The disordered crystal structures of Zn(CN)2 and Ga(CN)3

被引：100

作者：

Williams, DJ ^{[1
]}

Partin, DE ^{[1
]}

Lincoln, FJ ^{[1
]}

Kouvetakis, J ^{[1
]}

O'Keeffe, M ^{[1
]}

机构：

[1] Arizona State Univ, Dept Chem, Tempe, AZ 85287 USA

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1997年 / 134卷 / 01期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1006/jssc.1997.7571

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The structure of Zn(CN)(2) has been reexamined using neutron time-of-flight diffraction and has been determined to have symmetry Pn (3) over bar m, a=5.9227 (1) Angstrom at 14 K and 5.8917 (1) Angstrom at 305 K (negative thermal "expansion"). The CN groups are disordered in contrast to the ordered arrangement with symmetry p4 (3) over bar m assumed in earlier X-ray diffraction experiments. Zn is tetrahedrally surrounded with average Zn-(C,N)=1.9697(3) and C-N=1.1897(1) Angstrom. Ga(CN)(3) has been examined for the first time, X-ray powder diffraction shows it to have a cubic Prussian blue framework structure, symmetry Pm (3) over bar m, a=5.295(2) Angstrom, also with CN disorder. Ga is octahedrally surrounded with average Ga-(C, N) distance=2.072(2) Angstrom and C-N=1.148(1) Angstrom. (C) 1997 Academic Press.

引用

页码：164 / 169

页数：6

共 18 条

[1]

BERTAUT EF, 1968, INT TABLES XRAY CRYS, V2

[2] Synthetic routes to Ga(CN)(3) and MGa(CN)(4) (M=Li, Cu) framework structures [J].