Formula: Ca(Mg,Mn,Fe)B2O5
Origin of name: Named for Igor V. Kurchatov (1903-1960), Russian physicist
Crystal system: Orthorhombic
Crystal class: 2 2 2
Twinning:
Unit cell: a = 11.15, b = 36.4, c = 5.55
Colour: Pale gray
Diaphaneity:
Luster: Vitreous
Habit: Massive
Hardness: 4.5
Specific gravity: 3.02
Cleavage: 1; {010} perfect
Tenacity:
Streak: White
Synonyms/varieties:
Comments: Dimorphous with clinokurchatovite; fluoresces bright violet in LW
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