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Formula: SbNbO4
Multiple oxide, cervantite group, forms a series with
stibiotantalite, antimony- and
niobium- bearing mineral
Crystal System: Orthorhombic
Specific gravity: 5.68 measured, 5.72 calculated
Hardness: 5½
Streak: Light yellow, yellow-brown
Colour: Dark brown to light yellowish brown; reddish yellow, reddish brown, greenish yellow
Common impurities: Ta
Environments
Stibiocolumbite occurs as an accessory mineral in complex granite
pegmatites
(Webmin).
Localities
At the type locality, the Himalaya mine, Gem Hill, Mesa Grande Mining District, San Diego County, California, USA,
stibiocolumbite is a rare accessory mineral in the complex
granite pegmatites.
Associated minerals include rubellite,
beryl and lepidolite
(HOM, Dana).
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