Chernovite-(Ce) Mineral Data

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General Chernovite-(Ce) Information

Help on Chemical  Formula: Chemical Formula: (Ce,Y)(AsO4)
Help on Composition: Composition: Molecular Weight = 266.23 gm
   Cerium   39.47 %  Ce   46.23 % Ce2O3
   Yttrium   8.35 %  Y    10.60 % Y2O3
   Arsenic  28.14 %  As   43.17 % As2O5
   Oxygen   24.04 %  O
           ______        ______ 
           100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ce0.75Y0.25(AsO4)
Help on IMA Status: IMA Status: Not Approved IMA
Help on Locality: Locality: Link to MinDat.org Location Data.
 

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Chernovite-(Ce) Crystallography

Help on Crystal System: Crystal System: Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: I 41/amd
 

Physical Properties of Chernovite-(Ce)

Help on Cleavage: Cleavage: [???] Perfect
Help on Color: Color: Colorless, Pale yellow.
Help on Density: Density: 4.5
Help on Diaphaniety: Diaphaniety: Transparent
Help on Hardness: Hardness: 4-4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Chernovite-(Ce)

Help on Optical Data: Optical Data: NCalc= 1.7 - from Gladstone-Dale relationship (KC = 0.1545) where Ncalc=Dmeas*KC+1
 

Calculated Properties of Chernovite-(Ce)

Help on Electron Density: Electron Density:

relectron=4.00 gm/cc
note: rChernovite-(Ce) =4.50 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00011
Boson Index = 0.99989
Help on Photoelectric: Photoelectric:

PEChernovite-(Ce) = 236.67 barns/electron
U=PEChernovite-(Ce) x relectron= 946.07 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 37,401.19 (Gamma Ray American Petroleum Institute Units)

Chernovite-(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) 813.25 ±203.31 grams of pure Chernovite-(Ce) .

Estimated Radioactivity from Chernovite-(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 / 7.52 cm 884,166 2.39E-05 37,401.19 12.30
100 gm / 3.49 cm 88,417 2.39E-06 3,740.12 1.23
10 gm / 1.62 cm 8,842 2.39E-07 374.01 0.12
1 gm / 7.52 mm 884 2.39E-08 37.40 0.01
0.1 gm / 3.49 mm 88 2.39E-09 3.74 0.00
0.01 gm / 1.62 mm 9 2.39E-10 0.37 0.00
0.001 gm / 0.75 mm 1 2.39E-11 0.04 0.00

Weight of pure Chernovite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.50 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 ( 1.97 % Th) From Sum REE Elements (39.47 % REE)
 

Chernovite-(Ce) Classification

Help on  Dana Class: Dana Class: 37.0.0.0 (37)Phosphate Minerals
  (37.0)Without Dana Classification Numbers
  (Arsenate, Anhydrous)
Help on  Strunz Class: Strunz Class: VII/A.14-25 VII - Phosphates, Arsenates and Vanadates
  VII/A - Waterfree phosphates [PO4]3- without unfamiliar anions, cations of very big size: Ca, Na and andre
  VII/A.14 - Xenotime-(Y) - Wakefieldite-(Ce) series
 
VII/A.14-05 Pretulite! ScPO4 I 41/amd 4/m 2/m 2/m
 
VII/A.14-08 Xenotime-(Yb)! YbPO4 I 41/amd 4/m 2/m 2/m
 
VII/A.14-10 Xenotime-(Y) YPO4 I 41/amd 4/m 2/m 2/m
 
VII/A.14-20 Chernovite-(Y) YAsO4 I 41/amd 4/m 2/m 2/m
 
VII/A.14-25 Chernovite-(Ce) (Ce,Y)(AsO4) I 41/amd 4/m 2/m 2/m
 
VII/A.14-30 Wakefieldite-(Y) YVO4 I 41/amd 4/m 2/m 2/m
 
VII/A.14-40 Wakefieldite-(Ce) (Ce,Pb,Pb)VO4 I 41/amd 4/m 2/m 2/m
 

Other Chernovite-(Ce) Information

Help on See Also: See Also: Links to other databases for Chernovite-(Ce) :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 -École des Mines de Paris

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Chernovite-(Ce)

(Ce,Y)(AsO4)
Dana No: Unknown Strunz No: VII/A.14-25
Locality:

 

Notes:

 

 
   
 
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