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Lanthanite-(Ce) Mineral Data

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General Lanthanite-(Ce) Information

Help on Chemical  Formula: Chemical Formula: (Ce,La)2(CO3)3•8(H2O)
Help on Composition: Composition: Molecular Weight = 603.78 gm
   Lanthanum  11.50 %  La   13.49 % La2O3
   Cerium     34.81 %  Ce   40.77 % Ce2O3
   Hydrogen    2.67 %  H    23.87 % H2O
   Carbon      5.97 %  C    21.87 % CO2
   Oxygen     45.05 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ce1.5La0.5(CO3)3•8(H2O)
Help on Environment: Environment: Rare secondary mineral typically formed by alteration or weathering from earlier rare-earth-element-bearing minerals.
Help on IMA Status: IMA Status: Approved IMA 1985
Help on Locality: Locality: Britannia mine, Snowdon, Caernarvonshire (Gwynedd), Wales. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its relationship to lanthanite-(La) and the cerium content.
Help on Name Pronunciation: Name Pronunciation: Lanthanite-(Ce) + Pronunciation Say LANTHANITE-(CE)
Help on Synonym: Synonym: ICSD 100027
  PDF 38-377
 

Lanthanite-(Ce) Image

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  Lanthanite-(Ce)

Comments: Brownish, square crystals of lanthanite-(Ce) ?.
Location: Curitiba, Parana, Brazil. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Lanthanite-(Ce) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5598:1:0.5292
Help on Cell Dimensions: Cell Dimensions: a = 9.482, b = 16.938, c = 8.965, Z = 4; V = 1,439.83 Den(Calc)= 2.79
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pbnb
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 8.47(1), 3.255(0.73), 4.746(0.65),
 

Physical Properties of Lanthanite-(Ce)

Help on Cleavage: Cleavage: {010} Good
Help on Color: Color: Colorless.
Help on Density: Density: 2.76
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Lanthanite-(Ce)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.021 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.01 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2081,KPDmeas= 0.2104,KC= 0.206
Ncalc = 1.57
Help on Optical Data: Optical Data: Biaxial (-), a=1.532, b=1.594, g=1.616, bire=0.0840, 2V(Calc)=58, 2V(Meas)=60. Dispersion r < v weak.
 

Calculated Properties of Lanthanite-(Ce)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.64 gm/cc
note: Specific Gravity of Lanthanite-(Ce) =2.79 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0009802402
Boson Index = 0.9990197598
Help on Photoelectric: Photoelectric: PELanthanite-(Ce) = 222.40 barns/electron
U=PELanthanite-(Ce) x relectron= 586.82 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 46,718.71 (Gamma Ray American Petroleum Institute Units)
Concentration of Lanthanite-(Ce) per GRapi unit = 21.40 (PPM)

Lanthanite-(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) 651.06 ±162.76 grams of pure Lanthanite-(Ce) .

Estimated Radioactivity from Lanthanite-(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 / 8.81 cm 1,037,407 2.80E-05 46,718.71 15.36
100 gm / 4.09 cm 103,741 2.80E-06 4,671.87 1.54
10 gm / 1.90 cm 10,374 2.80E-07 467.19 0.15
1 gm / 8.81 mm 1,037 2.80E-08 46.72 0.02
0.1 gm / 4.09 mm 104 2.80E-09 4.67 0.00
0.01 gm / 1.90 mm 10 2.80E-10 0.47 0.00
0.001 gm / 0.88 mm 1 2.80E-11 0.05 0.00

Weight of pure Lanthanite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.79 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 ( 2.32 % Th) From Sum REE Elements (46.31 % REE)
 

Lanthanite-(Ce) Classification

Help on  Dana Class: Dana Class: 15.04.02.03 (15)Hydrated Carbonates
  (15.04)Dana Type
  (15.04.02)Lanthanite Series
 
15.04.02.01 Lanthanite-(La) (La,Ce)2(CO3)3•8(H2O) Pbnb 2/m 2/m 2/m
 
15.04.02.02 Lanthanite-(Nd) (Nd,La)2(CO3)3•8(H2O) Pbnb 2/m 2/m 2/m
 
15.04.02.03 Lanthanite-(Ce) (Ce,La)2(CO3)3•8(H2O) Pbnb 2/m 2/m 2/m
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 Lanthanite-(Ce) Information

Help on References: References: NAME( AntBidBlaNic5) 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 Lanthanite-(Ce) :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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

Lanthanite-(Ce)

(Ce,La)2(CO3)3•8(H2O)
Dana No: 15.04.02.03 Strunz No: 05.CC.25
Locality:

 

Notes:

 

 
   
 


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