Formula: Sr(Sr,Ca,Ba)(CO3)2
Origin of name: after locality Olekminsk, Siberia, Russia
Crystal system: hexagonal
Crystal class: 32
Twinning:
Unit cell:
Colour: white
Diaphaneity: transparent
Luster: vitreous
Habit: needle-like crystals in sperulitic aggregates to 0.15 mm
Hardness: 3
Specific gravity: 3.70
Cleavage: none
Tenacity:
Streak:
Synonyms/varieties:
Comments: series with paralstonite
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