Cerianite-(Ce) Mineral Data

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General Cerianite-(Ce) Information

Help on Chemical  Formula: Chemical Formula: (Ce++++,Th)O2
Help on Composition: Composition: Molecular Weight = 195.09 gm
   Cerium   53.86 %  Ce   63.09 % Ce2O3
   Thorium  29.73 %  Th   33.83 % ThO2
   Oxygen   16.40 %  O
           ______        ______ 
           100.00 %       96.92 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ce0.75Th0.25O2
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1955
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Synonym: Synonym: ICSD 72155
  PDF 43-1002
 

Cerianite-(Ce) Image

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Cerianite-(Ce)

Comments: Black crystal of cerianite-(Ce) on matrix.
Location: Ettringer Bellerberg, Ettringen, near Mayen, Eifel Mts, Rhineland-Palatinate, Germany. Scale: Picture size 1.2 mm.
© Thomas Witzke / Abraxas-Verlag

Cerianite-(Ce) Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 5.42, Z = 4; V = 159.22 Den(Calc)= 8.14
Help on Crystal System: Crystal System: Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F m3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.124(1), 1.913(0.51), 1.632(0.44),
Click Here for Large Cerianite-(Ce) Structure Window Crystal Structure:

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Wyckoff R W G , Crystal Structures , 1 (1963) p.239-444, Second edition. Interscience Publishers, New York, New York, Fluorite structure

 

Physical Properties of Cerianite-(Ce)

Help on Color: Color: Greenish yellow, Resin brown, Dark greenish brown.
Help on Density: Density: 7.216
Help on Diaphaniety: Diaphaniety: Translucent
 

Optical Properties of Cerianite-(Ce)

Help on Optical Data: Optical Data: NCalc= 2.2 - from Gladstone-Dale relationship (KC = 0.1474) where Ncalc=Dcalc*KC+1
NCalc= 2.06 - from Gladstone-Dale relationship (KC = 0.1474) where Ncalc=Dmeas*KC+1
 

Calculated Properties of Cerianite-(Ce)

Help on Electron Density: Electron Density:

relectron=6.84 gm/cc
note: rCerianite-(Ce) =8.14 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00007
Boson Index = 0.99993
Help on Photoelectric: Photoelectric:

PECerianite-(Ce) =1,039.87 barns/electron
U=PECerianite-(Ce) x relectron=7,115.47 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 533,226.08 (Gamma Ray American Petroleum Institute Units)

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

Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 10 cm box) 57.04 ± 14.26 grams of pure Cerianite-(Ce) .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 5704.3 ±1426.1 grams of pure Cerianite-(Ce) .

Estimated Radioactivity from Cerianite-(Ce) - strong
Specimen
Size
Weight/Volume
(Sphere)
*
Calculated
Activity
Bequerols
(Bq)
Calculated
Activity
Curies (Ci)
Estimated
Activity
GR(api)
Estimated
Exposure
(mRem**)/hr
If Held in Hand
For One Hour
1000 gm / 6.17 cm 13,320,854 3.60E-04 533,226.08 175.31
100 gm / 2.86 cm 1,332,085 3.60E-05 53,322.61 17.53
10 gm / 1.33 cm 133,209 3.60E-06 5,332.26 1.75
1 gm / 6.17 mm 13,321 3.60E-07 533.23 0.18
0.1 gm / 2.86 mm 1,332 3.60E-08 53.32 0.02
0.01 gm / 1.33 mm 133 3.60E-09 5.33 0.00
0.001 gm / 0.62 mm 13 3.60E-10 0.53 0.00

Weight of pure Cerianite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 8.14 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
 

Cerianite-(Ce) Classification

Help on  Dana Class: Dana Class: 4.4.12.1 (4)Simple Oxides
  (4.4)with a cation charge of 4+ (A++++ O2)
  (4.4.12)Dana Group
 
4.4.12.1 Cerianite-(Ce) (Ce,Th)O2 F m3m 4/m 3 2/m
Help on  Strunz Class: Strunz Class: IV/D.31-40 IV - Oxides
  IV/D - Oxides with metal : oxygen = 1:2 (MO2 and related compounds)
  IV/D.31 - Badleyite - Uraninite series
 
IV/D.31-10 Baddeleyite ZrO2 P 21/c 2/m
 
IV/D.31-20 Tazheranite CaTiZr2O8 F m3m 4/m 3 2/m
 
IV/D.31-30 Calzirtite CaZr3TiO9 P bca 2/m 2/m 2/m
 
IV/D.31-35 Hiarneite! (Ca,Mn,Na)2(Zr,Mn)5(Sb,Ti,Fe)2O16 I 41/acd 4/m 2/m 2/m
 
IV/D.31-40 Cerianite-(Ce) (Ce,Th)O2 F m3m 4/m 3 2/m
 
IV/D.31-50 Thorianite ThO2 F m3m 4/m 3 2/m
 
IV/D.31-60 Uraninite UO2 F m3m 4/m 3 2/m
 

Other Cerianite-(Ce) Information

Help on References: References: PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Cerianite-(Ce) :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - Uranium Minerals 13 - WWW-MINCRYST 14 -École des Mines de Paris

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Cerianite-(Ce)

(Ce++++,Th)O2
Dana No: 4.4.12.1 Strunz No: IV/D.31-40
Locality:

 

Notes:

 

 
   
 
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