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Mineralpedia Details for Marthozite

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Marthozite

Marthozite

Named in honor of Aime Marthoz, a former Director of the Union Miniere de Haut-Katanga in what is now the Democratic Republic of the Congo. Marthozite is a rare mineral that is found as an “alteration product of selenian digenite in the oxidation zone of a uranium-bearing Co-Cu deposit at its type locality from the Musonoi Co-Cu mine in the Democratic republic of the Congo. Other localities for Marthozite include in Switzerland and the Czech Republic.

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

Formula
Cu2+(UO2)3(Se4+O3)2O2ยท8H2
Crystal System
Orthorhombic 
Crystal Habit
Bladed 
Cleavage
Perfect, Indistinct, None 
Color
greenish brown, yellow green 
Class
Orthorhombic - Pyramidal 
Hardness
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Marthozite from Musonoi mine, Kolwezi, Shaba Cu belt, DR of Congo

Marthozite
            from Musonoi mine, Kolwezi, Shaba Cu belt, DR of Congo

Superb, well-formed orthorhombic olive green micro crystals. This is an excellent specimen with a 2x1cm vug packed with crystals and associated with a little Guillemite.

1mm excellent crystal textbook Marthozite crystal in vug.

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