Re-investigation of clino-ferrosilite from Lake Naivasha, Kenya
Open Access
- 1 January 1965
- journal article
- Published by Mineralogical Society in Mineralogical Magazine and Journal of the Mineralogical Society
- Vol. 34 (268) , 66-70
- https://doi.org/10.1180/minmag.1965.034.268.05
Abstract
The clino-ferrosilite from the lithophysae in an obsidian from Lake Naivasha, Kenya, originally examined by Bowen (1935), has been shown to be substantially pure FeSiO3, with about 5% MnSiO3 in solid solution. It has the same space-group, P21/c, as clino-enstatite and pigeonite. The unit-cell dimensions are a = 9.718 Å, b = 9·088 Å, c = 5·239 Å, β = 108° 27′. These do not conform to the scheme proposed by Brown (1960): reasons are given why this was not unexpected.Keywords
This publication has 5 references indexed in Scilit:
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