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Formula: (Ca,Sr,Na)6-x(Nb,Ti)6(Si4O12)(O,OH,F)16.nH2O
Hydrated cyclosilicate (ring silicate), strontium-,
niobium- and titanium- bearing
mineral
Crystal System: Orthorhombic
Specific gravity: 3.0 measured, 3.16 calculated
Hardness: 1½ to 2
Streak: White
Colour: Pale rose to light yellow
Common impurities: Ti,Al,Fe,Mn,Na,K
Environments
Plutonic igneous environments
Pegmatites
Localities
At the Ilímaussaq complex, Kujalleq, Greenland, Na-dominant komarovite occurs as light yellowish,
transparent, lamellar aggregates and are needle- or lath- like. The authors point out that the mineral corresponds
to “natrokomarovite”, a name that has not been approved by the CNMMN; komarovite is supposedly Ca-dominant
(AM 88.931–935).
At the type locality, Natrolite Stock, Karnasurt Mountain, Lovozersky District, Murmansk Oblast, Russia,
komarovite occurs in alkalic rocks associated with late albite and
redeposited fine-grained natrolite. It is foliated, platy, filling
fractures in natrolite. It is filmed by hydrous
manganese oxides
(AM 57.1311-1317).
The mineral was named in honour of Vladimir Mikhaylovich Komarov, Soviet test pilot, engineer, and cosmonaut. He was
the 14th person in space and the first cosmonaut to travel twice into space. He died on re-entry due to a failed
parachute in 1967.
(Mindat).
Komarovite from Karnasurt Mountain -
Image
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