Babylon NG
Simply the best definition!

Download it's free


Wikipedia English The Free Encyclopedia

Download this dictionary
Alarsite (AlAsO4) is an aluminium  arsenate mineral with its name derived from its composition: aluminium and arsenate. It occurs as brittle subhedral grains which exhibit trigonal symmetry. It has a Mohs hardness of 5-5.5 and a specific gravity of 3.32. It is semitransparent, colorless with pale yellow tints and shows a vitreous luster. It is optically uniaxial (+) with refractive indices of nω = 1.596 and nε = 1.608.

See more at

© This article uses material from Wikipedia® and is licensed under the GNU Free Documentation License and under the Creative Commons Attribution-ShareAlike License

Mineralogy Database Dictionary

Download this dictionary

General Information:
 Chemical Formula:
(Molecular Weight = 165.90 gm)
Aluminum 16.26 % Al
Arsenic 45.16 % As
Oxygen 38.58 % 
 Empirical Formula:
A product of fumarolic exhalations.
 IMA Status:
Approved IMA (Dana # Added)
TL: The Tolbachik Main fracture eruption, Kamchatka, Russia.
 Name Origin:
Named from its chemical composition of Aluminum and Arsenic.
Physical Properties:
colorless, yellowish, pale green, or bluish.
3.32 - 3.35, Average = 3.33
Encrustations - Forms crust-like aggregates on matrix., Anhedral Grains - Granular minerals without the expression of crystal shapes,
3 - Calcite
Vitreous (Glassy)
More details...

| Alarsite in Italian | Alarsite in Latvian | Alarsite in Farsi