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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 Environment: Environment: Partially absorbed inclusions of wall-rock in a dikelike zone of carbonate rock cutting nepheline syenite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1955
Help on Locality: Locality: Sudbury, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for CERium in its composition, and by analogy to thorianite and uraninite.
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 - Hexoctahedral H-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),
 

Physical Properties of Cerianite-(Ce)

Help on Color: Color: Greenish yellow, Resin brown, Dark greenish brown.
Help on Density: Density: 7.216
Help on Diaphaneity: Diaphaneity: 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: Bulk Density (Electron Density)=6.84 gm/cc
note: Specific Gravity of Cerianite-(Ce) =8.14 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0000790254
Boson Index = 0.9999209746
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 = 533,226.22 (Gamma Ray American Petroleum Institute Units)
Concentration of Cerianite-(Ce) per GRapi unit =1,875.38 (PPB)

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 13,320,856 3.60E-04 533,226.22 175.31
100 gm / 2.86 cm 1,332,086 3.60E-05 53,322.62 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: 04.04.12.01 (04)Simple Oxides
  (04.04)with a cation charge of 4+ (A++++ O2)
  (04.04.12)Dana Group
 
04.04.12.01 Cerianite-(Ce) (Ce,Th)O2 F m3m 4/m 3 2/m
Help on  Strunz Class: Strunz Class: 04.DL.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.D - Metal:Oxygen = 1:2 and similar
  04.DL -With large (� medium-sized) cations; fluorite-type structures
 
04.DL.05 Cerianite-(Ce) (Ce,Th)O2 F m3m 4/m 3 2/m
 
04.DL.05 Zirkelite (Ca,Th,Ce)Zr(Ti,Nb)2O7 F m3m 4/m 3 2/m
 
04.DL.05 Thorianite ThO2 F m3m 4/m 3 2/m
 
04.DL.05 Uraninite UO2 F m3m 4/m 3 2/m
 

Other Cerianite-(Ce) Information

Help on References: References: NAME( AntBidBlaNic3) 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 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
13 - Uranium Minerals
14 - WWW-MINCRYST

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Cerianite-(Ce)

(Ce++++,Th)O2
Dana No: 04.04.12.01 Strunz No: 04.DL.05
Locality:

 

Notes:

 

 
   
 


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