Formula: Sb4O4(OH)2(SO4)
Origin of name: For K. Klebelsberg, Hungarian educator
Crystal system: Orthorhombic
Crystal class: mm2
Twinning:
Unit cell: a = 11.28 Ǻ, b = 14.91 Ǻ, c = 5.765 Ǻ
Colour: Pale to dark yellow, yellow-orange
Diaphaneity:
Luster:
Habit: Crystals acicular, in tufts
Hardness: 3.5 to 4
Specific gravity: 4.62
Cleavage: None
Tenacity: Brittle
Streak:
Synonyms/varieties:
Comments:
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