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Carminite and beudantite from the northern part of the Lake District and from Cornwall

Published online by Cambridge University Press:  14 March 2018

Arthur W. G. Kingsbury  and
J. Hartley
Arthur W. G. Kingsbury
Affiliation:
Dept. of Mineralogy, University Museum, Oxford
J. Hartley
Affiliation:
Dept. of Geology, University of Leeds
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Summary

The parageneses are given of ten new occurrences of carminite [PbFe2(AsO4)2(OH)2] and eleven of beudantite [PbFe3AsO4SO4(OH)6] in Cornwall and Cumberland, with an account of the alteration of carminite to beudantite and of beudantite to plumbojarosite or to beaverite.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 32 , Issue 249 , June 1960 , pp. 423 - 432
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1960

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References

page 423 note 1 Russell, A., Min. Mag ., 1910, vol. 15, p. 255.Google Scholar

page 423 note 2 Kingsbury, A. W. G., Trans. Roy. Geol. Soc, Cornwall, 1954, vol. 18, part 4 (for 1952), p. 395 Google Scholar.

page 423 note 3 Ibid., p. 392.

page 425 note 1 Dana, Syst. Min., 7th edn, vol. 2, p. 556.;

page 426 note 1 Simpson, E. S., Journ, Roy. Soc. Western Australia, 1938, vol. 240, p. 110.Google Scholar

page 426 note 2 Syst. Min., 7th edn, vol. 2, p. 1002.

page 426 note 3 Bull. Soc. Franç. Min. Crist., 1952, vol. 75, p. 70 [M.A. 12-68].

page 427 note 1 Butler, and Schaller, , Journ. Wash. Ac. Sci., 1911, vol. 1, p. 26; Amer. Journ. Sci., 1911, ser. 4, vol. 32, p. 418.Google Scholar

page 427 note 2 See also Kingsbury, A. W. G. and Hartley, J., Min. Mag., 1956, vol. 31, p. 289, and 1957, vol. 31, p. 700.Google Scholar

page 427 note 3 In Grains Gill several east-west 'lead-veins' also heave and shift to the left the main' granite' veins; later quartz-carbonate veins cross and heave them to the right.

page 428 note 1 Driven alongside the vein where it outcrops and crosses the Dry Gill beck.

page 431 note 1 Kingsbury, A. W. G., Trans. Roy. Geol. Soc. Cornwall, vol. 18, part 4 (1952), p. 396 Google Scholar. A sample of this material, examined shortly after collection, was shown to be zeunerite, with n 1.608±0.001 and giving X-ray powder-pattern spacings almost identical with those for synthetic hydrous zeunerite given by Weiss-Frondel, J. in Amer. Min., 1951, vol. 36, p. 252 Google Scholar, and distinct from those of meta-zeuncrite with 5-8 H2O.

page 431 note 2 Representative specimens of most of the above occurrences have been given to the Department of Mineralogy, British Museum (Natural History).