Formula: Fe 3-xFex(PO4)2(OH)x . (8-x) H2O
Origin of name: From Greek meta - after and vivianite
Crystal system: Triclinic
Crystal class: 1 or -1
Twinning:
Unit cell:
Colour: Leek-green
Diaphaneity: Opaque to transparent
Luster:
Habit: Crystals prismatic, minute, elongated parallel to c-axis
Hardness: 1.5 to 2
Specific gravity: 2.69
Cleavage: 1; {110} perfect
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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