Alarsite

A variety of Minerals

Alarsite specimen - rock identification

What is Alarsite?

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. It was reported from fumaroles in the Tolbachik volcano, Kamchatka, Far Eastern Region, Russia. It occurs in association with fedotovite, klyuchevskite, lammerite, nabokoite, atlasovite, langbeinite, hematite and tenorite.

Alarsite Market Value Calculator

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Alarsite Localities Map

See where Alarsite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.

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North ZoneCentral RidgeSouth Basin

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Quick Facts

Physical Properties

Color
Colorless, with pale tints of yellow, green, blue due to inclusions
Hardness (Mohs)
5 - 5.5
Density
3.32 g/cm³
Streak
White

Chemical Properties

Chemical Formula
AlAsO4
Elements
Al, As, O
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