tetragonal Tungstates
Scheelite
CaWO4
Quick Facts
Hardness
4.5
Specific Gravity
5.9
Refractive Index
1.918
Optical Character
Uniaxial +
Crystal Structure
#! Species: Scheelite
#! System: Tetragonal (4/m)
#! Habit: Dipyramidal with strong fluorescence
tetragonal[4/m]:{112}@1.0 + {011}@0.7 + {001}@0.4
tetragonal
4/m
{112} {011} {001}
Physical Properties
Crystal Systemtetragonal
Hardness (Mohs)4.5
Specific Gravity5.9
CleavageDistinct {101}, poor {112}
FractureSubconchoidal to uneven
LustreVitreous to adamantine
Optical Properties
Refractive Index1.918
Birefringence0.016-0.017
Optical CharacterUniaxial +
Dispersion0.026
PleochroismNone
FluorescenceStrong blue-white (SWUV) - diagnostic
Colours
ColorlessWhiteYellowOrangeBrownPale green
Localities
ChinaBrazilCalifornia (USA - Pine Creek)AustriaKoreaBolivia
Crystal Forms
dipyramidpinacoidpseudo-octahedral
Notes
Trace molybdenum shifts fluorescence to yellowish-green; important tungsten ore
Interactive Preview
Open this crystal in the CDL Playground to rotate, export, and explore in 3D.
Open in Playground #! Species: Scheelite
#! System: Tetragonal (4/m)
#! Habit: Dipyramidal with strong fluorescence
tetragonal[4/m]:{112}@1.0 + {011}@0.7 + {001}@0.4
Related Minerals
Other minerals in the tetragonal system
