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PbCO3
Orthorhombic
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| Figure 23-19. Crystal drawing of cerussite from Sterling Hill. Drawing is from Palache (1935) who provided crystallographic data. | ||
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Cerussite, a lead carbonate mineral, was reported by Palache (1935) who illustrated the fine crystals found at Sterling Hill (Figures 23-19 and 23-20). Cerussite has not been reported from Franklin. Few observations have been made; no chemical or physical data exist. Bostwick (1982) reported a moderate yellow fluorescence in longwave ultraviolet.
The reported crystalline cerussite from Sterling Hill occurs as an alteration of galena. Other occurrences are known but not with certainty from the same paragenesis; these contain shards of titanite and an amphibole similar to hastingsite. Crystals from Sterling Hill, found within altered galena adjacent to the east limb in 1992, are up to 1 cm in size.
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Figure 23-20. Crystal drawings of cerussite. The drawing at left is of a twinned crystal from Sterling Hill. The drawings at right are two projections (A and B) of one crystal fragment. Drawings are from Palache (1935) who provided crystallographic data. |
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| Copyright © 1995 by Pete J. Dunn |
Website
by Herb Yeates
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Link
to homepage
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This
page created: January 11, 2001 |
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