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Orpiment
Sulphide group
Formule chimique :
As2S3
Système cristallin :
Monoclinic
Etymologie :
From the Latin "Auri" meaning "Gold" and "Pigmentum" meaning "Colour
Dureté :
1.5 – 2
Densité :
3.4 – 3.5
Propriétés physiques :
Resinous to pearly luster, orange, brown to yellow, transparent to translucent, perfect cleavage
Propriétés chimiques :
soluble in basic solution and aqua regia (mixture of concentrated hydrochloric acid and nitric acid)
Formule chimique :
As2S3
Habitus :
prismatic or kidney-shaped aggregates
Gîtologie :
Orpiment is characteristic of low temperature hydrothermal deposits
Determination :
Easy because of its almost systematic association with the realgar
Utilisation :
no significant use
(No Ratings Yet)
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