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Mineralpedia Details for Ramdohrite

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Ramdohrite

Ramdohrite

Name to honor German mineralogist Professor Paul Ramdohr of the University of Berlin who did extensive research on opaque ore minerals. At its type locality at Chocaya mine in Bolivia, Ramdohrite occurs in a vein of fine grained quartz likely of hydrothermal origin. Ramdohrite can also be found in the USA, Slovakia, China, Russia and other localities in association with pyrite, stannite, andorite, jamesonite, sphalerite, and quartz.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/ramdohrite.pdf

Formula
CdAg5.5Pb12Sb21.5S48 
Crystal System
Monoclinic 
Crystal Habit
Tabular, Prismatic 
Luster
Metallic 
Color
bluish black gray 
Streak
gray black 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Uneven 
Hardness
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Ramdohrite from Chocaya mine, Atocha-Quechisla dist., Potosí dept., Bolivia

Ramdohrite
            from Chocaya mine, Atocha-Quechisla dist., Potosí dept., Bolivia

Dull black thin platy or "lance-shaped" crystals to 1mm in rosettes and balls. This used to ba called Andorite VI and is much like a cadmium-rich Fizelyite.

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