Mammothite

Formula:  Pb6Cu4AlSb(SO4)2Cl4O2(OH)16

Origin of name:  From locality; Mammoth mine, near Tiger, Arizona, USA

 

Crystal system:  Monoclinic

Crystal class:  2/m

Twinning: 

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Colour:  Bright blue

Diaphaneity: 

Luster:  Vitreous

Habit: 

Hardness:  3

Specific gravity:  5.25

Cleavage:  1; {010}

Tenacity: 

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