The Composition and Structure of Jeanbandyite and Natanite

J. Betterton, D. I. Green, C. Jewson, J. Spratt and P. Tandy
21 Linkway, Edgcumbe Park, Crowthorne, Berkshire, RG45 6ES, UK
Manchester Museum, The University, Manchester, MI3 9PL, UK
Lower Carneggy Cottage, Greenbottom, Truro, Cornwall, TR4 8QL, UK
Department of Mineralogy, Natural History Museum, Cromwell Road, London, SW7 5BD, UK

Abstract: The rare iron-tin hydroxide minerals natanite and jeanbandyite occur as small pseudo-octahedral crystals in high-temperature Sn-Cu-As veins at Penberthy Croft Mine and Hingston Downs Quarry, Cornwall. The lattice parameters for jeanbandyite and natanite are reported and compared to previously calculated values. The chemical composition of jeanbandyite is discussed and a significant proportion of divalent Fe and Mn is shown to be present.

Keywords: Cornwall • jeanbandyite • natanite

Mineralogical Magazine; October 1998 v. 62; no. 5; p. 707-712; DOI: 10.1180/002646198547945
© 1998, The Mineralogical Society
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