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Scheelite

IMA-Approved Mineral Species


Properties and Data
Physical Properties
Composition
CaWO4
Chemical Name
Calcium Tungstate
Molecular Weight
287.915 g/mol
Density
6.1 g/cm3
Mohs Hardness
4.5 - 5
Member of
Scheelite Group
Crystal System
Tetragonal
Optical Properties
Type
Uniaxial (+)
Refractive Index
nω = 1.918 - 1.921
nε = 1.935 - 1.938
Dispersion Factor
0.026
Birefringence
δ = 0.016 - 0.017

Additional Properties
Scintillescent
Peak: ? (Teal)
Output: ? ph/MeV
Additional Information
Material articles have temporarily been disabled for renewal and polishing.
Variants and Types
Intrinsic
Intrinsic
Color: Colorless
Er:CaWO4
Er:CaWO4
Color: Colorless
Cause: Erbium Ions
Eu:CaWO4
Eu:CaWO4
Color: Amber to Vermillion
Cause: Europium Ions
Pr:CaWO4
Pr:CaWO4
Color: Pale Green, Pale Yellow
Cause: Praseodymium Ions
Production and Synthesis
Czochralski Method
Czochralski Method
Involves pulling a crystal (boule) upward from a molten solution. Produces some of the purest crystals but requires a cleanroom environment.
References
REFERENCES





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