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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