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Ba 3 V 2 O 4 F 8 : [V 4 (O,F) 20 ] 8− tetrameric groups of octahedra inserted a tridimensional network of (FBa 4 ) tetrahedra
Author(s) -
CrosnierLopez M. P.,
Duroy H.,
Fourquet J. L.
Publication year - 1993
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.19936190915
Subject(s) - octahedron , crystallography , crystal structure , tetrahedron , valence (chemistry) , bond length , x ray crystallography , group (periodic table) , oxygen atom , fluorine , diffraction , single crystal , chemistry , hydrothermal synthesis , hydrothermal circulation , inorganic compound , physics , molecule , geology , organic chemistry , seismology , optics
Ba 3 V 2 O 4 F 8 is prepared by hydrothermal synthesis. The crystal structure is established from single crystal X‐ray diffraction data: Space group Pnnm, Z = 4, a = 9.945(4) Å, b = 10.277(1) Å and c = 9.673(1) Å R = 0.0331, R w = 0.0315 for 892 independent reflections and 86 parameters. The structure is related to that Ba 3 Al 2 F 12 and is described in terms of isolated [V 4 (O,F) 20 ] 8− tetrameric groups of octahedra inserted in a tridimensional network of (FBa 4 ) tetrahedra. Location of oxygen and fluorine atoms is discussed with the help of bond valence calculations.