Formula : NaCaCu5[Cl/(PO4)4] * 5 H2O
System: orthorhombic Hardness:4 Rarity:rare
Strunz id:VII/D.25-10 -
PHOSPHATES, ARSENATES and VANADATES
Name origin: Name after Mr. Mat Sample, Mine Superintendent for the Chile Exploration Company, Chuquicamata, Chile.
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