Bafertisite

sorosilicate

Bayan Obo

Formula: Ba2Fe2+4Ti2(Si2O7)2O2F2
Sorosilicate, forms a series with hejtmanite
Specific gravity: 3.96 to 4.27
Hardness: 5
Streak: White
Colour: Red, yellowish-red, light brown
Environments:

Plutonic igneous environments

Bafertisite occurs in alkaline igneous rocks such as alkali granite and alkali syenite, or in rocks associated with them (Dana, Webmin).

At the type locality, the Bayan Obo deposit, Baotou League, Inner Mongolia, China, bafertisite occurs in hydrothermal veins associated with aegirine, fluorite, baryte and bastnäsite (Dana, AM 45.754, HOM).

At the Burpala massif, Russia, bafertisite occurs in a dike of microcline granite - aplite (Dana, HOM).

Common impurities: Al,Nb,Mg,Ca,K,Na,F,Cl

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