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Chukhrovite-(Ce) Mineral Data

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General Chukhrovite-(Ce) Information

Help on Chemical  Formula: Chemical Formula: Ca3(Ce,Y)Al2(SO4)F13•10(H2O)
Help on Composition: Composition: Molecular Weight = 824.71 gm
   Calcium   14.58 %  Ca   20.40 % CaO
   Cerium    12.74 %  Ce   14.92 % Ce2O3
   Yttrium    2.70 %  Y     3.42 % Y2O3
   Aluminum   6.54 %  Al   12.36 % Al2O3
   Hydrogen   2.44 %  H    21.84 % H2O
   Sulfur     3.89 %  S     9.71 % SO3
   Oxygen    27.16 %  O
   Fluorine  29.95 %  F    29.95 % F
               -   %   F   -12.61 % -O=F2    
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca3Ce0.75Y0.25Al2(SO4)F13•10(H2O)
Help on Environment: Environment: Hydrothermal barite-fluorite vein deposit.
Help on IMA Status: IMA Status: Approved IMA 1960
Help on Locality: Locality: Clara mine, near Oberwolfach, Black Forest, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its relation to chukhrovite-(Y) and content of cerium as the dominant rare-earth element.
Help on Synonym: Synonym: ICSD 61184
  PDF 43-667
 

Chukhrovite-(Ce) Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 16.8, Z = 8; V = 4,741.63 Den(Calc)= 2.31
Help on Crystal System: Crystal System: Isometric - Diploidal H-M Symbol (2/m 3) Space Group: F d3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.75(1), 5.93(0.8), 3.22(0.7),
 

Physical Properties of Chukhrovite-(Ce)

Help on Cleavage: Cleavage: {???} Indistinct
Help on Color: Color: White.
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white
 

Optical Properties of Chukhrovite-(Ce)

Help on Optical Data: Optical Data: Isotropic, n=1.443.
 

Calculated Properties of Chukhrovite-(Ce)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.26 gm/cc
note: Specific Gravity of Chukhrovite-(Ce) =2.31 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0006224655
Boson Index = 0.9993775345
Help on Photoelectric: Photoelectric: PEChukhrovite-(Ce) = 65.71 barns/electron
U=PEChukhrovite-(Ce) x relectron= 148.80 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 13,324.68 (Gamma Ray American Petroleum Institute Units)
Concentration of Chukhrovite-(Ce) per GRapi unit = 75.05 (PPM)

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

Estimated Radioactivity from Chukhrovite-(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 / 9.39 cm 285,427 7.71E-06 13,324.68 4.38
100 gm / 4.36 cm 28,543 7.71E-07 1,332.47 0.44
10 gm / 2.02 cm 2,854 7.71E-08 133.25 0.04
1 gm / 9.39 mm 285 7.71E-09 13.32 0.00
0.1 gm / 4.36 mm 29 7.71E-10 1.33 0.00
0.01 gm / 2.02 mm 3 7.71E-11 0.13 0.00
0.001 gm / 0.94 mm 0 7.71E-12 0.01 0.00

Weight of pure Chukhrovite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.31 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 ( 0.64 % Th) From Sum REE Elements (12.74 % REE)
 

Chukhrovite-(Ce) Classification

Help on  Dana Class: Dana Class: 12.01.05.02 (12)Compound Halides
  (12.01)with miscellaneous anions
  (12.01.05)Chukhrovite Group
 
12.01.05.01 Chukhrovite-(Y) Ca3(Y,Ce)Al2(SO4)F13•10(H2O) F d3 2/m 3
 
12.01.05.02 Chukhrovite-(Ce) Ca3(Ce,Y)Al2(SO4)F13•10(H2O) F d3 2/m 3
 
12.01.05.03 Meniaylovite! Ca4AlSi(SO4)F13•12(H2O) F d3 2/m 3
 
12.01.05.04 Chukhrovite-(Nd)! Ca3(Nd,Y)Al2(SO4)F13•12(H2O) F d3 2/m 3
Help on  Strunz Class: Strunz Class: 03.CG.10 03 - HALIDES
  03.C - Complex Halides
  03.CG -Aluminofluorides with CO3, SO4, PO4
 
03.CG.10 Chukhrovite-(Ce) Ca3(Ce,Y)Al2(SO4)F13•10(H2O) F d3 2/m 3
 
03.CG.10 Chukhrovite-(Y) Ca3(Y,Ce)Al2(SO4)F13•10(H2O) F d3 2/m 3
 
03.CG.10 Meniaylovite! Ca4AlSi(SO4)F13•12(H2O) F d3 2/m 3
 
03.CG.10 Chukhrovite-(Nd)! Ca3(Nd,Y)Al2(SO4)F13•12(H2O) F d3 2/m 3
 

Other Chukhrovite-(Ce) Information

Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Chukhrovite-(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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Chukhrovite-(Ce)

Ca3(Ce,Y)Al2(SO4)F13•10(H2O)
Dana No: 12.01.05.02 Strunz No: 03.CG.10
Locality:

 

Notes:

 

 
   
 


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