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Communications from the Oxford Mineralogical Laboratory. On the constitution of the natural Arsenates and Phosphates

Published online by Cambridge University Press:  14 March 2018

E. G. J. Hartley
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Extract

This mineral, which until now has been regarded as a hydrated arsenate of iron, was mentioned as far back as 1790 by Proust and also by other mineralogists about the same time. In 1801 Chenevix (Phil. Trans. 1801, 220) gave an analysis of an arsenate of iron, but it differs very much in composition from pharmacosiderite in that it contained 9 per cent. of copper. Probably it was not a pure specimen of this mineral. Vauquelin also published an analysis of an iron arsenate which was probably pharmacosiderite (Brongniart, Traité de Min., 1807, II. 182), since he describes it as crystallising in cubes.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 12 , Issue 56 , October 1899 , pp. 152 - 158
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1899

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