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Rhabdophane-(La) Mineral Data

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General Rhabdophane-(La) Information

Help on Chemical  Formula: Chemical Formula: (La,Ce)PO4•(H2O)
Help on Composition: Composition: Molecular Weight = 252.19 gm
   Lanthanum   41.31 %  La   48.45 % La2O3
   Cerium      13.89 %  Ce   16.27 % Ce2O3
   Phosphorus  12.28 %  P    28.14 % P2O5
   Hydrogen     0.80 %  H     7.14 % H2O
   Oxygen      31.72 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: La0.75Ce0.25(PO4)•(H2O)
Help on IMA Status: IMA Status: Approved IMA 1959
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named to distinguish the La rich form of rhabdophane-Ce.
Help on Name Pronunciation: Name Pronunciation: Rhabdophane-(La) + Pronunciation Say RHABDOPHANE-(LA)
 

Rhabdophane-(La) Image

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  Rhabdophane-(La)

Comments: Analcime crystal covered with rhabdophane-(La) crystals with black aegirine.
Location: Demix Quarry, Mont St Hilaire, Quebec, Canada. Scale: Crystal Size to 2cm.
© Adam Larson

Rhabdophane-(La) Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.91547
Help on Cell Dimensions: Cell Dimensions: a = 6.98, c = 6.39, Z = 3; V = 269.61 Den(Calc)= 4.66
Help on Crystal System: Crystal System: Hexagonal - Trapezohedral H-M Symbol (6 2 2) Space Group: P 6222
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.02(1), 2.83(0.8), 4.4(0.8),
 

Physical Properties of Rhabdophane-(La)

Help on Cleavage: Cleavage: None
Help on Color: Color: Brown, Pink.
Help on Density: Density: 3.94
Help on Diaphaneity: Diaphaneity: Translucent
Help on Hardness: Hardness: 3-4 - Calcite-Fluorite
Help on Luster: Luster: Greasy (Oily)
Help on Streak: Streak: white
 

Optical Properties of Rhabdophane-(La)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.008 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.148 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1456,KPDmeas= 0.1722,KC= 0.1709
Ncalc = 1.67 - 1.8
Help on Optical Data: Optical Data: Uniaxial (+), w=1.654, e=1.703, bire=0.0490.
 

Calculated Properties of Rhabdophane-(La)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.57 gm/cc
note: Specific Gravity of Rhabdophane-(La) =3.94 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.000525238
Boson Index = 0.999474762
Help on Photoelectric: Photoelectric: PERhabdophane-(La) = 267.44 barns/electron
U=PERhabdophane-(La) x relectron= 954.71 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 53,346.69 (Gamma Ray American Petroleum Institute Units)
Concentration of Rhabdophane-(La) per GRapi unit = 18.75 (PPM)

Rhabdophane-(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) 570.17 ±142.54 grams of pure Rhabdophane-(La) .

Estimated Radioactivity from Rhabdophane-(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 / 7.86 cm 1,236,449 3.34E-05 53,346.69 17.54
100 gm / 3.65 cm 123,645 3.34E-06 5,334.67 1.75
10 gm / 1.69 cm 12,364 3.34E-07 533.47 0.18
1 gm / 7.86 mm 1,236 3.34E-08 53.35 0.02
0.1 gm / 3.65 mm 124 3.34E-09 5.33 0.00
0.01 gm / 1.69 mm 12 3.34E-10 0.53 0.00
0.001 gm / 0.79 mm 1 3.34E-11 0.05 0.00

Weight of pure Rhabdophane-(La) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.94 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 ( 2.76 % Th) From Sum REE Elements (55.20 % REE)
 

Rhabdophane-(La) Classification

Help on  Dana Class: Dana Class: 40.04.07.02 (40)Hydrated Phosphates, etc
  (40.04)where A+++ XO4 � x(H2O)
  (40.04.07)Rhabdophane Group
 
40.04.07.01 Rhabdophane-(Ce) (Ce,La)PO4•(H2O) P 6222 6 2 2
 
40.04.07.02 Rhabdophane-(La) (La,Ce)PO4•(H2O) P 6222 6 2 2
 
40.04.07.03 Rhabdophane-(Nd) (Nd,Ce,La)PO4•(H2O) P 6222 6 2 2
 
40.04.07.04 Grayite (Th,Pb,Ca)PO4•(H2O) P 6222 6 2 2
 
40.04.07.05 Brockite (Ca,Th,Ce)(PO4)•(H2O) P 6222 6 2 2
 
40.04.07.06 Tristramite (Ca,U,Fe)(PO4,SO4)•2(H2O) P 6222 6 2 2
Help on  Strunz Class: Strunz Class: 08.CJ.45 08 - PHOSPHATES, ARSENATES, VANADATES
  08.C - Phosphates without Additional Anions, with H2O
  08.CJ -With only large cations
 
08.CJ.45 Brockite (Ca,Th,Ce)(PO4)•(H2O) P 6222 6 2 2
 
08.CJ.45 Grayite (Th,Pb,Ca)PO4•(H2O) P 6222 6 2 2
 
08.CJ.45 Rhabdophane-(Ce) (Ce,La)PO4•(H2O) P 6222 6 2 2
 
08.CJ.45 Rhabdophane-(La) (La,Ce)PO4•(H2O) P 6222 6 2 2
 
08.CJ.45 Rhabdophane-(Nd) (Nd,Ce,La)PO4•(H2O) P 6222 6 2 2
 
08.CJ.45 Tristramite (Ca,U,Fe)(PO4,SO4)•2(H2O) P 6222 6 2 2
 

Other Rhabdophane-(La) 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 Rhabdophane-(La) :
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 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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

Rhabdophane-(La)

(La,Ce)PO4•(H2O)
Dana No: 40.04.07.02 Strunz No: 08.CJ.45
Locality:

 

Notes:

 

 
   
 


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