Abstract

The crystal structure of monoclinic stannous fluoride α-SnF 2 has been refined from single-crystal X-ray data. The unit cell contains four cyclic Sn 4F 8 tetramers. The structure contains two types of Sn atoms: Sn(1) is surrounded tetrahedrally by three fluorine atoms and a lone pair, E, and Sn(2) is surrounded octahedrally by five fluorine atoms and a lone pair. The structure is examined within the framework of Galy's and Brown's models. Topological relationships to rutile are presented.

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