Sampleite

Formula: NaCaCu5(PO4)4Cl.5H2O

Origin of name: for Mat Sample, mine superintendent at Chuquicamata, Chile

 

Crystal system: orthorhombic

Crystal class: unknown

Twinning:

Unit cell: 

 

Colour: light blue to greenish blue

Diaphaneity: 

Luster: pearly on {010}

Habit: crystals lath-like, very thin, spheroidal aggregates

Hardness: about 4

Specific gravity: 3.20

Cleavage: 3; {010} perfect, {100} and {001} good

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments: 

 

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