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The identity of minervite and palmerite with taranakite

Published online by Cambridge University Press:  14 March 2018

F. A. Bannister  and
G. E. Hutchinson
F. A. Bannister
Affiliation:
Mineral Department, British Museum
G. E. Hutchinson
Affiliation:
Yale University
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Extract

The abundance of the well-known potassium aluminium silicate minerals, orthoclase, microcline, and muscovite, stands in striking contrast with the rarity of the little-known potassium aluminium phosphate minerals. The only one of these which occurs as distinct crystals and which has yielded a satisfactory formula is minyulite, KAl2(PO4)2(OH,F).4H2O. This mineral was first described by E. S. Simpson and LeMesurier from Western Australia in 1933 and an examination of well-crystallized specimens from South Australia by L. J. Spencer et alii was published in 1943. Spencer's paper included X-ray single-crystal and powder data for minyulite. X-ray, optical, and specific gravity data were also determined at that time for a few other hydrous potassium aluminium phosphate minerals from the British Museum collections. These included palmerite from guano deposits in a large cavern, Monte Alburno, near Controne in Salerno, Italy, presented by E. Casoria who described the mineral in 1904, and taranakite from the Sugarloaves, near New Plymouth, Taranaki, New Zealand.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 28 , Issue 196 , March 1947 , pp. 31 - 35
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1947

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References

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