Images
Formula: K2Cr2O7
Anhydrous chromate
Crystal System: Triclinic
Specific gravity: 2.69 measured, 2.704 calculated
Hardness: 2½
Streak: Light yellow
Colour: Orange-red, red
Luminescence: Not fluorescent under UV
Solubility: Readily soluble in water
Environments
Lópezite is a rare secondary mineral in vugs in
massive nitrate rock
(HOM).
Localities
At the Maria Elena Mine, Oficina María Elena, María Elena, Tocopilla Province, Antofagasta, Chile, lópezite
is associated with tarapacáite,
dietzeite and ulexite
(HOM).
Lópezite from Oficina María Elena -
Image
At the type locality, Huara, Tamarugal Province, Tarapacá, Chile, lópezite occurs as ball-like aggregates, up
to 1 mm across, in nitrate rock. Associated Minerals include
tarapacáite, nitratine,
dietzeite and ulexite
(Mindat).
Lópezite from Huara - Image
Back to Minerals