Florencite-(La) Mineral Data + Say FLORENCITE-(LA)


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General Florencite-(La) Information
Help on Chemical Formula: Chemical Formula: (La,Ce)Al3(PO4)2(OH)6
Help on Composition: Composition: Molecular Weight = 512.14 gm
   Lanthanum   20.34 %  La   23.86 % La2O3
   Cerium       6.84 %  Ce    8.01 % Ce2O3
   Aluminum    15.81 %  Al   29.86 % Al2O3
   Phosphorus  12.10 %  P    27.72 % P2O5
   Hydrogen     1.18 %  H    10.55 % H2O
   Oxygen      43.74 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: La0.75Ce0.25Al3(PO4)2(OH)6
Help on IMA Status: IMA Status: Approved IMA 1981
Help on Locality: Locality: Shituru deposit, Likasi, Katanga (Shaba), Congo (Zaïre). Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for W. Florence and its lanthanum content.
 

Florencite-(La) Image

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Florencite-(La)

Comments: Green, acicular crystalline aggregates of florencite-(La).
Location: Igarap? Bahia Mine, Caraj?s ridge, Par?, North Region, Brazil. Scale: Picture size 4.5 mm.
© Thomas Witzke / Abraxas-Verlag

Florencite-(La) Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:2.32546
Help on Cell Dimensions: Cell Dimensions: a = 6.987, c = 16.248, Z = 3; V = 686.93 Den(Calc)= 3.71
Help on Crystal System: Crystal System: Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.93(1), 5.67(0.9), 2.171(0.8),
 

Physical Properties of Florencite-(La)

Help on Cleavage: Cleavage: [0001] Good
Help on Color: Color: Colorless, Light yellow.
Help on Density: Density: 3.52
Help on Diaphaniety: Diaphaniety: Transparent
Help on Hardness: Hardness: 5-6 - Between Apatite and Orthoclase
Help on Luster: Luster: Resinous - Greasy
Help on Streak: Streak: white
 

Optical Properties of Florencite-(La)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.015 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.037 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.188,KPDmeas= 0.1982,KC= 0.1953
Help on Optical Data: Optical Data: Uniaxial (+), w=1.694, e=1.701, bire=0.0070.
 

Calculated Properties of Florencite-(La)

Help on Electron Density: Electron Density:

relectron=3.36 gm/cc
note: rFlorencite-(La) =3.52 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.00039
Boson Index = 0.99961
Help on Photoelectric: Photoelectric:

PEFlorencite-(La) = 125.90 barns/electron
U=PEFlorencite-(La) x relectron= 422.71 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 27,655.46 (Gamma Ray American Petroleum Institute Units)

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

Estimated Radioactivity from Florencite-(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 / 8.16 cm 608,869 1.65E-05 27,655.46 9.09
100 gm / 3.79 cm 60,887 1.65E-06 2,765.55 0.91
10 gm / 1.76 cm 6,089 1.65E-07 276.55 0.09
1 gm / 8.16 mm 609 1.65E-08 27.66 0.01
0.1 gm / 3.79 mm 61 1.65E-09 2.77 0.00
0.01 gm / 1.76 mm 6 1.65E-10 0.28 0.00
0.001 gm / 0.82 mm 1 1.65E-11 0.03 0.00

Weight of pure Florencite-(La) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.52 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 ( 1.36 % Th) From Sum REE Elements (27.18 % REE)
 

Florencite-(La) Classification
Help on Dana Class: Dana Class: 41.5.10.3 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.5)where (A B)2 (XO4) Zq
  (41.5.10)Dana Group
 
41.5.10.1 Dussertite BaFe3(AsO4)2(OH)5 R 3m 3m
 
41.5.10.2 Florencite-(Ce) CeAl3(PO4)2(OH)6 R 3m 3 2/m
 
41.5.10.3 Florencite-(La) (La,Ce)Al3(PO4)2(OH)6 R 3m 3 2/m
 
41.5.10.4 Florencite-(Nd) (Nd,Ce)Al3(PO4)2(OH)6 R 3m 3 2/m
Help on Strunz Class: Strunz Class: VII/B.36-130 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 Florencite-(La) Information
Help on References: References: 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 Florencite-(La) :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 -École des Mines de Paris

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Florencite-(La)

(La,Ce)Al3(PO4)2(OH)6
Dana No: 41.5.10.3 Strunz No: VII/B.36-130
Locality:

 

Notes:

 
 
   
 
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