Metavariscite

Formula:  AlPO₄ ^. 2H₂O

Origin of name:  From Greek meta - after and variscite

Crystal system:  Monoclinic

Crystal class:  2/m

Twinning:  On {102}, contact

Unit cell: a = 5.18 Å, b = 9.51 Å, c = 8.45 Å, β = 90.4°

Colour:  Pale-green

Diaphaneity: 

Luster:  Vitreous

Habit:  Crystals thin to thick tabular, minute, slightly elongated or equant, rarely long prismatic; massive, granular

Hardness:  ~ 3.5

Specific gravity:  2.54

Cleavage:  1; {010}

Tenacity:  Brittle

Streak:  White

Synonyms/varieties:  Clinovariscite

Comments:  Dimorphous with variscite