Klebelsbergite

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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