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Formula: Ba2CaFe2+2Si6O17
Unclassified silicate
Specific gravity: 3.51
Hardness: 6
Streak: White
Colour: Colourless to pale yellow
Solubility: Decomposes slowly in dilute hydrochloric acid, leaving a white residue Dana
Common impurities: Al,Mn,Zn
Environments
Pellyite occurs in lenses and bands of barium silicate rocks developed
in metamorphic skarn near the contact with
granite or granodiorite.
Associated minerals include baryte,
hedenbergite, quartz,
taramellite, gillespite,
sanbornite, alforsite,
witherite and andradite
(HOM).
Localities
At the type locality, the Gun claim, Wilson Lake, Itsi Mountain, Watson Lake mining district, Yukon, Canada,
pellyite occurs in a contact metasomatic deposit adjacent
to a porphyritic quartz
monzonite stock. It occurs as a massive crystalline constituent of
skarns which have developed in original
limestone bodies adjacent to the igneous contact. The average grain
size of the pellyite is approximately 2 mm. The mineral assemblage includes pellyite,
baryte, hedenbergite,
quartz, andradite,
taramellite, gillespite,
sanbornite, chalcopyrite and
witherite
(CM 11.444-447).
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