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Mineralpedia Details for Moctezumite

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Moctezumite

Moctezumite

Named after the type locality, and only locality, at the Moctezuma mine in Sonora, Mexico. Moctezumite is a rare mineral that occurs only in the Moctezuma mine in the oxidized portion of the hydrothermal gold-tellurium deposits. Moctezumite occurs in association with schmitterite, burckhardtite, zemannite, emmonsite, pyrite, barite, and limonite. Moctezumite is strongly radioactive.

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

Formula
Pb(UO2)(Te4+O3)2 
Crystal System
Monoclinic 
Cleavage
Perfect, None, None 
Color
orange, dark orange, brownish orange 
Class
Monoclinic - Prismatic 
Hardness
WebMineral
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Mindat
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Moctezumite from Moctezuma mine, Moctezuma, Sonora, Mexico

Moctezumite
            from Moctezuma mine, Moctezuma, Sonora, Mexico

Orange bladed crystals to aboput 0.75mm lying flat on matrix.

Click thumbnail images for larger view.

Moctezumite from Moctezuma mine, Moctezuma, Sonora, Mexico

Moctezumite
            from Moctezuma mine, Moctezuma, Sonora, Mexico

Well-formed, free standing, orange, platy crystals of very rare Moctezumite in an aggregate measuring about 1mm.

Click thumbnail images for larger view.

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