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Minerals - Picromerite | TerraCollect
Mineral - Picromerite
Picromerite
K₂Mg(SO₄)₂ · 6H₂O
Chemical Properties
Mineral Class
Sulphates
Toxicity
none
Formula
K₂Mg(SO₄)₂ · 6H₂O
Unit Cell
a=9,66 b=8,80 c=5,29 β=107° Z=4
Physical Properties
Hardness
2.5
Streak
white
Density
Normal (2-3,5)
Optical Properties
Color
white
gray
colorless
Birefringence
Luster
Vitreous,
Earthy
Transparency
translucent,
transparent,
opaque
Pleochroism
Geomineralogical Properties
Crystal System
Composition
Elements
Mass
SO₃
30,74
MgO
10,40
Kâ‚‚O
23,28
Cl
0,28
Hâ‚‚O
26,87
Deutschland
Groups and Members
Picromerit-Gruppe
Cleavage
Auf (201) perfekt
Fracture
Tenacity
monoclinic
Point Group
Space Group
Habit
blocky,
coarse,
massive,
prismatic,
Rhombohedron,
columnar,
tabular
Formation
Evaporit, Sedimentär, Vulkanisch in Fumarolen
Paragenesis
Twinning
Rarity
Rarely
Synonyms
Picromerite
