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On some crystallized sulphates from the province of Huelva, Spain

Published online by Cambridge University Press:  14 March 2018

Henry F. Collins
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Extract

The occurrence of melanterite, pisanite, and chalcanthite as secondary minerals resulting from the oxidation of pyrites masses containing copper is well known. It is not so well known that other metallic sulphates are from time to time found, and a brief description of the mode of occurrence of a few of these, in addition to some details of the composition of pisanite and chalcanflSte, may be of interest.

Pisanite.—This mineral is of common occurrence at all the pyrites mines of Huelva and elsewhere, ibrming stalactites and stalagmites in those parts of the mines that are above drainage level though subject to more or less percolation of water. It is rarely found as well-formed crystals, save occasionally when a pool ef strong sulphate water has been temporarily dammed hack in some way, and then supersaturated through evaporation.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 20 , Issue 100 , March 1923 , pp. 32 - 38
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1923

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References

Page 33 note 1 This analysis, like all those that follow, was made by R. Serrano, a Spanish chemist, formerly in the employ of the Rio Tinto Co., the Huelva Copper and Sulphur Mines, and other English and French mining companies. The material was in most cases dried over sulphuric acid. Unfortunately, the effect of this treatment on the water of crystallization was not at the time appreciated. Apart from this, these hitherto unpublished analyses may be of some value.

Page 34 note 1 Including a little Al2O3 not separately determined.

Page 36 note 1 A similar occurrence of epsomito was also noticed by the author in the iron mines of Sierra Alhamilla in the province of Almeria.

Page 37 note 1 Retgers, J. W., Zeits. Physikal. Chemie, 1894, vol. 15, p. 562 Google Scholar.

Page 37 note 2 H., Leitmeier, Centralblatt Min., 1917, pp. 321–331 [Min. Abstr., vol 1, p. 347].Google Scholar