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Cebaite-(Ce) Mineral Data

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General Cebaite-(Ce) Information

Help on Chemical  Formula: Chemical Formula: Ba3Ce2(CO3)5F2
Help on Composition: Composition: Molecular Weight = 1,030.25 gm
   Barium    39.99 %  Ba   44.65 % BaO
   Cerium    27.20 %  Ce   31.86 % Ce2O3
   Carbon     5.83 %  C    21.36 % CO2
   Oxygen    23.29 %  O
   Fluorine   3.69 %  F     3.69 % F
               -   %   F    -1.55 % -O=F2    
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ba3Ce2(CO3)5F2
Help on Environment: Environment: Fe-Nb rare-earth deposit.
Help on IMA Status: IMA Status: Approved IMA 1973
Help on Locality: Locality: East mine, Bayan Obo, Inner Mongolia, China. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the composition.
Help on Synonym: Synonym: ICSD 81121
  PDF 43-691
 

Cebaite-(Ce) Image

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  Cebaite-(Ce)

Comments: Gemmy yellow to orange-yellow massive cebaite-(Ce); some cleavage evident, associated with green aegirine.
Location: Baiyun-Obo mine, Inner Mongolia, China. Scale: See Image.
© Rruff Database

Cebaite-(Ce) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =4.2555:1:2.6295
Help on Cell Dimensions: Cell Dimensions: a = 21.4256, b = 5.0348, c = 13.2395, Z = 4; beta = 91.613° V = 1,427.63 Den(Calc)= 4.79
Help on Crystal System: Crystal System: Monoclinic Space Group: C 2/m or C 2
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.25(1), 1.99(0.9), 3.98(0.8),
 

Physical Properties of Cebaite-(Ce)

Help on Cleavage: Cleavage: {301} Indistinct
Help on Color: Color: Gray white, Orange.
Help on Density: Density: 4.81
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Hardness: Hardness: 4.5-5 - Near Apatite
Help on Luster: Luster: Vitreous - Waxy
Help on Streak: Streak: gray white
 

Optical Properties of Cebaite-(Ce)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.038 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.034 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1447,KPDmeas= 0.1441,KC= 0.1498
Ncalc = 1.72
Help on Optical Data: Optical Data: Biaxial (-), a=1.598-1.604, b=1.735, g=1.74-1.748, bire=0.1420-0.1440, 2V(Calc)=20-32, 2V(Meas)=5.
 

Calculated Properties of Cebaite-(Ce)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.20 gm/cc
note: Specific Gravity of Cebaite-(Ce) =4.79 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.07
Boson Index = 0.93
Help on Photoelectric: Photoelectric: PECebaite-(Ce) = 325.88 barns/electron
U=PECebaite-(Ce) x relectron=1,369.67 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 25,457.94 (Gamma Ray American Petroleum Institute Units)
Concentration of Cebaite-(Ce) per GRapi unit = 39.28 (PPM)

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

Estimated Radioactivity from Cebaite-(Ce) - weak
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 / 7.36 cm 609,282 1.65E-05 25,457.94 8.37
100 gm / 3.42 cm 60,928 1.65E-06 2,545.79 0.84
10 gm / 1.59 cm 6,093 1.65E-07 254.58 0.08
1 gm / 7.36 mm 609 1.65E-08 25.46 0.01
0.1 gm / 3.42 mm 61 1.65E-09 2.55 0.00
0.01 gm / 1.59 mm 6 1.65E-10 0.25 0.00
0.001 gm / 0.74 mm 1 1.65E-11 0.03 0.00

Weight of pure Cebaite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.79 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 ( 1.36 % Th) From Sum REE Elements (27.20 % REE)
 

Cebaite-(Ce) Classification

Help on  Dana Class: Dana Class: 16a.01.09.01 (16a)Carbonates - Hydroxyl or Halogen
  (16a.01)in the Bastnasite/Shynchysite/Parasite Groups
  (16a.01.09)Dana Group
 
16a.01.09.01 Cebaite-(Ce) Ba3Ce2(CO3)5F2 C 2/m or C 2 Mono
 
16a.01.09.02 Cebaite-(Nd)! Ba3(Nd,Ce)2(CO3)5F2 Unk Mono
Help on  Strunz Class: Strunz Class: 05.BD.15 05 - CARBONATES (NITRATES)
  05.B - Carbonates with additional anions, without H2O
  05.BD -With rare-earth elements (REE)
 
05.BD.15 Cebaite-(Nd)! Ba3(Nd,Ce)2(CO3)5F2 Unk Mono
 
05.BD.15 Cebaite-(Ce) Ba3Ce2(CO3)5F2 C 2/m or C 2 Mono
 

Other Cebaite-(Ce) Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Cebaite-(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 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Print or Cut-and-Paste your Cebaite-(Ce) Specimen Label here :

Cebaite-(Ce)

Ba3Ce2(CO3)5F2
Dana No: 16a.01.09.01 Strunz No: 05.BD.15
Locality:

 

Notes:

 

 
   
 


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