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Arsenoflorencite-(Ce) Mineral Data

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General Arsenoflorencite-(Ce) Information

Help on Chemical  Formula: Chemical Formula: (Ce,La)Al3(AsO4)2(OH)6
Help on Composition: Composition: Molecular Weight = 588.17 gm
   Lanthanum         7.08 %  La    8.31 % La2O3
   Cerium           11.91 %  Ce   13.95 % Ce2O3
   La,Ce,Pr,Nd,Sm,   4.90 %  RE    5.71 % REE2O3
   Aluminum         13.76 %  Al   26.00 % Al2O3
   Arsenic          21.65 %  As   33.22 % As2O5
   Phosphorus        1.58 %  P     3.62 % P2O5
   Hydrogen          1.03 %  H     9.19 % H2O
   Oxygen           38.08 %  O
                   ______        ______ 
                   100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ce0.5La0.3REE0.2Al3(AsO4)1.7(PO4)0.3(OH)6
Help on Environment: Environment: Detrital grains in a heavy mineral concentrates.
Help on IMA Status: IMA Status: Approved IMA 1987
Help on Locality: Locality: Kimba, Eyre Peninsula, South Australia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the arsenic analog of florencite and the dominant rare earth element, cerium.
Help on Name Pronunciation: Name Pronunciation: Arsenoflorencite-(Ce) + Pronunciation Say ARSENOFLORENCITE-(CE)
 

Arsenoflorencite-(Ce) Image

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  Arsenoflorencite-(Ce)

Comments: SEM image of euhedral crystal of arsenoflorencite-(Ce). (MinMag, v51:605).
Location: Stream-sediment sample taken on the Kimba 1:250000 mapsheet on the Eyre Peninsula in South Australia. Scale: See Image.
© Mineralogical Magazine

Arsenoflorencite-(Ce) Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.34983
Help on Cell Dimensions: Cell Dimensions: a = 7.029, c = 16.517, Z = 3; V = 706.72 Den(Calc)= 4.15
Help on Crystal System: Crystal System: Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.963(1), 3.513(0.6), 1.905(0.5),
 

Physical Properties of Arsenoflorencite-(Ce)

Help on Cleavage: Cleavage: None
Help on Color: Color: White, Pale brown, Colorless.
Help on Density: Density: 4.096
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Subhedral Crystals - Occurs as crystals which tend to exhibit a recognizable crystal shape.
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Arsenoflorencite-(Ce)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.023 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.035 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1788,KPDmeas= 0.1812,KC= 0.1853
Ncalc = 1.76 - 1.77
Help on Optical Data: Optical Data: Uniaxial (+), w=1.739, e=1.745, bire=0.0060.
 

Calculated Properties of Arsenoflorencite-(Ce)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.84 gm/cc
note: Specific Gravity of Arsenoflorencite-(Ce) =4.10 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0093583653
Boson Index = 0.9906416347
Help on Photoelectric: Photoelectric: PEArsenoflorencite-(Ce) = 136.12 barns/electron
U=PEArsenoflorencite-(Ce) x relectron= 523.09 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 23,926.95 (Gamma Ray American Petroleum Institute Units)
Concentration of Arsenoflorencite-(Ce) per GRapi unit = 41.79 (PPM)

Arsenoflorencite-(Ce) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Radioactivity from Arsenoflorencite-(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 / 7.75 cm 535,586 1.45E-05 23,926.95 7.87
100 gm / 3.60 cm 53,559 1.45E-06 2,392.70 0.79
10 gm / 1.67 cm 5,356 1.45E-07 239.27 0.08
1 gm / 7.75 mm 536 1.45E-08 23.93 0.01
0.1 gm / 3.60 mm 54 1.45E-09 2.39 0.00
0.01 gm / 1.67 mm 5 1.45E-10 0.24 0.00
0.001 gm / 0.78 mm 1 1.45E-11 0.02 0.00

Weight of pure Arsenoflorencite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.10 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 ( 1.19 % Th) From Sum REE Elements (23.89 % REE)
 

Arsenoflorencite-(Ce) Classification

Help on  Dana Class: Dana Class: 41.05.11.01 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.05)where (A B)2 (XO4) Zq
  (41.05.11)Arsenoflorencite Group
 
41.05.11.01 Arsenoflorencite-(Ce) (Ce,La)Al3(AsO4)2(OH)6 R 3m 3 2/m
 
41.05.11.02 Arsenoflorencite-(Nd)* (Nd,La,Ce,Ba)(Al,Fe)3(AsO4,PO4)2(OH)6 R 3m 3m
 
41.05.11.03 Arsenoflorencite-(La)* (La,Sr)Al3(AsO4,SO4,PO4)2(OH)6 R 3m 3m
 
41.05.11.04 Graulichite-(Ce)! CeFe3(AsO4)2(OH)6 R 3m 3 2/m
Help on  Strunz Class: Strunz Class: 08.BL.13 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BL -With medium-sized and large cations, (OH, etc.):RO4 = 3:1
 
08.BL.13 Arsenoflorencite-(Ce) (Ce,La)Al3(AsO4)2(OH)6 R 3m 3 2/m
 
08.BL.13 Eylettersite (Th,Pb)1-xAl3(PO4,SiO4)2(OH)6(?) R 3m 3 2/m
 
08.BL.13 Arsenoflorencite-(La)* (La,Sr)Al3(AsO4,SO4,PO4)2(OH)6 R 3m 3m
 
08.BL.13 Arsenoflorencite-(Nd)* (Nd,La,Ce,Ba)(Al,Fe)3(AsO4,PO4)2(OH)6 R 3m 3m
 
08.BL.13 Florencite-(Ce) CeAl3(PO4)2(OH)6 R 3m 3 2/m
 
08.BL.13 Florencite-(La) (La,Ce)Al3(PO4)2(OH)6 R 3m 3 2/m
 
08.BL.13 Florencite-(Nd) (Nd,Ce)Al3(PO4)2(OH)6 R 3m 3 2/m
 
08.BL.13 Graulichite-(Ce)! CeFe3(AsO4)2(OH)6 R 3m 3 2/m
 
08.BL.13 Waylandite BiAl3(PO4)2(OH)6 R 3m 3 2/m
 
08.BL.13 Zairite Bi(Fe,Al)3(PO4)2(OH)6 R 3m 3 2/m
 

Other Arsenoflorencite-(Ce) Information

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(AntBidBlaNic4) OPTIC PROP.(AntBidBlaNic4)
Help on See Also: See Also: Links to other databases for Arsenoflorencite-(Ce) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Ecole des Mines de Paris
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 Arsenoflorencite-(Ce) Specimen Label here :

Arsenoflorencite-(Ce)

(Ce,La)Al3(AsO4)2(OH)6
Dana No: 41.05.11.01 Strunz No: 08.BL.13
Locality:

 

Notes:

 

 
   
 


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