Regularly interstratified dioctahedral mica-smectite from Roseki deposits in Japan
- 1 March 1981
- journal article
- Published by Mineralogical Society in Clay Minerals
- Vol. 16 (1) , 91-102
- https://doi.org/10.1180/claymin.1981.016.1.07
Abstract
XRD, DTA, IR, chemical and electron microscopic data are presented for three specimens of regularly interstratified 25 Å minerals from Roseki deposits in Japan. The layer charges of these dioctahedral mica-smectites originate mainly from tetrahedral Al-for-Si substitution. The non-expandable interlayers are occupied by relatively large amounts of Ca and K as well as Na. The expansion characteristics of the expandable interlayers are montmorillonitic in spite of the beidellitic composition of the 2:1 layers.Keywords
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