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Rhabdophane-(Ce) Mineral Data

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General Rhabdophane-(Ce) Information

Help on Chemical  Formula: Chemical Formula: (Ce,La)PO4•(H2O)
Help on Composition: Composition: Molecular Weight = 252.80 gm
   Lanthanum   13.74 %  La   16.11 % La2O3
   Cerium      41.57 %  Ce   48.69 % Ce2O3
   Phosphorus  12.25 %  P    28.07 % P2O5
   Hydrogen     0.80 %  H     7.13 % H2O
   Oxygen      31.64 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ce0.75La0.25(PO4)•(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1878
Help on Locality: Locality: Mine dumps of Fowey Consuls, Cornwall, England, UK. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from the Greek, "rod" and "to appear", in allusion to the characteristic bands shown in its spectrum.
Help on Name Pronunciation: Name Pronunciation: Rhabdophane-(Ce) + Pronunciation Say RHABDOPHANE-(CE)
Help on Synonym: Synonym: ICSD 31563
  PDF 46-1303
 

Rhabdophane-(Ce) Image

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  Rhabdophane-(Ce)

Comments: White acicular crystals rhabdophane-(Ce) on matrix.
Location: Reinersreuth Quarry (Köhlerloch), Großer Waldstein, Weißenstadt, Fichtelgebirge, Bavaria, Germany. Scale: Picture size 1.3 mm.
© Thomas Witzke / Abraxas-Verlag

Rhabdophane-(Ce) Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.91551
Help on Cell Dimensions: Cell Dimensions: a = 6.96, c = 6.372, Z = 3; V = 267.32 Den(Calc)= 4.71
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): 2.82(1), 3.01(0.9), 6.03(0.55),
 

Physical Properties of Rhabdophane-(Ce)

Help on Cleavage: Cleavage: None
Help on Color: Color: White, Brownish white, Yellowish white, Pinkish white.
Help on Density: Density: 4
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Mammillary - Larger "breast-like" rounded forms resembling botryoidal (e.g. malachite).
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Greasy (Oily)
Help on Streak: Streak: white
 

Optical Properties of Rhabdophane-(Ce)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.056 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.103 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.152,KPDmeas= 0.179,KC= 0.1696
Ncalc = 1.68 - 1.8
Help on Optical Data: Optical Data: Uniaxial (+), w=1.688, e=1.744, bire=0.0560.
 

Calculated Properties of Rhabdophane-(Ce)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.63 gm/cc
note: Specific Gravity of Rhabdophane-(Ce) =4.00 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0002767203
Boson Index = 0.9997232797
Help on Photoelectric: Photoelectric: PERhabdophane-(Ce) = 277.11 barns/electron
U=PERhabdophane-(Ce) x relectron=1,006.27 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 53,555.78 (Gamma Ray American Petroleum Institute Units)
Concentration of Rhabdophane-(Ce) per GRapi unit = 18.67 (PPM)

Rhabdophane-(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) 567.94 ±141.99 grams of pure Rhabdophane-(Ce) .

Estimated Radioactivity from Rhabdophane-(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 / 7.82 cm 1,238,850 3.35E-05 53,555.78 17.61
100 gm / 3.63 cm 123,885 3.35E-06 5,355.58 1.76
10 gm / 1.68 cm 12,389 3.35E-07 535.56 0.18
1 gm / 7.82 mm 1,239 3.35E-08 53.56 0.02
0.1 gm / 3.63 mm 124 3.35E-09 5.36 0.00
0.01 gm / 1.68 mm 12 3.35E-10 0.54 0.00
0.001 gm / 0.78 mm 1 3.35E-11 0.05 0.00

Weight of pure Rhabdophane-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.00 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 ( 2.77 % Th) From Sum REE Elements (55.31 % REE)
 

Rhabdophane-(Ce) Classification

Help on  Dana Class: Dana Class: 40.04.07.01 (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-(Ce) 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-(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
15 - WWW-MINCRYST

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

Rhabdophane-(Ce)

(Ce,La)PO4•(H2O)
Dana No: 40.04.07.01 Strunz No: 08.CJ.45
Locality:

 

Notes:

 

 
   
 


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