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Wakefieldite-(Ce) Mineral Data

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General Wakefieldite-(Ce) Information

Help on Chemical  Formula: Chemical Formula: (Ce+++,Pb++,Pb++++)VO4
Help on Composition: Composition: Molecular Weight = 281.89 gm
   Cerium    29.82 %  Ce   34.93 % Ce2O3
   Vanadium  18.07 %  V    32.26 % V2O5
   Lead      29.40 %  Pb   23.75 % PbO /  8.49 % PbO2
   Oxygen    22.70 %  O
            ______        ______ 
            100.00 %       99.43 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ce0.6Pb0.3Pb0.1(VO4)
Help on Environment: Environment: Found in the oxidation zone.
Help on IMA Status: IMA Status: Approved IMA 1977
Help on Locality: Locality: Kusu deposit, 85 km SW of Kinshasa, Zaire. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Renamed from kusuite in 1977 for the locality, changed to wakefieldite-Ce as the Ce analog of wakefieldite-Y.
Help on Name Pronunciation: Name Pronunciation: Wakefieldite-(Ce) + Pronunciation Say WAKEFIELDITE-(CE)
Help on Synonym: Synonym: ICSD 202425
  PDF 29-398

Wakefieldite-(Ce) Image

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Comments: Bluish black crystal of wakefieldite-(Ce) on matrix.
Location: Yellow Lake, Olala, British Columbia, Canada. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Wakefieldite-(Ce) Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.88224
Help on Cell Dimensions: Cell Dimensions: a = 7.354, c = 6.488, Z = 4; V = 350.88 Den(Calc)= 5.34
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: I 41/amd
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.678(1), 2.766(0.9), 1.891(0.7),

Physical Properties of Wakefieldite-(Ce)

Help on Cleavage: Cleavage: None
Help on Color: Color: Dark red, Black.
Help on Density: Density: 4.76
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Square - Occurs as square crystals in shape or outline.
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Vitreous - Adamantine
Help on Streak: Streak: rusty brown

Optical Properties of Wakefieldite-(Ce)

Help on Dichroism (w): Dichroism (w): yellow.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.048 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.066 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1873,KPDmeas= 0.2101,KC= 0.2005
Ncalc = 1.95 - 2.07
Help on Optical Data: Optical Data: Uniaxial (?), b=2.

Calculated Properties of Wakefieldite-(Ce)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.14 gm/cc
note: Specific Gravity of Wakefieldite-(Ce) =4.76 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.06
Boson Index = 0.94
Help on Photoelectric: Photoelectric: PEWakefieldite-(Ce) = 680.98 barns/electron
U=PEWakefieldite-(Ce) x relectron=2,819.60 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 27,671.42 (Gamma Ray American Petroleum Institute Units)
Concentration of Wakefieldite-(Ce) per GRapi unit = 36.14 (PPM)

Wakefieldite-(Ce) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Radioactivity from Wakefieldite-(Ce) - weak
Curies (Ci)
If Held in Hand
For One Hour
1000 gm / 7.38 cm 668,047 1.81E-05 27,671.42 9.10
100 gm / 3.42 cm 66,805 1.81E-06 2,767.14 0.91
10 gm / 1.59 cm 6,680 1.81E-07 276.71 0.09
1 gm / 7.38 mm 668 1.81E-08 27.67 0.01
0.1 gm / 3.42 mm 67 1.81E-09 2.77 0.00
0.01 gm / 1.59 mm 7 1.81E-10 0.28 0.00
0.001 gm / 0.74 mm 1 1.81E-11 0.03 0.00

Weight of pure Wakefieldite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.76 gm/cc.*
Goverment Estimate of Average Annual Exposure ( 360 mRem) **
Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem
Estimated Thorium Activity ( 1.49 % Th) From Sum REE Elements (29.82 % REE)

Wakefieldite-(Ce) Classification

Help on  Dana Class: Dana Class: (38)Anhydrous Phosphates, etc
  (38.04)A+ XO4
  (38.04.11)Zenotime Group (Tetragonal: I41/amd) Xenotime-(Y) YPO4 I 41/amd 4/m 2/m 2/m Chernovite-(Y) YAsO4 I 41/amd 4/m 2/m 2/m Wakefieldite-(Y) YVO4 I 41/amd 4/m 2/m 2/m Wakefieldite-(Ce) (Ce,Pb,Pb)VO4 I 41/amd 4/m 2/m 2/m Pretulite! ScPO4 I 41/amd 4/m 2/m 2/m Xenotime-(Yb)! YbPO4 I 41/amd 4/m 2/m 2/m Wakefieldite-(La)! LaVO4 I 41/amd 4mm Wakefieldite-(Nd)! NdVO4 I 41/amd 4mm
Help on  Strunz Class: Strunz Class: 08.AD.35 08 - PHOSPHATES, ARSENATES, VANADATES
  08.A - Phosphates, etc. without additional anions, without H2O
  08.AD -With only large cations
08.AD.35 Dreyerite BiVO4 I 41/amd 4/m 2/m 2/m
08.AD.35 Chernovite-(Y) YAsO4 I 41/amd 4/m 2/m 2/m
08.AD.35 Pretulite! ScPO4 I 41/amd 4/m 2/m 2/m
08.AD.35 Xenotime-(Y) YPO4 I 41/amd 4/m 2/m 2/m
08.AD.35 Wakefieldite-(Ce) (Ce,Pb,Pb)VO4 I 41/amd 4/m 2/m 2/m
08.AD.35 Wakefieldite-(Y) YVO4 I 41/amd 4/m 2/m 2/m
08.AD.35 Xenotime-(Yb)! YbPO4 I 41/amd 4/m 2/m 2/m
08.AD.35 Wakefieldite-(La)! LaVO4 I 41/amd 4mm
08.AD.35 Wakefieldite-(Nd)! NdVO4 I 41/amd 4mm

Other Wakefieldite-(Ce) Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Wakefieldite-(Ce) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 08.AD.35





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