Ordoñezite

ordonezite

tridymite

montmotillonite

sanidine

Images

Formula: ZnSb5+2O6
Antimonate, byströmite group
Specific gravity: 6.635
Hardness: 6½
Streak: Greenish grey
Colour: Light to dark brown, colourless to pearl grey, light yellowish to dark olive
Common impurities: Al,Si
Environments:

Hydrothermal environments

Localities

At the type locality, the Santín Mine, Cerro de las Fajas, Santa Catarina, Santa Catarina Municipality, Guanajuato, Mexico, ordoñezite occurs in small cassiterite-bearing veinlets in rhyolite associated with cassiterite, cristobalite, tridymite, quartz, montmorillonite, hyalite, hematite, sanidine, topaz and fluorite (AM 40.64-69, Mindat, HOM).

At El Antimonio, Caborca Municipality, Sonora, Mexico, ordoñezite is associated with byströmite, chenevixite and malachite (HOM).

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