An Unusual Chlorite as Revealed by the High Temperature X-Ray Diffractometer
- 1 December 1973
- journal article
- Published by Mineralogical Society in Clay Minerals
- Vol. 10 (2) , 71-78
- https://doi.org/10.1180/claymin.1973.010.2.02
Abstract
An unusual chlorite has been collected from amygdales in Miocene volcanic rock found at Taiheizan, Akita Prefecture, Japan. The mineral shows subtle variations from other chlorites and related minerals. These are: (a) no apparent expansion with water or ethylene glycol, (b) negligible or no collapse after NH4-saturation or heating at about 300°C, (c) a slow decrease in the basal spacing on heating from approximately 400°C to 760°C, (d) a small amount of low temperature or capillary water and (e) a DTA curve with a vermiculite-like system of peaks.The mineral is identified as a highly chloritic vermiculite with a small proportion of imperfect hydroxy interlayer.Keywords
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