Formula: SrCO3
Origin of name: after locality Strontian, Argyllshire, Scotland
Crystal system: orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning: common on {110}, usually contact, also penetration (trillings), lamellar
Unit cell: a = 5.107 Å, b = 8.414 Å, c = 6.029 Å
Colour: colourless, white, gray, yellowish, yellowish brown, greenish
Diaphaneity:
Luster: vitreous to resinous
Habit: crystals short to long prismatic, often spear-shaped or acicular, massive, bladed to fibrous, granular, concretionary
Hardness: 3.5
Specific gravity: 3.79
Cleavage: 3; {110} nearly perfect, {021} poor, {010} traces
Tenacity: subconchoidal, brittle
Streak:
Synonyms/varieties:
Comments:
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