β-SrNH and β-SrND -: Synthesis and crystal structure determination by X-ray and neutron powder diffraction

被引：0
|
作者：
Schultz-Coulon, V [1 ]
Irran, E [1 ]
Putz, B [1 ]
Schnick, W [1 ]
机构：
[1] Univ Munich, Inst Anorgan Chem, D-81377 Munich, Germany
来源：
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE | 1999年 / 625卷 / 07期
关键词：
strontium imide; neutron powder diffraction; crystal structure;
D O I：
10.1002/(SICI)1521-3749(199907)625:7<1086::AID-ZAAC1086>3.0.CO;2-B
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
By reaction of strontium with NH3 in a flow tube at 750 degrees C a novel modification of strontium imide, beta-SrNH, was obtained as a dark yellow powder. According to X-ray powder diffractometry und crystal structure determination by direct methods beta-SrNH and beta-SrND adopt a highly distorted variant of the NaCl type of structure (Pnma, a = 757.70(1), b = 392.260(4), c = 569.652(9) pm, Z = 4, wR(p) = 0.098, R-p = 0.075, R-F = 0.044). Temperature dependent neutron powder diffraction of beta-SrND revealed the position of the D atoms which in contrast to alpha-SrND are crystallographically ordered. At higher temperatures beta-SrNH transforms to alpha-SrNH.
引用
收藏
页码：1086 / 1092
页数：7
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