tetragonal Tungstates
Wulfenite
PbMoO4
Quick Facts
Hardness
2.5
Specific Gravity
6.7
Refractive Index
2.28
Optical Character
Uniaxial -
Crystal Structure
#! Species: Wulfenite
#! System: Tetragonal (4/m)
#! Habit: Thin tabular square plates
tetragonal[4/m]:{001}@1.0 + {101}@0.4
tetragonal
4/m
{001} {101}
Physical Properties
Crystal Systemtetragonal
Hardness (Mohs)2.5
Specific Gravity6.7
CleavageDistinct {101}
FractureSubconchoidal to uneven
LustreAdamantine to resinous
Optical Properties
Refractive Index2.28
Birefringence0.12-0.122
Optical CharacterUniaxial -
Dispersion0.203
PleochroismVery weak to none
Colours
Bright orangeOrange-redRedYellowBrownish-orange
Localities
Arizona (USA - Red Cloud Mine, Rowley Mine)Mexico (Los Lamentos)MoroccoSlovenia (Mezica)Australia
Crystal Forms
pinacoiddipyramidtabular crystals
Notes
RI over refractometer limit; exceptionally high dispersion; too soft and fragile for jewelry
Interactive Preview
Open this crystal in the CDL Playground to rotate, export, and explore in 3D.
Open in Playground #! Species: Wulfenite
#! System: Tetragonal (4/m)
#! Habit: Thin tabular square plates
tetragonal[4/m]:{001}@1.0 + {101}@0.4
Related Minerals
Other minerals in the tetragonal system
