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"Pyrochlore" is no longer the name of an approved mineral species.
The pyrochlore group of the
pyrochlore supergroup is a large group of minerals, mostly
primary, forming in
pegmatites and in igneous rocks
dominated by carbonate minerals.
It is an accessory mineral
in silica-poor rocks, often occurring with magnetite,
apatite and zircon.
It also accumulates in some detrital deposits.
Localities
At the Silver Crater mine, Hastings county, Ontario, Canada, pyrochlore occurs in a small
carbonatite together with
zircon crystals
(R&M 94.5.414).
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