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Pseudo-merohedrally twinned praseodymium hexacyanoferrate(III) tetrahydrate

Vratislav Langer (Institutionen för oorganisk miljökemi) ; Lubomir Smrcok ; Yoshio Masuda
Acta Crystallographica Section C: Crystal Structure Communications (ISSN 0108-2701). Vol. C60 (2004), 11, p. i104-i106.
[Artikel, refereegranskad vetenskaplig]

Crystals of the title compound, diaquahexa-mu-cyano-ferrate(III)praseodymium(III) dihydrate, Pr[Fe(CN)6]·4H2O or [PrFe(CN)6(H2O)2]·2H2O, are twinned with three components. The Pr atom is coordinated by eight atoms, viz. six N and two symmetry-related water O atoms. The Pr polyhedron (Pr has site symmetry m2m, Wyckoff position 4c) is linked to an FeC6 octahedron (Fe located on a site with imposed 2/m symmetry, Wyckoff position 4b) through N atoms, forming an infinite array. The second (symmetry independent) water molecule lies on a mirror plane, is not included in coordination and is weakly hydrogen bonded to N atoms.

Nyckelord: X-ray structure determination, praseodymium, hexacyanoferrate, pseudo-merohedral twin



Denna post skapades 2006-08-29.
CPL Pubid: 1833

 

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