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Calkinsite-(Ce) Mineral Data

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General Calkinsite-(Ce) Information

Help on Chemical  Formula: Chemical Formula: (Ce,La)2(CO3)3•4(H2O)
Help on Composition: Composition: Molecular Weight = 531.71 gm
   Lanthanum  13.06 %  La   15.32 % La2O3
   Cerium     39.53 %  Ce   46.30 % Ce2O3
   Hydrogen    1.52 %  H    13.55 % H2O
   Carbon      6.78 %  C    24.83 % CO2
   Oxygen     39.12 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ce1.5La0.5(CO3)3•4(H2O)
Help on Environment: Environment: Weathering product closely associated with burbankite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1953
Help on Locality: Locality: Vermiculite prospects at the head of Big Sandy Creek, Rocky Boy�s Indian Reservation, about 40 km east of Box Elder, Hill Co., Montana, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Frank Cathcart Calkins (1878-1974), geologist with the U.S. Geological Survey.
 

Calkinsite-(Ce) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7565:1:0.7067
Help on Cell Dimensions: Cell Dimensions: a = 9.57, b = 12.65, c = 8.94, Z = 4; V = 1,082.28 Den(Calc)= 3.26
Help on Crystal System: Crystal System: Orthorhombic - Disphenoidal H-M Symbol (2 2 2) Space Group: P 21221
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 6.54(1), 3.27(0.5), 4.78(0.4),
 

Physical Properties of Calkinsite-(Ce)

Help on Cleavage: Cleavage: {010} Perfect, {101} Distinct
Help on Color: Color: Light yellow.
Help on Density: Density: 3.27 - 3.29, Average = 3.28
Help on Hardness: Hardness: 2.5 - Finger Nail
 

Optical Properties of Calkinsite-(Ce)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.035 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.041 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1955,KPDmeas= 0.1943,KC= 0.1878
Ncalc = 1.61 - 1.62
Help on Optical Data: Optical Data: Biaxial (-), a=1.569, b=1.657, g=1.686, bire=0.1170, 2V(Calc)=56, 2V(Meas)=54.
 

Calculated Properties of Calkinsite-(Ce)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.03 gm/cc
note: Specific Gravity of Calkinsite-(Ce) =3.28 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0010530403
Boson Index = 0.9989469597
Help on Photoelectric: Photoelectric: PECalkinsite-(Ce) = 258.58 barns/electron
U=PECalkinsite-(Ce) x relectron= 783.20 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 51,800.09 (Gamma Ray American Petroleum Institute Units)
Concentration of Calkinsite-(Ce) per GRapi unit = 19.30 (PPM)

Calkinsite-(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) 587.19 ±146.80 grams of pure Calkinsite-(Ce) .

Estimated Radioactivity from Calkinsite-(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 / 8.35 cm 1,178,003 3.18E-05 51,800.09 17.03
100 gm / 3.88 cm 117,800 3.18E-06 5,180.01 1.70
10 gm / 1.80 cm 11,780 3.18E-07 518.00 0.17
1 gm / 8.35 mm 1,178 3.18E-08 51.80 0.02
0.1 gm / 3.88 mm 118 3.18E-09 5.18 0.00
0.01 gm / 1.80 mm 12 3.18E-10 0.52 0.00
0.001 gm / 0.84 mm 1 3.18E-11 0.05 0.00

Weight of pure Calkinsite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.28 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 ( 2.63 % Th) From Sum REE Elements (52.59 % REE)
 

Calkinsite-(Ce) Classification

Help on  Dana Class: Dana Class: 15.04.01.01 (15)Hydrated Carbonates
  (15.04)Dana Type
  (15.04.01)Dana Group
 
15.04.01.01 Calkinsite-(Ce) (Ce,La)2(CO3)3•4(H2O) P 21221 2 2 2
Help on  Strunz Class: Strunz Class: 05.CC.25 05 - CARBONATES (NITRATES)
  05.C - Carbonates without Additional Anions, with H2O
  05.CC -With rare-earth elements (REE)
 
05.CC.25 Calkinsite-(Ce) (Ce,La)2(CO3)3•4(H2O) P 21221 2 2 2
 
05.CC.25 Lanthanite-(Ce) (Ce,La)2(CO3)3•8(H2O) Pbnb 2/m 2/m 2/m
 
05.CC.25 Lanthanite-(La) (La,Ce)2(CO3)3•8(H2O) Pbnb 2/m 2/m 2/m
 
05.CC.25 Lanthanite-(Nd) (Nd,La)2(CO3)3•8(H2O) Pbnb 2/m 2/m 2/m
 

Other Calkinsite-(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 Calkinsite-(Ce) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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

Calkinsite-(Ce)

(Ce,La)2(CO3)3•4(H2O)
Dana No: 15.04.01.01 Strunz No: 05.CC.25
Locality:

 

Notes:

 

 
   
 


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