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Formula: (Ca,Ce)(Nb,Ta,Ti)2O6
Multiple oxide, aeschynite group,
cerium-, niobium-,
tantalum- and titanium- bearing
mineral
Crystal System: Orthorhombic
Specific gravity: 5.54 calculated
Hardness: 4½ to 5
Streak: White
Colour: Orange-yellow
Luminescence: Not fluorescent with short wave or lomg wave UV, however, a quartz-lamp produces a brilliant green
fluorescence, characteristic of cerium-bearing minerals (Mindat)
Common impurities: Ta
Mildly RADIOACTIVE
Environments
Localities
At the type locality, Alpe Rosso, Orcesco, Druogno, Verbano-Cusio-Ossola Province, Piedmont, Italy. vigezzite
occurs with other niobium minerals such as
pyrochlore, columbite and
fersmite in miarolitic cavities in an
albitised pegmatite
in amphibolite and biotite
gneiss
(AM 65.811-812, HOM).
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