Haidingerite

Formula: CaHAsO4 . H2O

Origin of name:   For W. von Haidinger, Austrian mineralogist

 

Crystal system:   Orthorhombic

Crystal class:  2/m 2/m 2/m

Twinning:

Unit cell:

 

Colour:  Colourless, white

Diaphaneity:  Transparent to translucent

Luster:  Vitreous to adamantine, pearly on cleavage

Habit:  Crystals short prismatic or equant; fibrous; botryoidal, fine-grained

Hardness:  2 to 2.5

Specific gravity:  2.95

Cleavage:  1; {010} perfect

Tenacity:

Streak:

 

Synonyms/varieties:

 

Comments:

 

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