Tags: Chemical Substance, Mineral.

Lopezite is a rare red chromate mineral with chemical formula: K2Cr2O7. It crystallizes in the triclinic crystal system.It occurs as rare vug fillings in nitrate ores in association with tarapacáite (K2CrO4) dietzeite and ulexite in the Chilean Atacama and is reported from the Bushveld igneous complex of South Africa.

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