Arsenoflorencite-(La) Mineral Data + Say ARSENOFLORENCITE-(LA)


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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.
 

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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 PyramidalH-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 Diaphaniety: Diaphaniety: 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
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:

relectron=3.75 gm/cc
note: rArsenoflorencite-(La) =3.97 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.01209
Boson Index = 0.98791
Help on Photoelectric: Photoelectric:

PEArsenoflorencite-(La) = 115.60 barns/electron
U=PEArsenoflorencite-(La) x relectron= 433.41 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 20,050.16 (Gamma Ray American Petroleum Institute Units)

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 20,050.16 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: 41.5.11.3 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.5)where (A B)2 (XO4) Zq
  (41.5.11)Dana Group
 
41.5.11.1 Arsenoflorencite-(Ce) (Ce,La)Al3(AsO4)2(OH)6 R 3m 3 2/m
 
41.5.11.2 Arsenoflorencite-(Nd)* (Nd,La,Ce,Ba)(Al,Fe)3(AsO4,PO4)2(OH)6 R 3m 3m
 
41.5.11.3 Arsenoflorencite-(La) * (La,Sr)Al3(AsO4,SO4,PO4)2(OH)6 R 3m 3m
 
41.5.11.4 Graulichite-(Ce)! CeFe3(AsO4)2(OH)6 R 3m 3 2/m
Help on Strunz Class: Strunz Class: VII/B.36-125 VII - Phosphates, Arsenates and Vanadates
  VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O, OH. cations of medium and big size: Mg, Cu, Zn, and Ca, Na, K, Ba, Pb
  VII/B.36 - Crandallite group
 
VII/B.36-10 Crandallite CaAl3(PO4)2(OH)5·(H2O) R 3m 3 2/m
 
VII/B.36-20 Arsenocrandallite (Ca,Sr)Al3[(As,P)O4]2(OH)5·(H2O) R 3m 3m
 
VII/B.36-30 Goyazite SrAl3(PO4)2(OH)5·(H2O) R 3m 3 2/m
 
VII/B.36-40 Arsenogoyazite (Sr,Ca,Ba)Al3(AsO4,PO4)2(OH,F)5·(H2O) R 3m 3 2/m
 
VII/B.36-50 Gorceixite BaAl3(PO4)(PO3OH)(OH)6 Cm m
 
VII/B.36-60 Arsenogorceixite! BaAl3AsO3(OH)(AsO4,PO4)(OH,F)6 R 3m 3 2/m
 
VII/B.36-70 Plumbogummite PbAl3(PO4)2(OH)5·(H2O) R 3m 3 2/m
 
VII/B.36-80 Philipsbornite PbAl3(AsO4)2(OH)5·(H2O) R 3m-,R 3m Trig
 
VII/B.36-90 Waylandite BiAl3(PO4)2(OH)6 R 3m 3 2/m
 
VII/B.36-100 Eylettersite (Th,Pb)1-xAl3(PO4,SiO4)2(OH)6(?) R 3m 3 2/m
 
VII/B.36-110 Florencite-(Ce) CeAl3(PO4)2(OH)6 R 3m 3 2/m
 
VII/B.36-120 Arsenoflorencite-(Ce) (Ce,La)Al3(AsO4)2(OH)6 R 3m 3 2/m
 
VII/B.36-125 Arsenoflorencite-(La) (La,Sr)Al3(AsO4,SO4,PO4)2(OH)6 R 3m 3m
 
VII/B.36-130 Florencite-(La) (La,Ce)Al3(PO4)2(OH)6 R 3m 3 2/m
 
VII/B.36-135 Arsenoflorencite-(Nd)* (Nd,La,Ce,Ba)(Al,Fe)3(AsO4,PO4)2(OH)6 R 3m 3m
 
VII/B.36-140 Florencite-(Nd) (Nd,Ce)Al3(PO4)2(OH)6 R 3m 3 2/m
 
VII/B.36-150 Benauite! HSrFe3(PO4)2(OH)6 R 3m 3 2/m
 
VII/B.36-150* Lusungite? (Sr,Pb)Fe3(PO4)2(OH)5·(H2O) R 3m 3m
 
VII/B.36-152 Graulichite-(Ce)! CeFe3(AsO4)2(OH)6 R 3m 3 2/m
 
VII/B.36-155 Springcreekite! BaV3(PO4)2(OH,H2O)6 R 3m 3 2/m
 
VII/B.36-160 Dussertite BaFe3(AsO4)2(OH)5 R 3m 3m
 
VII/B.36-170 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 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas 10 -École des Mines de Paris

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Arsenoflorencite-(La)

(La,Sr)Al3(AsO4,SO4,PO4)2(OH)6
Dana No: 41.5.11.3 Strunz No: VII/B.36-125
Locality:

 

Notes:

 
 
   
 
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