TerraCollect
Terra
Collect
Minerals
Fossils
Rocks
Localities
Blogs
Log in
Login
Sign in with Google
Loading data...
Minerals - Orpiment | TerraCollect
Mineral - Orpiment
Orpiment
As₂S₃
Show all 9 images
Links
Chemical Properties
Mineral Class
Sulfides and sulfosalts
Toxicity
high
Formula
As₂S₃
Unit Cell
a=11.48 b=9.58 c=4.26 β=90.41° Z=4
Physical Properties
Hardness
1.5 - 2
Streak
yellow
green yellow
Density
Optical Properties
Color
red
orange
yellow
orange red
Birefringence
0.620
Luster
Greasy,
Pearly
Transparency
translucent,
transparent,
opaque
Pleochroism
Geomineralogical Properties
Crystal System
Composition
Elements
Mass
As
60,90
S
39,10
Peru
Map-Layer
Geological Map
Satellite Map
Normal (2-3,5)
Cleavage
Perfect after {010}
Fracture
Tenacity
Brittle,
Inelastic-flexible
monoclinic
Point Group
Space Group
Habit
blocky,
crusty,
prismatic,
Rhombohedron,
tabular
Formation
In hydrothermal ore deposits Volcanic in fumaroles Secondary as an alteration product of realgar
Paragenesis
Twinning
Contact twins after {100}
Rarity
Common
Synonyms
Orpiment
