Purpurite

Formula: MnPO4

Origin of name: from Latin purpura = purple

 

Crystal system: orthorhombic

Crystal class: 2/m 2/m 2/m

Twinning: 

Unit cell: 

 

Colour: deep rose to reddish purple, dark brown to brown from alteration

Diaphaneity: subtranslucent to opaque

Luster: dull to satiny

Habit: massive

Hardness: 4 to 4.5

Specific gravity: 3.64 to 3.69

Cleavage: 2; {100} good, {010} imperfect

Tenacity: 

Streak: reddish purple

 

Synonyms/varieties:

 

Comments: series with heterosite

 

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