Images
Formula: CaZrO3
Oxide, perovskite subgroup,
perovskite supergroup
Crystal System: Orthorhombic
Specific gravity: 4.587 calculated
Hardness: 8 to 9
Streak: Light brown to cream-white
Colour: Red-brown to yellowish and almost colourless
Common impurities: Sc,Cr,Fe,Ce,La,Hf,Nb,U,Th
Environments
Localities
At the type locality, Xenolith no. 1, Lakargi Mountain, Upper Chegem volcanic caldera, Baksan Valley,
Kabardino-Balkaria, Russia, lakargiite was discovered as an accessory mineral in high-temperature
skarns in carbonate-silicate rocks occurring as xenoliths in
ignimbrite. Lakargiite forms pseudo-cubic crystals
up to 30–35 µm in size and aggregates up to 200 µm, associated with
spurrite, larnite,
calcio-olivine,
calcite, cuspidine,
rondorfite,
reinhardbraunsite,
wadalite, perovskite
and minerals of the ellestadite group. The new
perovskite mineral belongs to the ternary solid solution
lakargiite - perovskite -
megawite.
Lakargiite crystallised under
sanidinite facies conditions of
contact metamorphism characterised by very high
temperatures and low pressures
(AM 93.1903-1910).
Lakargiite from Lakargi Mountain - Image
Back to Minerals