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A chromian hydrogrossular from Jordanów, Lower Silesia, Poland

Published online by Cambridge University Press:  05 July 2018

W. Heflik  and
W. Żabiński
W. Heflik
Affiliation:
Department of Mineralogy and Petrography, Academy of Mining and Metallurgy, Cracow, Poland
W. Żabiński
Affiliation:
Department of Mineralogy and Petrography, Academy of Mining and Metallurgy, Cracow, Poland
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Summary

A new variety of garnet, a chromian hydrogrossular, has been found in a loose block of diopside-albite rock in a quarry of serpentinite in Jordanów, Lower Silesia. Its chemical formula is given. Although the water content of this garnet barely exceeds 1 %, the X-ray, thermal, infra-red spectrophotometric, and optical examinations give evidence that this water, in the form of (OH)4 groupings, substitutes for the SiO4 tetrahedra. The chromian hydrogrossular from Jordanów belongs to the numerous calcium-rich silicates that were formed there during the process of alteration of serpentinites by lime-rich hydrothermal solutions.

Information

Type
Research Article
Information
Mineralogical Magazine , Volume 37 , Issue 286 , June 1969 , pp. 241 - 243
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1969

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References

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