Formula: BaCa(CO3)2
Origin of name: From Barium and calcite
Crystal system: Monoclinic
Crystal class: 2
Twinning:
Unit cell:
Colour: White, gray, yellowish, greenish
Diaphaneity: Transparent to translucent
Luster: Vitreous, resinous
Habit: Crystals prismatic or equant; massive
Hardness: 4
Specific gravity: 3.66 to 3.71
Cleavage: 2; {210} perfect, {001} imperfect
Tenacity:
Streak:
Synonyms/varieties:
Comments: Trimorphous with alstonite and paralstonite; fluoresces yellowish
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