Formula: AlAsO4 . 2H2O
Origin of name: For G. Mansfield, American geologist
Crystal system: Orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell:
Colour: White to pale gray
Diaphaneity: Transparent crystals
Luster: Vitreous
Habit: Fibrous crusts; porous masses
Hardness: 3.5 to 4
Specific gravity: 3.031
Cleavage: 3; {201} imperfect, {001} and {100} trace
Tenacity:
Streak:
Synonyms/varieties:
Comments: Series with scorodite
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