Formula: (NH4)2Mg3H4(PO4)4 . 8H2O
Origin of name: For J. Hannay, British chemist
Crystal system: Triclinic
Crystal class: -1
Twinning:
Unit cell:
Colour: Yellowish
Diaphaneity: Transparent
Luster: Vitreous
Habit: Crystals thin prismatic, striated and elongated parallel to c-axis, small
Hardness: 1
Specific gravity: 2.03
Cleavage: 4; {001} perfect, {110}, {1-10}, and {130} poor
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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