Scheelite Mineral Data

Scheelite Mineral Data
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General Scheelite Information

Help on Chemical Formula: Chemical Formula: CaWO4
Help on Composition: Composition: Molecular Weight = 287.93 gm
   Calcium   13.92 %  Ca   19.48 % CaO
   Tungsten  63.85 %  W    80.52 % WO3
   Oxygen    22.23 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca(WO4)
Help on Environment: Environment: A primary tunsten ore mineral commonly found in contact-metamorphic deposits, high-temperature hydrothermal veins, greisens, and granitic pegmatites.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1821
Help on Locality: Locality: Bispberg iron mine, Säter, Dalarna, Sweden Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the Swedish chemist, Karl Wilhelm Scheele (1742-1786).
Help on Name Pronunciation: Name Pronunciation: Scheelite + Pronunciation Say SCHEELITE
Help on Synonym: Synonym: Calcium Tungstate
  Cuproscheelite - mixture of scheelite + copper tungstate
  ICSD 60547
  PDF 41-1431
 

Scheelite Image

Click Here for Larger Scheelite Image in a New Browser Window Images:
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Scheelite

Comments: Orange scheelite with white mica.
Location: Pingwu, Sichuan, China. Scale: 9.5 x 9 cm.
© Fabre Minerals

Scheelite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:2.1694
Help on Cell Dimensions: Cell Dimensions: a = 5.242, c = 11.372, Z = 4; V = 312.49 Den(Calc)= 6.12
Help on Crystal System: Crystal System: Tetragonal - DipyramidalH-M Symbol (4/m) Space Group: I 41/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.1(1), 4.76(0.55), 3.072(0.3),
Help on Forms: Forms:

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Forms: ( 1 0 3) ( 1 0 1)

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Click Here for Large Scheelite Structure Window Crystal Structure:

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Hazen R M , Finger L W , Mariathasan J W E , Journal of Physics and Chemistry of Solids , 46 (1985) p.253-263, High-pressure crystal chemistry of scheelite-type tungstates and molybdates, Note: P = 0.0001 GPa, in air

View Additional jPOWD Structure files for Scheelite
[1] [2] [3] [4] [5]
 

Physical Properties of Scheelite

Help on Cleavage: Cleavage: {010} Distinct
Help on Color: Color: Colorless, White, Pale yellow, Brownish yellow, Reddish yellow.
Help on Density: Density: 5.9 - 6.12, Average = 6.01
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Columnar - Forms columns
Help on Habit: Habit: Disseminated - Occurs in small, distinct particles dispersed in matrix.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Hardness: Hardness: 4-5 - Fluorite-Apatite
Help on Luminescence: Luminescence: Fluorescent, Short UV=bright bluish white.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Scheelite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.136 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.152 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1515,KPDmeas= 0.1543,KC= 0.1786
Ncalc = 2.05 - 2.09
Help on Optical Data: Optical Data: Uniaxial (+), w=1.918-1.92, e=1.934-1.937, bire=0.0160-0.0170.
 

Calculated Properties of Scheelite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.26 gm/cc
note: Specific Gravity of Scheelite =6.01 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.09
Boson Index = 0.91
Help on Photoelectric: Photoelectric: PEScheelite = 789.14 barns/electron
U=PEScheelite x rElectron Density=4,150.96 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Scheelite is Not Radioactive
 

Scheelite Classification
Help on Dana Class: Dana Class: 48.01.02.01 (48)Anhydrous Molybdates and Tungstates
  (48.01)where A XO4
  (48.01.02)Scheelite Series
 
48.01.02.01 Scheelite CaWO4 I 41/a 4/m
 
48.01.02.02 Powellite CaMoO4 I 41/a 4/m
Help on Strunz Class: Strunz Class: 07.GA.05 07 - SULFATES (SELENATES, TELLURATES)
  07.G - Molybdates, Wolframates and Niobates
  07.GA -Without additional anions or H2O
 
07.GA.05 Fergusonite-(Ce)* (Ce,La,Y)NbO4 I 41/a 4/m
 
07.GA.05 Fergusonite-(Nd)* (Nd,Ce)(Nb,Ti)O4 I 41/a 4/m
 
07.GA.05 Fergusonite-(Y) YNbO4 I 41/a 4/m
 
07.GA.05 Stolzite PbWO4 I 41/a 4/m
 
07.GA.05 Scheelite CaWO4 I 41/a 4/m
 
07.GA.05 Powellite CaMoO4 I 41/a 4/m
 
07.GA.05 Wulfenite PbMoO4 I 41/a 4/m
 

Other Scheelite Information
Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Mason68)
Help on See Also: See Also: Links to other databases for Scheelite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Athena
6 - EUROmin Project
7 - Ecole des Mines de Paris
8 - GeoScienceWorld
9 - Glendale Community College
10 - Google Images
11 - Google Scholar
12 - Handbook of Mineralogy (MinSocAm)
13 - Handbook of Mineralogy (UofA)
14 - MinDAT
15 - Mineralienatlas (Deutsch)
16 - Online Mineral Museum
17 - QUT Mineral Atlas
18 - Ruff.Info
19 - Scandinavian mineral gallery
20 - University of Colorado - Mineral Structure Data
21 - WWW-MINCRYST

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Scheelite

CaWO4
Dana No: 48.01.02.01 Strunz No: 07.GA.05
Locality:

 

Notes: