Images
Formula: ZnSb5+2O6
Antimonate,
byströmite group
Crystal System: Tetragonal
Specific gravity: 6.635 measured, 6.657 calculated
Hardness: 6½
Streak: Greenish grey
Colour: Light to dark brown, colourless to pearl grey, light yellowish to dark olive
Common impurities: Al,Si
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).
Back to Minerals