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(Zn,Al)3(Si,Al)2O5(OH)4
Monoclinic
Fraipontite, a zinc aluminum silicate hydroxide mineral of the clay group, was described from Sterling Hill by Cianciulli (1995a) as 1 mm clusters of 0.1 mm, yellow-to-brown, flattened crystals with pearly luster, on a slip surface in franklinite-willemite-calcite ore apparently from the 340 level. Semi-quantitative microprobe analysis by the writer yielded approximate metal ratios for Zn:Mg:Fe:Mn = 66:27:5:2. Fraipontite has not been reported from Franklin.
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| Copyright © 1995 by Pete J. Dunn |
Website
by Herb Yeates
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Link
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This
page created: January 14, 2001 |
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