期刊
ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE CRYSTAL ENGINEERING AND MATERIALS
卷 72, 期 -, 页码 626-633出版社
INT UNION CRYSTALLOGRAPHY
DOI: 10.1107/S2052520616008064
关键词
ammonium; ionic radii; bond valence model
A set of effective ionic radii corresponding to different coordination numbers (CNs) and compatible with the radii system by Shannon [Acta Cryst. (1976), A32, 751-767] has been derived for ammonium: 1.40 angstrom (CN = IV), 1.48 angstrom (CN = VI), 1.54 angstrom (CN = VIII) and 1.67 angstrom (CN = XII). The bond-valence parameters r(0) = 2.3433 angstrom and B = 0.262 angstrom have been determined for ammonium-fluorine bonds.
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