Formula: AlFe4(SO4)6(OH,O)2.20H2O
Origin of name: From aluminum and copiapite
Crystal system: Triclinic
Crystal class: -1
Unit cell: a = 7.251 Å, b = 18.161 Å, c = 7.267 Å, a = 93.983°, b = 102.283°, g = 97.966°
Colour: Yellowish
Diaphaneity: Transparent to translucent
Habit: Massive; as thin crusts and coatings
Hardness: 2.5-3
Specific gravity: 2.16
Cleavage: None
Streak: Light yellow
Synonyms/varieties:
Comments:
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