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On the Structure of Bismuthsesquioxide: The α, β, γ, and δ‐phase
Author(s) -
Harwig H. A.
Publication year - 1978
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.19784440118
Subject(s) - neutron diffraction , fluorite , metastability , crystallography , diffraction , materials science , phase (matter) , oxygen , powder diffraction , x ray crystallography , chemistry , crystal structure , physics , optics , organic chemistry , metallurgy
The structures of four polymorphs of Bi 2 O 3 were investigated by means of X‐ray and neutron powder diffraction. The position parameters of the oxygen atoms in α‐Bi 2 O 3 were refined. High temperature neutron diffraction shows that a complicated disorder exists in the oxygen sublattice of the fluorite related structure of the solid electrolyte δ‐Bi 2 O 3 . X‐ray diffraction data on metastable β‐Bi 2 O 3 correspond with a distorted fluorites structure with the voids in the oxygen sublattice ordered in the 〈001〉 direction. X‐ray and neutron diffraction data indicate that metastable γ‐Bi 2 O 3 is isomorphous to Bi 12 GeO 20 .