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Crystal Structure and Thermal Behaviour of K 2 [CrF 5 ·H 2 O]
Author(s) -
Sassoye Capucine,
de Kozak Ariel
Publication year - 2006
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200500458
Subject(s) - isostructural , orthorhombic crystal system , monoclinic crystal system , crystallography , diffractometer , octahedron , crystal structure , rietveld refinement , anhydrous , group (periodic table) , chemistry , crystal (programming language) , materials science , organic chemistry , computer science , programming language
K 2 [CrF 5 ·H 2 O] is monoclinic: a = 9.6835(3) Å, b = 7.7359(2) Å, c = 7.9564(3) Å, β = 95.94(1)°, Z = 4, space group C2/c (n o 15). Its crystal structure was solved from its X‐ray powder pattern recorded on a powder diffractometer, using for the refinement the Rietveld method. It is built up from isolated octahedral [CrF 5 ·OH 2 ] 2− anions separated by potassium cations. The dehydration of K 2 [CrF 5 ·H 2 O] leads to anhydrous orthorhombic K 2 CrF 5 : a = 7.334(2) Å, b = 12.804(4) Å, c = 20.151(5) Å, Z = 16, space group Pbcn (n o 60), isostructural with K 2 FeF 5 .