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Stratigraphical etch patterns on the rhombohedral cleavages of natural quartz crystals

Published online by Cambridge University Press:  05 July 2018

M. S. Joshi  and
Baby K. Paul
M. S. Joshi
Affiliation:
Department of Physics, Sardar Patel University, Vallabh Vidyanagar, Gujarat State, India
Baby K. Paul
Affiliation:
Department of Physics, Sardar Patel University, Vallabh Vidyanagar, Gujarat State, India
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Summary

Rhombohedral cleavage faces of quartz have been etched hydrothermally and with fused KOH. Stratigraphical etch patterns were observed on isolated cleavages, matched cleavage faces, and opposite sides of a thin flake. The angle between the () cleavage plane and the planes responsible for the stratigraphical patterns was almost equal to the interfacial angle, 46° 16′ between adjacent rhombohedral faces. It is concluded that the stratigraphical patterns formed by preferential etching reveal the edges of weak planes deposited during growth. The implications are discussed.

Information

Type
Research Article
Information
Mineralogical Magazine , Volume 39 , Issue 304 , December 1973 , pp. 482 - 487
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1973

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