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The structure of junitoite, CaZn2Si2O2 · H2O

Published online by Cambridge University Press:  05 July 2018

R. D. Hamilton  and
J. J. Finney
R. D. Hamilton
Affiliation:
Department of Geology, Colorado School of Mines, Golden, Colorado 80401, USA
J. J. Finney
Affiliation:
Department of Geology, Colorado School of Mines, Golden, Colorado 80401, USA
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Abstract

Junitoite, CaZn2Si2O7·H2O, is orthorhombic, space group Area2, with a = 12.510, b = 6.318, c = 8.561 Å, Z = 4. The structure, determined on the basis of three-dimensional Mo-Kα intensity data for 745 reflections refined to R = 0.10. The structure consists of ZnO4 tetrahedral chains along b joined by Si2O4 groups along a and c to form a three-dimensional network. Ca occurs in distorted CaO5(H2O) octahedra. The structure shows similarities to hemimorphite and Ca-Zn silicates but represents a unique tetrahedral framework.

Keywords

crystal structurejunitoite
Type
Research Article
Information
Mineralogical Magazine , Volume 49 , Issue 350 , March 1985 , pp. 91 - 95
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1985 

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