Al₂GeO₄(OH)₂

Author(s)

C. L. Lengauer, E. Tillmanns, J. Zemann, J. L. Robert

Abstract

The structure of Al₂GeO₄(OH)₂[C2/c; a = 5.4197(3) Å, b = 8.2464(3) Å, c = 9.3187(3) Å, ß = 110.933(3); Z = 4] was refined by X-ray Rietveld methods. It contains GeO₄ tetrahedra having all four O atoms in common with an AlO₂OH framework built from AlO₄(OH)₂ octahedra sharing three edges. The H atom could be located only approximately. The coordinations of the atoms are mostly as in topaz, Al₂SiO₄(F, OH)₂, and its synthetic OH endmember, but the arrangement of the oxygen atoms is that of a distorted cubic close-packing, while in topaz it is based on a close-packing of the type ABAC.

Organisation(s)

Department of Mineralogy and Crystallography

External organisation(s)

Laboratoire de Météorologie Physique (LaMP), Centre National De La Recherche Scientifique (CNRS)

Journal

Zeitschrift fur Kristallographie - New Crystal Structures

Volume

210

Pages

656-661

No. of pages

6

ISSN

1433-7266

Publication date

09-1995

Peer reviewed

Yes

Austrian Fields of Science 2012

105116 Mineralogy, 105113 Crystallography

ASJC Scopus subject areas

General Materials Science, Condensed Matter Physics, Inorganic Chemistry

Portal url

https://ucrisportal.univie.ac.at/en/publications/143c18f0-7f22-4b8e-8f5d-4e0a3c075ae2