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Minerals - Wallisite | TerraCollect
Mineral - Wallisite
Wallisite
PbTl(Cu,Ag)Asâ‚‚Sâ‚…
Chemical Properties
Mineral Class
Sulfides and sulfosalts
Toxicity
middle
Formula
PbTl(Cu,Ag)Asâ‚‚Sâ‚…
Unit Cell
a=9,22 b=8,52 c=7,98 α=55° β=62° γ=69° Z=2
Physical Properties
Hardness
3 - 3.5
Streak
brown
Density
Optical Properties
Color
black
gray
Birefringence
/
Luster
Metallic
Transparency
opaque
Pleochroism
Geomineralogical Properties
Crystal System
triclinic
Point Group
Composition
Elements
Mass
Pb
25,2
Tl
26,0
Cu
6,9
Ag
2,7
As
20,5
S
19,0
Schweiz
Groups and Members
Wallisit-Gruppe
Cleavage
Gut nach {001}
Fracture
nd
Tenacity
Brittle
Space Group
Habit
coarse,
granular,
massive,
prismatic
Formation
hydrothermale Bildung in Dolomit
Paragenesis
Twinning
Rarity
Very rare
Synonyms
Wallisite
