CRYSTAL-STRUCTURE OF NA3PB2(BEF4)3F, A FLUOROBERYLLATE WITH APATITE STRUCTURE

被引：5
作者：
ENGEL, G [1 ]
FISCHER, U [1 ]
机构：
[1] UNIV KARLSRUHE,INST KRISTALLOG,W-7500 KARLSRUHE,GERMANY
来源：
JOURNAL OF THE LESS-COMMON METALS | 1990年 / 158卷 / 01期
关键词：
Crystals--Structure - Fluorine Compounds--Structure;
D O I：
10.1016/0022-5088(90)90438-P
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Na3Pb2(BeF4)3F crystallizes with the apatite type. The structure was refined in the hexagonal space group P63/m; a = 953.1(3) pm, c = 702.8(2) pm; Z = 2 formula units. The large cations are ordered as follows: position 4f is occupied exclusively by Na+, whereas four Pb2+ and two Na+ are distributed statistically in position 6h. The F(4) atom in the channel of the structure does not occupy position 0,0, 1 4 on the mirror plane but is disordered. It lies with the same probability 67 pm above or below this plane (half-occupied position 4e with z = 0.345). © 1990.
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页码：123 / 130
页数：8
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