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Formula: Pd4Sb3
Alloy of antimony and palladium
Crystal System: Tetragonal
Specific gravity: 7.264 calculated
Colour: Dark grey
Environments
Volcanic igneous environments
Metamorphic environments
Localities
At the type locality, the Mesamax Northwest deposit, Ungava Peninsula, Nunavik, Nord-du-Québec, Québec, Canada,
ungavaite occurs as grains in heavy-mineral concentrates derived from drill-core from
ultramafic rocks, associated with monoclinic
pyrrhotite, pentlandite,
chalcopyrite, galena,
sphalerite, cobaltite, a
chlorite group mineral and
magnetite. Associated precious-metal minerals include
naldrettite, sperrylite,
sudburyite, michenerite, a
gold-silver alloy,
altaite, petzite and
hessite. Ungavaite occurs as rare anhedral grains with inclusions
of the alloy or with attached chalcopyrite and the
chlorite group mineral.
Grains of ungavaite vary in size from about 36 to 116 mm, with an average of 73 mm. It appears bright creamy
white in association with pentlandite,
pyrrhotite, the
chlorite group mineral and
chalcopyrite
(CM 43.1735-1744).
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