General Information:
Chemical Formula:
AlAsO4
Composition:
(Molecular Weight = 165.90 gm)
Aluminum 16.26 % Al
Arsenic 45.16 % As
Oxygen 38.58 % O
Empirical Formula:
Al(AsO4)
Environment:
A product of fumarolic exhalations.
IMA Status:
Approved IMA (Dana # Added)
Locality:
TL: The Tolbachik Main fracture eruption, Kamchatka, Russia.
Name Origin:
Named from its chemical composition of Aluminum and Arsenic.
Physical Properties:
Cleavage:
None
Color:
colorless, yellowish, pale green, or bluish.
Density:
3.32 - 3.35, Average = 3.33
Diaphaniety:
Transparent
Habits:
Encrustations - Forms crust-like aggregates on matrix., Anhedral Grains - Granular minerals without the expression of crystal shapes,
Hardness:
3 - Calcite
Luminescence:
Non-fluorescent.
Luster:
Vitreous (Glassy)
Streak:
white
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