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Mineralpedia Details for Hemihedrite

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Hemihedrite

Hemihedrite

Named in reference to the mineral’s hemihedral morphology as exhibiting only half the faces required for complete crystallographic symmetry. Hemihedrite is a rare mineral that can be found only in localities in the United States in Arizona and Nevada, and an additional locality in the Esfahan Province of Iran. Hemihedrite forms from the oxidation of galena, sphalerite, and pyrite in hydrothermal lead-bearing veins.

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

Formula
ZnPb10(CrO4)6(SiO4)2F2 
Crystal System
Triclinic 
Luster
Vitreous (Glassy) 
Color
orange, brown, black 
Streak
saffron 
Class
Triclinic - Pinacoidal 
Hardness
WebMineral
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Mindat
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Hemihedrite from Pack Rat claim, Maricopa Co., Arizona, United States

Hemihedrite
            from Pack Rat claim, Maricopa Co., Arizona, United States

Bright orange, crude crystals of Hemiherdite to about 0.75 mm associated with darker red Phoenicochroite crystals, also crude in vugs 5-6mm across.

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Hemihedrite from Florence Lead-Silver mine, Pinal Co., Arizona, United States

Hemihedrite
            from Florence Lead-Silver mine, Pinal Co., Arizona, United States

Bright orange micro crystals to about 0.75mm. Joe Ruiz collection.

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Hemihedrite from Wickenberg, Maricopa Co., Arizona, United States

Hemihedrite
            from Wickenberg, Maricopa Co., Arizona, United States
Special Info
Phillips Collection

Euhedral orange crystals to about 0.75 - 1mm of Hemihedrite. 

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