Formula: NaFe(AsO4)F
Origin of name: For C. Maxwell, American geologist
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: Dark red
Diaphaneity: Transparent
Luster: Vitreous
Habit: Blocky to short prismatic euhedral to subhedral crystals to 1 mm long, aggregates to 3 mm
Hardness: 5 to 5.5
Specific gravity: 3.90
Cleavage: 1; {110} good
Tenacity:
Streak: Red-orange
Synonyms/varieties:
Comments: Series with durangite and tilasite
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