Powder neutron-diffraction profile analysis of zero-dimensional H-bonded crystal HCrO2

被引：29

作者：

Ichikawa, M ^{[1
]}

Gustafsson, T

Olovsson, I

Tsuchida, T

机构：

[1] Hokkaido Univ, Grad Sch Sci, Div Phys, Sapporo, Hokkaido 0600810, Japan

[2] Univ Uppsala, Angstrom Lab, S-75121 Uppsala, Sweden

[3] Hokkaido Univ, Grad Sch Engn, Div Mat Sci & Engn, Sapporo, Hokkaido 0600810, Japan

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 1999年 / 60卷 / 11期

关键词：

crystal structure; thermal expansion; neutron scattering;

D O I：

10.1016/S0022-3697(99)00189-4

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Powder neutron-diffraction profile analysis of alpha-HCrO2 has been done at five temperatures, 295, 210, 140, 70 and 10 K, to confirm the space group and the hydrogen-bond distance. The data were analyzed for three models: (1) space group R(3) over bar m with off-centered disordered hydrogen; (2) R(3) over bar m with centered hydrogen; and (3) R3m. The space group R(3) over bar m with off-centered disordered hydrogen gave the most reasonable results in the range of 70-295 K, consistent with earlier results. The hydrogen bond distance 2.471(3) Angstrom at 295 K agrees with one of the earlier studies. The space group at 10 K is less conclusive. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：1875 / 1880

页数：6

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