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Formula: Ca4NaCa2Ti(Si2O7)2(OF)F2
Sorosilicate (Si2O7 groups), rinkite group of
the seidozerite supergroup,
titanium-bearing mineral
Crystal System: Triclinic
Specific gravity: 3.03 to 3.14 measured, 2.84 calculated
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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