The crystal structure of ganomalite, Pb9Ca5.44Mn0.56Si9O33

被引：8

作者：

Carlson, S

Norrestam, R

Holtstam, D

Spengler, R

机构：

[1] SWEDISH MUSEUM NAT HIST,DIV RES,DEPT MINERAL,S-10405 STOCKHOLM,SWEDEN

[2] INST ANGEW PHYS,LEHRSTUHL KRISTALLOG,D-91050 ERLANGEN,GERMANY

来源：

ZEITSCHRIFT FUR KRISTALLOGRAPHIE | 1997年 / 212卷 / 03期

关键词：

D O I：

10.1524/zkri.1997.212.3.208

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

A redetermination of the crystal structure of ganomalite, with composition Pb9Ca5.44(1)Mn-0.56(1)Si9O33, using new single crystal X-ray diffraction data is reported. Hexagonal space group symmetry P (6) over bar, with Z = 1 and unit cell parameters a = 9.8456(3) Angstrom and c = 10.1438(4) Angstrom. The refinement of a structural model based on the Pb5Ge3O11 structure, with a partially occupied manganese position, resulted in an R-value of 0.031. The arrangement of the SiO4 tetrahedra in ganomalite is an intermediate between the nasonite and pyromorphite structure, and the structure can be described as containing ''lead tunnels'' based on Pb9O21 units extending through the structure.

引用

页码：208 / 212

页数：5

共 18 条

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[Anonymous], 1974, INT TABLES XRAY CRYS, VIV

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