Mineralogy Database

Francoisite-(Nd) Mineral Data

Search Webmineral :
  

General Francoisite-(Nd) Information

Help on Chemical Formula: Chemical Formula: (Nd,Y,Sm,Ce)(UO2)3(PO4)2O(OH)•6(H2O)
Help on Composition: Composition: Molecular Weight = 1,243.40 gm
   Cerium       0.45 %  Ce    0.53 % Ce2O3
   Samarium     0.73 %  Sm    0.84 % Sm2O3
   Yttrium      0.72 %  Y     0.91 % Y2O3
   Uranium     61.26 %  U    69.49 % UO2
   Phosphorus   4.73 %  P    10.85 % P2O5
   Hydrogen     1.10 %  H     9.85 % H2O
   Neodymium    2.32 %  Nd    2.71 % Nd2O3
   Oxygen      28.69 %  O
              ______        ______ 
              100.00 %       95.17 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Nd0.2Y0.1Sm0.06Ce0.04(UO2)3.2O(PO4)1.9(OH)•6.3(H2O)
Help on Environment: Environment: Alteration product of uraninite in a sedimentary Cu-Co deposit.
Help on IMA Status: IMA Status: Approved IMA 1988
Help on Locality: Locality: Kamoto-East Cu-Co mine, 6 km east of Kolwezi, Katanga Province, Zaire. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Armand Francois (1922-), former Director of Geology for Gecamine and the dominant neodymium content.
Help on Name Pronunciation: Name Pronunciation: Francoisite-(Nd) + Pronunciation Say FRANCOISITE-(ND)
Help on Synonym: Synonym: ICSD 202796
  PDF 42-1314
 

Francoisite-(Nd) Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.5958:1:0.8758
Help on Cell Dimensions: Cell Dimensions: a = 9.298, b = 15.605, c = 13.668, Z = 4; beta = 112.77° V = 1,828.61 Den(Calc)= 4.52
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.79(1), 3.88(0.5), 5.76(0.5),
 

Physical Properties of Francoisite-(Nd)

Help on Cleavage: Cleavage: {010} Good
Help on Color: Color: Yellow.
Help on Density: Density: 4.06
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 3 - Calcite
Help on Luminescence: Luminescence: Radioactive.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: yellow white
 

Optical Properties of Francoisite-(Nd)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.352 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.215 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1578,KPDmeas= 0.1757,KC= 0.1299
Ncalc = 1.53 - 1.59
Help on Optical Data: Optical Data: Biaxial (-), a=1.65, b=1.74, g=1.75, bire=0.1000, 2V(Calc)=34, 2V(Meas)=35.
 

Calculated Properties of Francoisite-(Nd)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.90 gm/cc
note: Specific Gravity of Francoisite-(Nd) =4.52 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEFrancoisite-(Nd) =1,632.17 barns/electron
U=PEFrancoisite-(Nd) x relectron=6,370.39 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 4,512,101.50 (Gamma Ray American Petroleum Institute Units)
Concentration of Francoisite-(Nd) per GRapi unit = 221.63 (PPB)

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

Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 10 cm box) 6.74 ± 1.69 grams of pure Francoisite-(Nd) .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 674.11 ±168.53 grams of pure Francoisite-(Nd) .

Estimated Radioactivity from Francoisite-(Nd) - very strong
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 / 7.50 cm 109,732,395 2.97E-03 4,512,101.50 1,483.43
100 gm / 3.48 cm 10,973,240 2.97E-04 451,210.15 148.34
10 gm / 1.62 cm 1,097,324 2.97E-05 45,121.02 14.83
1 gm / 7.50 mm 109,732 2.97E-06 4,512.10 1.48
0.1 gm / 3.48 mm 10,973 2.97E-07 451.21 0.15
0.01 gm / 1.62 mm 1,097 2.97E-08 45.12 0.01
0.001 gm / 0.75 mm 110 2.97E-09 4.51 0.00

Weight of pure Francoisite-(Nd) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.52 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 ( 0.17 % Th) From Sum REE Elements ( 3.50 % REE)
 

Francoisite-(Nd) Classification
Help on Dana Class: Dana Class: 42.04.14.01 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.04)where (AB)5 (XO4)2 Zq � x(H2O)
  (42.04.14)Francoisite Group
 
42.04.14.01 Francoisite-(Nd) (Nd,Y,Sm,Ce)(UO2)3(PO4)2O(OH)•6(H2O) P 21/c 2/m
 
42.04.14.02 Francoisite-(Ce)! (Ce,Nd,Ca)[(UO2)3O(OH)(PO4)2]•6(H2O) P 21/c 2/m
Help on Strunz Class: Strunz Class: 08.EC.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.E - Uranyl Phosphates and Arsenates
  08.EC -UO2:RO4 = 3:2
 
08.EC.05 Francoisite-(Nd) (Nd,Y,Sm,Ce)(UO2)3(PO4)2O(OH)•6(H2O) P 21/c 2/m
 
08.EC.05 Phuralumite Al2(UO2)3(PO4)2(OH)6•10(H2O) P 21/a 2/m
 
08.EC.05 Upalite Al(UO2)3(PO4)2O(OH)•7(H2O) P 21/a 2/m
 
08.EC.05 Francoisite-(Ce)! (Ce,Nd,Ca)[(UO2)3O(OH)(PO4)2]•6(H2O) P 21/c 2/m
 

Other Francoisite-(Nd) Information
Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Am.Min.,Vol.75,p241,1990) OPTIC PROP.(Am.Min.,Vol.75,p241,1990)
Help on See Also: See Also: Links to other databases for Francoisite-(Nd) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
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
13 - WWW-MINCRYST

Search for Francoisite-(Nd) using:

Google
 
Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Francoisite-(Nd) :

Ask about Francoisite-(Nd) here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espa�ol

Print or Cut-and-Paste your Francoisite-(Nd) Specimen Label here :

Francoisite-(Nd)

(Nd,Y,Sm,Ce)(UO2)3(PO4)2O(OH)•6(H2O)
Dana No: 42.04.14.01 Strunz No: 08.EC.05
Locality:

 

Notes:

 
 
   
 

Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.