On the chemical classification of the mica group. I. The acid micas
- 1 June 1925
- journal article
- Published by Mineralogical Society in Mineralogical Magazine and Journal of the Mineralogical Society
- Vol. 20 (109) , 305-318
- https://doi.org/10.1180/minmag.1925.020.109.01
Abstract
In a discussion of the composition of glauconite, it was shown that the analyses of this substance can be represented in terms of simple molecular proportions, provided that the mineral is regarded as a mixture of a silicate containing the group R2O3 with a similar compound in which one equivalent of R2O8 is replaced with one equivalent of RO; the general formula being R2O. 4(R2O3, RO). 10SiO2. nH2O.Work on the sedimentary iron ores collected during the preparation of the ‘Special Reports on Mineral Resources’, recently issued by the Geological Survey, made it necessary to review the composition of some of the chlorites ; but no evidence of similar replacement was found among the better-known minerals of that group.Keywords
This publication has 2 references indexed in Scilit:
- On Glauconite from the Greensand near Lewes, Sussex; the constitution of GlauconiteMineralogical Magazine and Journal of the Mineralogical Society, 1922
- On an occurrence of Minerals at Haddam Neck, Connecticut, U.S.A. (With Plate IV.)Mineralogical Magazine and Journal of the Mineralogical Society, 1902