Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
22.56-2.60
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Uneven, ConchoidalWalter Schumann
Cleavage
Imperfect on {001}, indistinct on {011}
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
Mohs Hardness
2.5-36-6.5
2
10
👆🏻
Chemical Composition
PbWO4
Plagioclase Feldspar s: (Na,Ca)Al1-2Si3-2O8 Orthoclase Feldspar : KAlSi3O8