Formula: (Cu,Fe,Zn)SO4.H2O
Origin of name: for E. Poitevin, Canadian mineralogist
Crystal system: monoclinic
Crystal class: -1
Twinning:
Unit cell:
Colour: salmon
Diaphaneity:
Luster:
Habit: massive, powdery to vermiform
Hardness: 3 to 3.5
Specific gravity: 3.30
Cleavage: none
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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