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Crestmoreite and riversideite

Published online by Cambridge University Press:  14 March 2018

H. F. W. Taylor
H. F. W. Taylor*
Affiliation:
Birkbeck College Research Laboratory, University of London1
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Extract

These two minerals were described by Eakle from the crystalline limestone at Crestmore, Riverside County, California. Both were shown to be hydrated monocalcium silicates, containing small amounts of P2O5, SO3, and CO2, occurred with a fibrous habit, and had closely similar optical properties. They were distinguished chiefly by the higher water content (approx. 1.3 mol.) of crestmoreite as compared with riversideite (0.5 mol.), and by the fact that the former was included directly in the calcite, whereas the latter formed veins in masses of idocrase which were contained in it. The minerals had been produced under hydrothermal conditions caused by igneous intrusions. In both cases, the primary material was believed to have been wilkeite, which is an apatite mineral with much of the phosphorus replaced by sulphur, silicon, and possibly carbon.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 30 , Issue 222 , September 1953 , pp. 155 - 165
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1953

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References

Page 155 Note 2 Eakle, A. S., Bull. Dept. Geol. Univ. California, 1917, vol. 10, no. 19, p. 327.Google Scholar [M.A. 1-20.]

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Page 164 Note 1 Taylor, H. F. W., Journ. Chem. Soc. London, 1953, p. 165.Google Scholar [M.A. 12-172.] The specimen was of crestmoreite from A. S. Eakle's collection, labelled 'riversideite', by which name it was (incorrectly) described in that paper.

Page 164 Note 2 Heller, L. and Taylor, H. F. W., Journ. Chem. Soc. London, 1951, p. 2397;CrossRefGoogle Scholar 1952, pp. 1018, 2535. [M.A. 11-471, 12-83.]