Ganomalite from Franklin, New Jersey, and Jakobsberg, Sweden: new chemical and crystallographic data | Mineralogical Magazine | Cambridge Core (original) (raw)
Abstract
Chemical analyses for ganomalite from Franklin, New Jersey, and Jakobsberg, Nordmark, Sweden, imply that Mn is an essential element and that the formula is Pb9Ca5MnSi9O33, with Z = 1 for the hexagonal unit cell. Preliminary crystal structure data confirm that Mn and Ca are ordered, as implied by the chemical analyses. Ganomalite is hexagonal, space group P3, with a = 9.82 and c = 10.13 Å. Occurrences of samples from both localities are described, together with analytical data for macedonite from Jakobsberg.
Keywords
Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1985
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