Leogangite

FormulaCu10(AsO4)4SO4(OH)6·8H2O

Origin of name: For the locality, Danielstollen mining area, and Inschlagalm area, Schwarzleo Valley, about 10 km from Leogang, Salzburg, Austria

 

Crystal system: Monoclinic

Crystal class: 2/m

Twinning: 

Unit cell: a = 21.770, b = 12.327, c = 10.720, β = 92.85°

 

Colour: Green with bluish tint

Diaphaneity: Transparent

Luster: Vitreous

Habit: Platy aggregates up to 1 mm

Hardness: Not measured

Specific gravity: 3.55

Cleavage: {100} perfect

Tenacity: Partings parallel to (010) and (001), brittle

Streak: Light green

 

Synonyms/varieties:

 

Comments: 

 

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