Mineralogy Database

Urancalcarite Mineral Data

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General Urancalcarite Information

Help on Chemical  Formula: Chemical Formula: Ca(UO2)3(CO3)(OH)6•3(H2O)
Help on Composition: Composition: Molecular Weight = 1,066.26 gm
   Calcium    3.76 %  Ca    5.26 % CaO
   Uranium   66.97 %  U    75.97 % UO2
   Hydrogen   1.13 %  H    10.14 % H2O
   Carbon     1.13 %  C     4.13 % CO2
   Oxygen    27.01 %  O
            ______        ______ 
            100.00 %       95.50 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca(UO2)3(CO3)(OH)6•3(H2O)
Help on Environment: Environment: Found on uraninite.
Help on IMA Status: IMA Status: Approved IMA 1983
Help on Locality: Locality: Shinkolbwe, Shaba, Zaire. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the composition.
Help on Name Pronunciation: Name Pronunciation: Urancalcarite + Pronunciation Say URANCALCARITE
 

Urancalcarite Image

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  Urancalcarite

Comments: Bright yellow earthy spots composed of micro acicular urancalcarite crystals associated with rusty browm huemulite.
Location: Huemul mine, Malargue, Mendoza, Argentina. Scale: Picture size 1.5 cm.
© Tom Loomis / Dakota Matrix

Urancalcarite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9589:1:0.4334
Help on Cell Dimensions: Cell Dimensions: a = 15.42, b = 16.08, c = 6.97, Z = 4; V = 1,728.24 Den(Calc)= 4.10
Help on Crystal System: Crystal System: Orthorhombic Space Group: Pbnm,Pbn21
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 8.06(1), 4.02(0.8), 3.488(0.7),
 

Physical Properties of Urancalcarite

Help on Cleavage: Cleavage: None
Help on Color: Color: Bright yellow.
Help on Density: Density: 4.03
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Streak: Streak: light yellow
 

Optical Properties of Urancalcarite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.339 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.316 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1714,KPDmeas= 0.1744,KC= 0.1302
Ncalc = 1.52 - 1.53
Help on Optical Data: Optical Data: Biaxial (-), a=1.66, b=1.712, g=1.736, bire=0.0760, 2V(Calc)=66, 2V(Meas)=67.
 

Calculated Properties of Urancalcarite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.52 gm/cc
note: Specific Gravity of Urancalcarite =4.10 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0051279226
Boson Index = 0.9948720774
Help on Photoelectric: Photoelectric: PEUrancalcarite =1,769.23 barns/electron
U=PEUrancalcarite x relectron=6,231.61 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 4,904,037.40 (Gamma Ray American Petroleum Institute Units)
Concentration of Urancalcarite per GRapi unit = 203.91 (PPB)

Urancalcarite 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) 6.20 ± 1.55 grams of pure Urancalcarite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 620.24 ±155.06 grams of pure Urancalcarite .

Estimated Radioactivity from Urancalcarite - 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 / 7.75 cm 119,878,358 3.24E-03 4,904,037.40 1,612.29
100 gm / 3.60 cm 11,987,836 3.24E-04 490,403.74 161.23
10 gm / 1.67 cm 1,198,784 3.24E-05 49,040.37 16.12
1 gm / 7.75 mm 119,878 3.24E-06 4,904.04 1.61
0.1 gm / 3.60 mm 11,988 3.24E-07 490.40 0.16
0.01 gm / 1.67 mm 1,199 3.24E-08 49.04 0.02
0.001 gm / 0.78 mm 120 3.24E-09 4.90 0.00

Weight of pure Urancalcarite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.10 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
 

Urancalcarite Classification

Help on  Dana Class: Dana Class: 16b.05.02.01 (16b)Carbonates - Hydroxyl or Halogen
  (16b.05)with miscellaneous formulae
  (16b.05.02)Dana Group
 
16b.05.02.01 Urancalcarite Ca(UO2)3(CO3)(OH)6•3(H2O) Pbnm,Pbn21 Ortho
Help on  Strunz Class: Strunz Class: 05.EA.10 05 - CARBONATES (NITRATES)
  05.E - Uranyl Carbonates
  05.EA -UO2:CO3 > 1:1
 
05.EA.10 Urancalcarite Ca(UO2)3(CO3)(OH)6•3(H2O) Pbnm,Pbn21 Ortho
 

Other Urancalcarite Information

Help on References: References: NAME( Dana8) 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 Urancalcarite :
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 (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - Uranium Minerals

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

Urancalcarite

Ca(UO2)3(CO3)(OH)6•3(H2O)
Dana No: 16b.05.02.01 Strunz No: 05.EA.10
Locality:

 

Notes:

 

 
   
 


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