Phaunouxite

Formula: Ca3(AsO4)2.11H2O

Origin of name: after locality Phaunoux, the French name for the valley

 

Crystal system: triclinic

Crystal class: -1

Twinning: 

Unit cell: 

 

Colour: colourless

Diaphaneity: 

Luster: vitreous

Habit: crystals acicular, to 1.5 mm, in fan-shaped groups

Hardness

Specific gravity: 2.28

Cleavage: none

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments: 

 

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