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Stratigraphical etch patterns on the rhombohedral cleavages of natural quartz crystals
Published online by Cambridge University Press: 05 July 2018
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.
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- Research Article
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- Copyright © The Mineralogical Society of Great Britain and Ireland 1973
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