Rösslerite

Formula: Mg(AsO3OH).7H2O

Origin of name: for Karl Rössler, Germany

 

Crystal system: monoclinic

Crystal class: 2/m

Twinning:

Unit cell: 

 

Colour: colourless, white

Diaphaneity: transparent

Luster: vitreous to dull

Habit: crystals short prismatic, small, rare, crusts fine grained or fibrous

Hardness: 2 to 3

Specific gravity: 1.93

Cleavage: 1; {111} imperfect

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments: 

 

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