb1^iv—Sn1—Tb1ⁱⁱⁱ	154.57 (8)	Tb1ⁱⁱ—Zn—Tb1ⁱ	123.4 (3)
Zn—Sn1—Tb1^v	142.173 (19)	Sn1—Zn—Tb1ⁱⁱⁱ	61.72 (13)
Sn1^ix—Sn1—Tb1^v	56.40 (4)	Sn2^viii—Zn—Tb1ⁱⁱⁱ	67.52 (6)
Sn1^x—Sn1—Tb1^v	56.40 (4)	Sn2^vii—Zn—Tb1ⁱⁱⁱ	139.08 (5)
Tb1ⁱ—Sn1—Tb1^v	126.82 (4)	Sn2^vi—Zn—Tb1ⁱⁱⁱ	139.77 (5)
Tb1ⁱⁱ—Sn1—Tb1^v	75.43 (3)	Sn2^v—Zn—Tb1ⁱⁱⁱ	67.36 (6)
Tb1^iv—Sn1—Tb1^v	126.82 (4)	Tb1ⁱⁱ—Zn—Tb1ⁱⁱⁱ	76.49 (11)
Tb1ⁱⁱⁱ—Sn1—Tb1^v	75.43 (3)	Tb1ⁱ—Zn—Tb1ⁱⁱⁱ	77.56 (11)
Zn—Sn1—Tb1^vi	142.173 (19)	Sn1—Zn—Tb1^iv	61.72 (13)
Sn1^ix—Sn1—Tb1^vi	56.40 (4)	Sn2^viii—Zn—Tb1^iv	139.08 (5)
Sn1^x—Sn1—Tb1^vi	56.40 (4)	Sn2^vii—Zn—Tb1^iv	67.52 (6)
Tb1ⁱ—Sn1—Tb1^vi	75.43 (3)	Sn2^vi—Zn—Tb1^iv	67.36 (6)
Tb1ⁱⁱ—Sn1—Tb1^vi	126.82 (4)	Sn2^v—Zn—Tb1^iv	139.77 (5)
Tb1^iv—Sn1—Tb1^vi	75.43 (3)	Tb1ⁱⁱ—Zn—Tb1^iv	77.56 (11)
Tb1ⁱⁱⁱ—Sn1—Tb1^vi	126.82 (4)	Tb1ⁱ—Zn—Tb1^iv	76.49 (11)
Tb1^v—Sn1—Tb1^vi	75.65 (4)	Tb1ⁱⁱⁱ—Zn—Tb1^iv	123.4 (3)

1 in total

1. A short history of SHELX.

Authors: George M Sheldrick
Journal: Acta Crystallogr A Date: 2007-12-21 Impact factor: 2.290

1 in total

2 in total

1. Thulium nickel/lithium distannide, TmNi1-x Li x Sn2 (x = 0.035).

Authors: Andrij Stetskiv; Ivan Tarasiuk; Renata Misztal; Volodymyr Pavlyuk
Journal: Acta Crystallogr Sect E Struct Rep Online Date: 2013-10-12

2. Penta-lanthanum zinc diplumbide, La5Zn1-x Pb2+x (x ≃ 0.6).

Authors: Igor Oshchapovsky; Volodymyr Pavlyuk; Grygoriy Dmytriv; Bernd Harbrecht
Journal: Acta Crystallogr Sect E Struct Rep Online Date: 2013-12-18

2 in total