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On Chlormanganokalite a new Vesuvian mineral : with notes on some of the associated minerals

Published online by Cambridge University Press:  14 March 2018

H. J. Johnston-Lavis
Affiliation:
Vulcanology in the Royal University of Naples
L. J. Spencer
Affiliation:
Mineral Department of the British Museum

Extract

In ‘Nature’ of May 31, 1906, the senior author gave a preliminary account of a new Vesuvian mineral, which he had found amongst the products of the eruption of April 1906, and for which he proposed tile name chlormanganokalite. It was described as a hydrous chloride of manganese and potassium, occurring as deliquescent crystals apparently rhombohedral in form. A few days later, on June 5, 1906, Professor A. Laeroix described, before the French Academy of Sciences, a Vesuvian mineral which he thought must be identical with chlormanganokalite : he stated it to be an anhydrous chloride of manganese, potassium, and sodium, and he determined the deliquescent crystals to be monoclinic and psehdo-rhombohedral. In a later paper, Professor Lacroix rightly insists upon this identity.

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1908

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References

Page 54 note 1 Johnston-Lavis, H. J., ‘A new Vesuvian mineral.’ Nature, 1906, vol. lxxiv, pp. 103104.CrossRefGoogle Scholar

Page 54 note 2 Lacroix, A., ‘Les cristaux de sylvite des blocs rejetés par la récente éruption du Vésuve.’ Comptes Rendus Acad. Sci. Paris, 1906, vol. cxlii, pp. 12491252.Google Scholar

Page 54 note 3 Lacroix, A., ‘Les minéraux des fumerolles de l'éruption du Vésuvc en avril 1906.’ Bull. Soc. franç. Min., 1907, vol. xxx, pp. 219266.Google Scholar

Page 54 note 4 Johnston-Lavis, H. J., ‘On the fragmentary ejectamenta of volcanoes.’ Proc. Geol. Assoc., 1886, vol. ix, pp. 421432, with plate.CrossRefGoogle Scholar

Page 59 note 1 Loc. cit., 1906.

Page 59 note 2 Johnston-Lavis, H. J., ‘Anothcr new Vesuvian mineral.’ Nature, June 21, 1906, vol. lxxiv, p. 174.CrossRefGoogle Scholar

Page 59 note 3 Loc. cit., 1907, p. 212.

Page 60 note 1 Zambonini, F., ‘Notizie mineralogiche sull' eruzione Vesuviana dell' Aprile 1906.’ Atti R. Accad. Sci. Napoli, 1906, Mem. vol. xiii, pp. 140.Google Scholar

Page 60 note 2 Barker, T. V., Min. Mag., 1907, vol. xiv, p. 247 Google Scholar ; this vol., p. 48.

Page 60 note 3 Crystals of haematite of a scalenohedral habit appear to be of rare occurrence. In the British Museum collection there are two such crystals ‘from an island in the Red Sea’ ; the larger crystal is nearly 3 cm. in longth, and the predominating form is ε {132̅} = {235̅2}.