Parabrandtite

Formula: Ca₂Mn(AsO₄)₂.2H₂O

Origin of name: from Greek para = similar and brandtite

Crystal system: triclinic

Crystal class: 1 or -1

Twinning:

Unit cell: 

Colour: colourless

Diaphaneity: transparent

Luster: vitreous

Habit: crystals prismatic, striated parallel to elongation in aggregates 0.5 to 1.5 mm

Hardness: 2.5 to 3

Specific gravity: 3.55

Cleavage: 2; {010} and {110} perfect

Tenacity: 

Streak: 

Synonyms/varieties:

Comments: dimorphous with brandtite