Formula: CuAl6(PO4)4(OH)8.4H2O
Origin of name: from French for Turkish
Crystal system: triclinic
Crystal class: -1
Twinning:
Unit cell: a = 7.49 Å, b = 9.95 Å, c = 7.69 Å, a = 111.7°, b = 115.4°, g = 69.4°
Colour: blue to green, greenish blue
Diaphaneity:
Luster: vitreous, waxy, dull
Habit: crystals short prismatic, small, rare, massive, dense, cryptocrystalline to fine-granular, concretionary, stalactitic
Hardness: 5 to 6
Specific gravity: 2.6 to 2.8
Cleavage: 2; {001} perfect, {010} good
Tenacity: conchoidal to smooth
Streak:
Synonyms/varieties: agaphite, callaina, henwoodite, johnite
Comments: series with chalcosiderite and with planerite
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