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Formula: Sr2(CO3)2
Anhydrous carbonate, forms a series with paralstonite,
strontium-bearing mineral
Crystal System: Trigonal
Specific gravity: 3.650 to 3.682 measured, 3.66 calculated
Hardness: 3
Streak: White
Colour: White
Common impurities: TR,La,Ce
Environments
Olekminskite occurs in barytocalcite –
quartz veins in intrusive
breccia, associated with
paralstonite, calcite,
baryte, ankerite,
ancylite-(Ce),
narsarsukite,
sphalerite and galena
(HOM).
Localities
At the type locality, the Kedrovyi alkaline massif, Murunskii Massif, Chara and Tokko Rivers Confluence,
Aldan Shield, Russia, olekminskite forms needlelike crystals, 0.005 to 0.010 mm thick, occurring in
spherulitic aggregates 0.10 to 0.15 mm in radius. The crystals are round to hexagonal in cross section; their
centres are enriched in calcium and barium, and the rims in
strontium. Olekminskite occurs in
barytocalcite –
quartz veins of 5 to 10 cm width that cut intrusive
breccia. Associated minerals include
calcite, baryte, and
ankerite that replaced
barytocalcite
(AM 78.450-455)'
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