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Lanthanite-(La) Mineral Data

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General Lanthanite-(La) Information

Help on Chemical  Formula: Chemical Formula: (La,Ce)2(CO3)3•8(H2O)
Help on Composition: Composition: Molecular Weight = 602.57 gm
   Lanthanum  34.58 %  La   40.55 % La2O3
   Cerium     11.63 %  Ce   13.62 % Ce2O3
   Hydrogen    2.68 %  H    23.92 % H2O
   Carbon      5.98 %  C    21.91 % CO2
   Oxygen     45.14 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: La1.5Ce0.5(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: Valid Species (Pre-IMA) 1845
Help on Locality: Locality: Bastn�s, Riddarhyttan, V�stmanland, Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the dominant lanthanum in the composition. From the Greek, lanthanein = "to lie hidden."
Help on Name Pronunciation: Name Pronunciation: Lanthanite-(La) + Pronunciation Say LANTHANITE-(LA)
Help on Synonym: Synonym: Coutinhite
  Coutinite
  Neodymite
 

Lanthanite-(La) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5609:1:0.5274
Help on Cell Dimensions: Cell Dimensions: a = 9.504, b = 16.943, c = 8.937, Z = 4; V = 1,439.09 Den(Calc)= 2.78
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): 3.12(1), 9.1(0.9), 4.6(0.7),
Help on Forms: Forms:

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Help on Above

Forms: ( 0 1 0) ( 1 2 1) ( 1 2 0) ( 1 0 0) ( 0 0 1)

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Physical Properties of Lanthanite-(La)

Help on Cleavage: Cleavage: {???} Perfect
Help on Color: Color: Colorless, Yellowish, Yellowish white, White, Pink.
Help on Density: Density: 2.61
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Micaceous - Fracture of flexable micaceous cleavage fragments.
Help on Habit: Habit: Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Hardness: Hardness: 3 - Calcite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Pearly
Help on Streak: Streak: white
 

Optical Properties of Lanthanite-(La)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.06 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.005 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2062,KPDmeas= 0.2197,KC= 0.2072
Ncalc = 1.54 - 1.58
Help on Optical Data: Optical Data: Biaxial (-), a=1.52, b=1.587, g=1.613, bire=0.0930, 2V(Calc)=60, 2V(Meas)=63. Dispersion relatively weak.
 

Calculated Properties of Lanthanite-(La)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.63 gm/cc
note: Specific Gravity of Lanthanite-(La) =2.78 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0011896789
Boson Index = 0.9988103211
Help on Photoelectric: Photoelectric: PELanthanite-(La) = 214.44 barns/electron
U=PELanthanite-(La) x relectron= 562.95 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 46,539.97 (Gamma Ray American Petroleum Institute Units)
Concentration of Lanthanite-(La) per GRapi unit = 21.49 (PPM)

Lanthanite-(La) 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) 653.56 ±163.39 grams of pure Lanthanite-(La) .

Estimated Radioactivity from Lanthanite-(La) - 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 / 8.82 cm 1,034,993 2.80E-05 46,539.97 15.30
100 gm / 4.10 cm 103,499 2.80E-06 4,654.00 1.53
10 gm / 1.90 cm 10,350 2.80E-07 465.40 0.15
1 gm / 8.82 mm 1,035 2.80E-08 46.54 0.02
0.1 gm / 4.10 mm 103 2.80E-09 4.65 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-(La) in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.78 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 ( 2.31 % Th) From Sum REE Elements (46.21 % REE)
 

Lanthanite-(La) Classification

Help on  Dana Class: Dana Class: 15.04.02.01 (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-(La) 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-(La) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info
12 - WWW-MINCRYST

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

Lanthanite-(La)

(La,Ce)2(CO3)3•8(H2O)
Dana No: 15.04.02.01 Strunz No: 05.CC.25
Locality:

 

Notes:

 

 
   
 


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