Götzenite

gotzenite

combeite

fersmanite

pectolite

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Formula: Ca4NaCa2Ti(Si2O7)2(OF)F2
Sorosilicate (Si2O7 groups), rinkite group, titanium-bearing mineral
Specific gravity: 3.03 to 3.14
Hardness: 5½ to 6
Streak: White
Colour: Very pale yellow, tan, off-white, colourless, white, colourless in thin section
Solubility: Easily soluble in hot diluted hydrochloric acid
Environments

Plutonic igneous environments
Metamorphic environments

Götzenite occurs in hornfels and marble xenoliths in alkalic igneous rocks (Webmin, Mindat).

Localities

At the Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Quebec, Canada, götzenite occurs in hornfels and marble xenoliths in an intrusive alkalic gabbro-syenite complex (HOM).

At the type locality, Mount Shaheru, Nyiragongo Volcano, Nyiragongo Territory, North Kivu, DR Congo, götzenite occurs in a nephelinite found on the wall of the extinct southern tributary of the active volcano (AM 43.790-798). It is found as prismatic crystals up to 0.5 mm long, associated with combeite (HOM, Mindat).

At the Lovozero Massif, Murmansk Oblast, Russia, götzenite is associated with aegirine, apatite, fersmanite and pectolite (HOM).

In the Azov Sea Region, Donetsk Oblast, Ukraine, götzenite is associated with cancrinite, fluorite and titanite (HOM).

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