Florencite-(Ce) Mineral Data

Florencite-(Ce) Mineral Data
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General Florencite-(Ce) Information

Help on Chemical Formula: Chemical Formula: CeAl3(PO4)2(OH)6
Help on Composition: Composition: Molecular Weight = 513.05 gm
   Cerium      27.31 %  Ce   31.99 % Ce2O3
   Aluminum    15.78 %  Al   29.81 % Al2O3
   Phosphorus  12.07 %  P    27.67 % P2O5
   Hydrogen     1.18 %  H    10.53 % H2O
   Oxygen      43.66 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CeAl3(PO4)2(OH)6
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1899
Help on Locality: Locality: Diamantina, Ouro Preto, Minas Gerais, Brazil. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for W. Florence and its cerium content.
Help on Name Pronunciation: Name Pronunciation: Florencite-(Ce) + Pronunciation Say FLORENCITE-(CE)
Help on Synonym: Synonym: ICSD 69214
  Koivinite
  PDF 8-143
 

Florencite-(Ce) Image

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Florencite-(Ce)

Comments: Butterscotch colored florencite-(Ce) on a quartz crystal.
Location: Brumado, Bahia, Brazil. Scale: Crystal size 4 mm.
© John Veevaert

Florencite-(Ce) Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:2.34585
Help on Cell Dimensions: Cell Dimensions: a = 6.974, c = 16.36, Z = 3; V = 689.09 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): 2.95(1), 3.5(0.7), 5.71(0.7),
 

Physical Properties of Florencite-(Ce)

Help on Cleavage: Cleavage: {0001} Good
Help on Color: Color: Colorless, Gray, Light yellow, Pink.
Help on Density: Density: 3.457 - 3.71, Average = 3.58
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
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-(Ce)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.094 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.057 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2053,KPDmeas= 0.2125,KC= 0.1942
Ncalc = 1.67 - 1.72
Help on Optical Data: Optical Data: Uniaxial (+), w=1.747, e=1.776, bire=0.0290.
 

Calculated Properties of Florencite-(Ce)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.54 gm/cc
note: Specific Gravity of Florencite-(Ce) =3.71 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.000211332
Boson Index = 0.999788668
Help on Photoelectric: Photoelectric: PEFlorencite-(Ce) = 133.13 barns/electron
U=PEFlorencite-(Ce) x relectron= 471.71 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 27,822.51 (Gamma Ray American Petroleum Institute Units)
Concentration of Florencite-(Ce) per GRapi unit = 35.94 (PPM)

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

Estimated Radioactivity from Florencite-(Ce) - weak
Specimen
Size
Weight/Volume
(Sphere) *		 Calculated
Activity
Becquerels
(Bq)		 Calculated
Activity
Curies (Ci)		 Estimated
Activity
GR(api)		 Estimated
Exposure
(mRem**)/hr
If Held in Hand
For One Hour
1000 gm / 8.01 cm 611,753 1.65E-05 27,822.51 9.15
100 gm / 3.72 cm 61,175 1.65E-06 2,782.25 0.91
10 gm / 1.73 cm 6,118 1.65E-07 278.23 0.09
1 gm / 8.01 mm 612 1.65E-08 27.82 0.01
0.1 gm / 3.72 mm 61 1.65E-09 2.78 0.00
0.01 gm / 1.73 mm 6 1.65E-10 0.28 0.00
0.001 gm / 0.80 mm 1 1.65E-11 0.03 0.00

Weight of pure Florencite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.71 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 ( 1.37 % Th) From Sum REE Elements (27.31 % REE)
 

Florencite-(Ce) Classification
Help on Dana Class: Dana Class: 41.05.10.02 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.05)where (A B)2 (XO4) Zq
  (41.05.10)Dussertite Group
 
41.05.10.01 Dussertite BaFe3(AsO4)2(OH)5 R 3m 3m
 
41.05.10.02 Florencite-(Ce) CeAl3(PO4)2(OH)6 R 3m 3 2/m
 
41.05.10.03 Florencite-(La) (La,Ce)Al3(PO4)2(OH)6 R 3m 3 2/m
 
41.05.10.04 Florencite-(Nd) (Nd,Ce)Al3(PO4)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 Florencite-(Ce) 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-(Ce) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - WWW-MINCRYST

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

Florencite-(Ce)

CeAl3(PO4)2(OH)6
Dana No: 41.05.10.02 Strunz No: 08.BL.13
Locality:

 

Notes: