The structure of the title compound, Mn(II)[Fe(III)(CN)(6)](2/3)·5H(2)O, features a face-centered cubic -Mn-NC-Fe- framework with both Mn and Fe having site symmetry mm. Since one-third of the [Fe(CN)(6)](3-) units are missing for a given formula in order to maintain charge neutrality, each Mn atom around such a vacancy is coordinated not only by the N atoms of the CN groups but also by the O atoms of the ligand water mol-ecules. In addition to ligand water mol-ecules, two types of non-coordinated water mol-ecules, so-called zeolitic water mol-ecules, exist in the inter-stitial sites of the -Mn-NC-Fe- framework. The positions of the O atoms of the zeolitic water mol-ecules are fixed by the linkage via hydrogen bonds between ligand water and zeolitic water mol-ecules. The structure is related to a recently reported rubidium manganese hexa-cyano-ferrate. Site occupancy factors for Fe, C, N are 0.67; for two O atoms the value is 0.83 and for one O atom is 0.17.
The structure of the title compound, Mn(II)[n class="Chemical">Fe(III)(CN)(6)](2/3)·5H(2)O, features a face-centered cubic -Mn-NC-Fe- framework with both Mn and Fe having site symmetry mm. Since one-third of the [Fe(CN)(6)](3-) units are missing for a given formula in order to maintain charge neutrality, each Mn atom around such a vacancy is coordinated not only by the N atoms of the CN groups but also by the O atoms of the ligand water mol-ecules. In addition to ligand water mol-ecules, two types of non-coordinated water mol-ecules, so-called zeolitic water mol-ecules, exist in the inter-stitial sites of the -Mn-NC-Fe- framework. The positions of the O atoms of the zeolitic water mol-ecules are fixed by the linkage via hydrogen bonds between ligand water and zeolitic water mol-ecules. The structure is related to a recently reported rubidium manganese hexa-cyano-ferrate. Site occupancy factors for Fe, C, N are 0.67; for two O atoms the value is 0.83 and for one O atom is 0.17.
For structure and properties of the related rubidium manganese hexacyanon class="Chemical">ferrate, see: Kato et al. (2003 ▶); Tokoro et al. (2007 ▶). For general background on Prussian blue compounds, see: Ludi & Güdel (1973 ▶). For related literature, see: Egan et al. (2006 ▶); Ferlay et al. (1995 ▶); Güdel et al. (1973 ▶); Gadet et al. (1992 ▶); Hatlevik et al. (1999 ▶); Holmes & Girolami (1999 ▶); Ludi et al. (1970 ▶); Margadonna et al. (2004 ▶); Ohkoshi & Hashimoto (2001 ▶); Ohkoshi et al. (1997 ▶, 2000 ▶, 2004 ▶, 2005 ▶); Sato et al. (1996 ▶); Tokoro et al. (2003 ▶, 2004 ▶); Zeigler et al. (1999 ▶).
Rigaku R-AXIS RAPID diffractometerAbsorption correction: multi-scan (ABSCOR; Higashi, 1995 ▶) T
min = 0.655, T
max = 0.73915777 measured reflections278 independent reflections268 reflections with F
2 > 2σ(F
2)R
int = 0.032
Refinement
R[F
2 > 2σ(F
2)] = 0.047wR(F
2) = 0.136S = 1.37278 reflections21 parametersH-atom parameters not definedΔρmax = 0.59 e Å−3Δρmin = −1.41 e Å−3Data collection: PROCESS-AUTO (Rigaku, 1998 ▶); cell refinement: PROCESS-AUTO; data reduction: CrystalStructure (Rigaku, 2007 ▶); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ▶); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 ▶); molecular graphics: VESTA (Momma & Izumi, 2006 ▶); software used to prepare material for publication: CrystalStructure.Crystal structure: contains datablocks global, I. DOI: 10.1107/S1600536807068869/sq2003sup1.cifStructure factors: contains datablocks I. DOI: 10.1107/S1600536807068869/sq2003Isup2.hklAdditional supplementary materials: crystallographic information; 3D view; checkCIF report
Mn[Fe(CN)6]0.6667·5H2O
Z = 4
Mr = 286.50
F000 = 577.68
Cubic, Fm3m
Dx = 1.699 Mg m−3Dm = 1.64 (1) Mg m−3Dm measured by flotation in toluene and tetrabromomethane
w = 1/[σ2(Fo2) + (0.0526P)2 + 2.6431P] where P = (Fo2 + 2Fc2)/3
R[F2 > 2σ(F2)] = 0.047
(Δ/σ)max < 0.001
wR(F2) = 0.136
Δρmax = 0.59 e Å−3
S = 1.37
Δρmin = −1.41 e Å−3
278 reflections
Extinction correction: SHELXL97 (Sheldrick, 1997)
21 parameters
Extinction coefficient: 0.002 (2)
H-atom parameters not defined
Refinement. Refinement was performed using all reflections. The weighted R-factor
(wR) and goodness of fit (S) are based on F2.
R-factor (gt) are based on F. The threshold expression of
F2 > 2.0 σ(F2) is used only for calculating R-factor
(gt).
Authors: K Kato; Y Moritomo; M Takata; M Sakata; M Umekawa; N Hamada; S Ohkoshi; H Tokoro; K Hashimoto Journal: Phys Rev Lett Date: 2003-12-17 Impact factor: 9.161