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Determination of the Cationic Arrangement in Sn 2 F 6 from neutron powder diffraction
Author(s) -
Ruchaud N.,
Mirambet C.,
Fournes L.,
Grannec J.,
Soubeyroux J. L.
Publication year - 1990
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.19905900118
Subject(s) - tin , cationic polymerization , neutron diffraction , crystallography , diffraction , crystal structure , materials science , bond length , x ray crystallography , type (biology) , chemistry , physics , optics , metallurgy , polymer chemistry , geology , paleontology
A structural determination of the high‐temperature form γ‐Sn 2 F 6 has been performed using neutron diffraction. This mixed fluoride exhibits the cubic ordered ReO 3 ‐type structure (Fm 3 m space group) with a = 8.321(4) Å at 497 K. The bond lengths Sn II F and Sn IV F give evidence of the presence of tin(II) in the (a) site and tin(IV) in the (b) site. A cationic ordering has also been found in the intermediate form β‐Sn 2 F 6 whose structure is related to the LiSbF 6 ‐type.
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