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On a crystal of augelite from California

Published online by Cambridge University Press:  14 March 2018

M. A. Peacock  and
D. A. Moddle
M. A. Peacock
Affiliation:
University of Toronto
D. A. Moddle
Affiliation:
Ontario Department of Mines
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Extract

Augelite was originally described from Sweden by Blomstrand (1868) who obtained the composition 2Al2O3.P2O5.3H2O from a massive mineral with cleavage in three directions. No further description of this inadequately defined mineral appeared until Prior and Spencer (1895) gave their complete and exact characterization of well-crystallized material from Machacamarca, department Potosi, Bolivia, supplemented by observations by Spencer (1898, 1907) on further finds at Tatasi, department Potosi, and at Oruro, Bolivia.

Lemmon (1935) first recognized augelite as cleavage masses in the commercial deposit of andalusite at White Mountain, Mono County, California, and gave determinative observations which established the identity of the mineral. In this locality Kerr (1932) had noted corundum, diaspore, pyrophyllite, alunite, lazulite, and rutile, associated with the andalusite. In addition to these minerals Professor Joseph Murdoch of the University of California at Los Angeles, has found small, white, tabular crystals of apatite in a specimen carrying augelite. Crystals of augelite from this deposit, with a number of new forms, were mentioned by Pough (1936) in an inconspicuous notice which we did not see until our work was nearly done.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 26 , Issue 175 , December 1941 , pp. 105 - 115
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1941

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References

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