Formula: NaCa2(Mg,Fe)4FeSi6Al2O22(OH)2
Origin of name: From magnesium and hastingsite
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: Green
Diaphaneity: Semitransparent
Luster: Vitreous
Habit: Crystals, prismatic
Hardness: 5 to6
Specific gravity: 3.18 to 3.22
Cleavage: 3; {110} perfect, {001} and {100} partings
Tenacity:
Streak:
Synonyms/varieties:
Comments: Series with hastingsite
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