Lopezite is a rare red chromate mineral with chemical formula: K 2 Cr 2 O 7.It crystallizes in the triclinic crystal system.. It occurs as rare vug fillings in nitrate ores in association with tarapacáite (K 2 CrO 4), dietzeite and ulexite in the Chilean Atacama and is reported from the Bushveld igneous complex of South Africa. Lopezite was first described in 1937 for an occurrence in …
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