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Mineralpedia Details for Yanomamite

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Yanomamite

Yanomamite

Formula
InAsO4ยท2H2
Crystal System
Orthorhombic 
Cleavage
Indistinct, None, None 
Luster
Vitreous (Glassy) 
Color
blue green, light green, light yellow green 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Hardness
5.5-6 
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Yanomamite from Mangabeira Tin deposit, Monte Alegre de Goiás, Goiás, Brazil

Yanomamite
            from Mangabeira Tin deposit,  Monte Alegre de Goiás, Goiás, Brazil
Special Info
Type Locality

A small specimen but with rich coverage of this light blue indium arsenate. There are several tiny rosette crystals. This is the type and only locality.  Yanomamite represents the only indium arsentate and is one of twelve know minerals containing essential indium. Jeepers!

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