Carnotite Mineral Data + Say CARNOTITE


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General Carnotite Information

Help on Chemical  Formula: Chemical Formula: K2(UO2)2V2O8·3(H2O)
Help on Composition: Composition: Molecular Weight = 902.18 gm
   Potassium   8.67 %  K    10.44 % K2O
   Uranium    52.77 %  U    59.86 % UO2
   Vanadium   11.29 %  V    20.16 % V2O5
   Hydrogen    0.67 %  H     5.99 % H2O
   Oxygen     26.60 %  O
             ______        ______ 
             100.00 %       96.45 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K2(UO2)2(VO4)2·3(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1899
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the French chemist, M. A. Carnot (1839-1920).
 

Carnotite Image

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Carnotite

Comments: Bright yellow, fluorescent crystals of carnotite on sandstone.
Location: Anderson Mine, Yavapai County, USA. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Carnotite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.2449:1:0.8216
Help on Cell Dimensions: Cell Dimensions: a = 10.47, b = 8.41, c = 6.91, Z = 2; beta = 103.667° V = 591.22 Den(Calc)= 5.07
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 6.56(1), 3.12(0.7), 3.53(0.5),
Click Here for Large Carnotite Structure Window Crystal Structure:

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Appleman D E , Evans H T , American Mineralogist , 50 (1965) p.825-842, The crystal structures of synthetic anhydrous carnotite, K2(UO2)2V2O8, and, its cesium analogue, Cs2(UO2)2V2O8

 

Physical Properties of Carnotite

Help on Cleavage: Cleavage: [001] Perfect
Help on Color: Color: Yellow, Golden yellow, Greenish yellow.
Help on Density: Density: 3.7 - 4.7, Average = 4.2
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 2 - Gypsum
Help on Luminescence: Luminescence: None.
Help on Luster: Luster: Pearly
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: light yellow
 

Optical Properties of Carnotite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.288 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.067 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1805,KPDmeas= 0.2179,KC= 0.1692
Help on Optical Data: Optical Data: Biaxial (-), a=1.75-1.78, b=1.901-2.06, g=1.92-2.08, bire=0.1700-0.3000, 2V(Calc)=26-36, 2V(Meas)=43-60. Dispersion none.
Help on Pleochroism (x): Pleochroism (x): none.
Help on Pleochroism (y): Pleochroism (y): none.
Help on Pleochroism (z): Pleochroism (z): none.
 

Calculated Properties of Carnotite

Help on Electron Density: Electron Density:

relectron=4.43 gm/cc
note: rCarnotite =5.07 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00422
Boson Index = 0.99578
Help on Photoelectric: Photoelectric:

PECarnotite =1,373.99 barns/electron
U=PECarnotite x relectron=6,084.53 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 3,928,699.75 (Gamma Ray American Petroleum Institute Units)

Carnotite 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) 7.74 ± 1.94 grams of pure Carnotite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 774.22 ±193.55 grams of pure Carnotite .

Estimated Radioactivity from Carnotite - very 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 / 7.22 cm 94,456,845 2.55E-03 3,928,699.75 1,291.63
100 gm / 3.35 cm 9,445,685 2.55E-04 392,869.97 129.16
10 gm / 1.56 cm 944,568 2.55E-05 39,287.00 12.92
1 gm / 7.22 mm 94,457 2.55E-06 3,928.70 1.29
0.1 gm / 3.35 mm 9,446 2.55E-07 392.87 0.13
0.01 gm / 1.56 mm 945 2.55E-08 39.29 0.01
0.001 gm / 0.72 mm 94 2.55E-09 3.93 0.00

Weight of pure Carnotite in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.07 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
 

Carnotite Classification

Help on  Dana Class: Dana Class: 40.2a.28.1 (40)Hydrated Phosphates, etc
  (40.2a)where A++ (B++)2 (XO4) · x(H2O), containing (UO2)++
  (40.2a.28)Dana Group
 
40.2a.28.1 Carnotite K2(UO2)2V2O8·3(H2O) P 21/a 2/m
 
40.2a.28.2 Margaritasite (Cs,K,H3O)2(UO2)2V2O8·(H2O) P 21/a 2/m
Help on  Strunz Class: Strunz Class: VII/E.11-50 VII - Phosphates, Arsenates and Vanadates
  VII/E - Uranylphosphates and uranylvanadates with: [UO2]2+ - [PO4 | AsO4]3- and [UO2]2+ - [V2O8]6-, uranyl-groupvanadates with [UO2]2+ - [V2O8]6-
  VII/E.11 - Tyuyamunite series
 
VII/E.11-10 Vanuralite Al(UO2)2(VO4)2(OH)·11(H2O) A2/a 2/m
 
VII/E.11-20 Metavanuralite Al(UO2)2(VO4)2(OH)·8(H2O) P 1or P1 Tri
 
VII/E.11-30 Sengierite Cu2(UO2)2V2O8·6(H2O) P 21/a 2/m
 
VII/E.11-40 Strelkinite Na2(UO2)2V2O8·6(H2O) Pnmm,Pnm2 Ortho
 
VII/E.11-50 Carnotite K2(UO2)2V2O8·3(H2O) P 21/a 2/m
 
VII/E.11-60 Margaritasite (Cs,K,H3O)2(UO2)2V2O8·(H2O) P 21/a 2/m
 
VII/E.11-70 Vanuranylite? (H3O,Ba,Ca,K)1.6(UO2)2V2O8·4(H2O)(?) C 2/c ? 2/m
 
VII/E.11-80 Tyuyamunite Ca(UO2)2V2O8·5-8(H2O) Pnan 2/m 2/m 2/m
 
VII/E.11-90 Metatyuyamunite Ca(UO2)2V2O8·3(H2O) Pnam 2/m 2/m 2/m
 
VII/E.11-100 Francevillite (Ba,Pb)(UO2)2V2O8·5(H2O) Pcan 2/m 2/m 2/m
 
VII/E.11-110 Curienite Pb(UO2)2V2O8·5(H2O) Pcan 2/m 2/m 2/m
 

Other Carnotite Information

Help on References: References: NAME( Duda&Rejl90) 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 Carnotite :
1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Applied Mineralogy 4 -Athena 5 - Crocoite.com Mineral Locations 6 - EUROmin Project 7 -Google Images 8 -Google Scholar 9 -Handbook of Mineralogy (UofA) 10 -MinDAT 11 -MinMax(Deutsch) 12 -MinMax(English) 13 -Mineralienatlas (Deutsch) 14 -QUT Mineral Atlas 15 - Uranium Minerals 16 - WWW-MINCRYST 17 -École des Mines de Paris

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Print or Cut-and-Paste your Carnotite Specimen Label here :

Carnotite

K2(UO2)2V2O8·3(H2O)
Dana No: 40.2a.28.1 Strunz No: VII/E.11-50
Locality:

 

Notes:

 

 
   
 
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