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Arsenoflorencite-(La) Mineral Data

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General Arsenoflorencite-(La) Information

Help on Chemical  Formula: Chemical Formula: (La,Sr)Al3(AsO4,SO4,PO4)2(OH)6
Help on Composition: Composition: Molecular Weight = 564.57 gm
   Strontium         3.10 %  Sr    3.67 % SrO
   Lanthanum        12.30 %  La   14.43 % La2O3
   Cerium            2.48 %  Ce    2.91 % Ce2O3
   La,Ce,Pr,Nd,Sm,   5.10 %  RE    5.95 % REE2O3
   Aluminum         14.34 %  Al   27.09 % Al2O3
   Arsenic          18.58 %  As   28.50 % As2O5
   Phosphorus        1.65 %  P     3.77 % P2O5
   Hydrogen          1.07 %  H     9.57 % H2O
   Sulfur            1.70 %  S     4.25 % SO3
   Oxygen           39.67 %  O
                   ______        ______ 
                   100.00 %      100.14 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: La0.5Sr0.2Ce0.1REE0.2Al3(AsO4)1.4(SO4)0.3(PO4)0.3(OH)6
Help on IMA Status: IMA Status: Not Approved IMA 1991
Help on Locality: Locality: 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, Lanthanum.
Help on Name Pronunciation: Name Pronunciation: Arsenoflorencite-(La) + Pronunciation Say ARSENOFLORENCITE-(LA)
 

Arsenoflorencite-(La) Image

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  Arsenoflorencite-(La)

Comments: BSE image of four grains of orange-red Arsenoflorencite-(La) from heavy concentrates of gold-bearing sedimentary rocks.
Location: Grubependity Lake, Maldinskii Region, Prepolar Ural, Russia. Scale: See Image.
© Diederik Visser

Arsenoflorencite-(La) Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.38285
Help on Cell Dimensions: Cell Dimensions: a = 7, c = 16.68, Z = 3; V = 707.82 Den(Calc)= 3.97
Help on Crystal System: Crystal System: Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.95(1), 3.51(0.6), 5.65(0.55),
 

Physical Properties of Arsenoflorencite-(La)

Help on Color: Color: White.
Help on Density: Density: 4.1 - 4.2, Average = 4.15
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Arsenoflorencite-(La)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.044 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.001 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1877,KPDmeas= 0.1795,KC= 0.1878
Ncalc = 1.75 - 1.79
Help on Optical Data: Optical Data: Uniaxial (+), w=1.74, e=1.75, bire=0.0100.
 

Calculated Properties of Arsenoflorencite-(La)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.75 gm/cc
note: Specific Gravity of Arsenoflorencite-(La) =3.97 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEArsenoflorencite-(La) = 115.60 barns/electron
U=PEArsenoflorencite-(La) x relectron= 433.41 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 20,050.17 (Gamma Ray American Petroleum Institute Units)
Concentration of Arsenoflorencite-(La) per GRapi unit = 49.87 (PPM)

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

Estimated Radioactivity from Arsenoflorencite-(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 / 7.84 cm 445,829 1.20E-05 20,050.17 6.59
100 gm / 3.64 cm 44,583 1.20E-06 2,005.02 0.66
10 gm / 1.69 cm 4,458 1.20E-07 200.50 0.07
1 gm / 7.84 mm 446 1.20E-08 20.05 0.01
0.1 gm / 3.64 mm 45 1.20E-09 2.01 0.00
0.01 gm / 1.69 mm 4 1.20E-10 0.20 0.00
0.001 gm / 0.78 mm 0 1.20E-11 0.02 0.00

Weight of pure Arsenoflorencite-(La) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.97 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 ( 0.99 % Th) From Sum REE Elements (19.88 % REE)
 

Arsenoflorencite-(La) Classification

Help on  Dana Class: Dana Class: 41.05.11.03 (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-(La) Information

Help on References: References: PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(37th List of New Min.,Min. Mag.,19)
Help on See Also: See Also: Links to other databases for Arsenoflorencite-(La) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Ecole des Mines de Paris
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info

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

Arsenoflorencite-(La)

(La,Sr)Al3(AsO4,SO4,PO4)2(OH)6
Dana No: 41.05.11.03 Strunz No: 08.BL.13
Locality:

 

Notes:

 

 
   
 


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