Formula: (NH4)Fe3(SO4)2(OH)6
Origin of name: From ammonium ion and jarosite
Crystal system: Hexagonal
Crystal class: -3 2/m
Colour: Yellow
Diaphaneity: Transparent
Habit: Irregular flattened nodules of microscopic tabular grains
Hardness: 3.5-4.5
Specific gravity: 3.03
Cleavage: None
Streak: Light yellow
Synonyms/varieties:
Comments:
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