lópezite

Also known as lopezite

Lópezite is a rare red chromate mineral with chemical formula: K2Cr2O7. It crystallizes in the triclinic crystal system.

Key facts

Mineral.name: Lópezite
Mineral.image: Potassium dichromate (synthetic).jpg
Mineral.imagesize: 260px
Mineral.category: Sulfate minerals (chromate)
Mineral.formula: K2Cr2O7
Mineral.IMAsymbol: Lpz
Mineral.strunz: 7.FD.05
Mineral.dana: 35.2.1.1 Anhydrous chromates
Mineral.system: Triclinic
Mineral.class: Pinacoidal () (same H-M symbol)
Mineral.symmetry: P
Mineral.color: Orange-red, red
Mineral.habit: Granular or spherical in small crystals on the natural environment. Prismatic on lab grown crystals.
Mineral.cleavage: Perfect[010] perfect, [100] distinct, [001] distinct
Mineral.luster: Vitreous
Mineral.streak: Light yellow
Mineral.diaphaneity: Transparent
Mineral.gravity: 2.69

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Wikidata facts

Image: Potassium dichromate (synthetic).jpg

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Nickel-Strunz 9th edition (updated 2009): 7.FD.05
Nickel-Strunz '10th ed', review of (9th ed/ 2009 update): 7.FD.05
Commons category: Lópezite
chemical formula: K₂Cr₂O₇
IMA Mineral Symbol: Lpz
Strunz 8th edition (series ID, updated): VI/E.03

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Lópezite 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. Lópezite was first described in 1937 for an occurrence in Iquique Province, Chile and named after Chilean mining engineer Emiliano López Saa (1871–1959).