[Newest Minerals] [Minerals for Sale] [Educational Articles] [About Us] [Image Gallery] John Betts - Fine Minerals Classic minerals, out-of-print books & magazines, plus informative articles for collectors General Francoisite-(Nd) Information(Nd,Y,Sm,Ce)(UO2)3(PO4)2O(OH)•6(H2O) |
Molecular Weight = 1,243.40 gm |
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Cerium 0.45 % Ce 0.53 % Ce2O3 |
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Samarium 0.73 % Sm 0.84 % Sm2O3 |
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Yttrium 0.72 % Y 0.91 % Y2O3 |
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Uranium 61.26 % U 69.49 % UO2 |
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Phosphorus 4.73 % P 10.85 % P2O5 |
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Hydrogen 1.10 % H 9.85 % H2O |
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Neodymium 2.32 % Nd 2.71 % Nd2O3 |
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Oxygen 28.69 % O |
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100.00 % 95.17 % = TOTAL OXIDE |
Nd0.2Y0.1Sm0.06Ce0.04(UO2)3.2O(PO4)1.9(OH)•6.3(H2O) |
Alteration product of uraninite in a sedimentary Cu-Co deposit. |
Approved IMA 1988 |
Kamoto-East Cu-Co mine, 6 km east of Kolwezi, Katanga Province, Zaire. Link to MinDat.org Location Data. |
Named for Armand Francois (1922-), former Director of Geology for Gecamine and the dominant neodymium content. |
Francoisite-(Nd) + Pronunciation |
ICSD 202796 |
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PDF 42-1314 |
| | Search for Francoisite-(Nd) Images
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| | Francoisite-(Nd) Crystallographya:b:c =0.5958:1:0.8758 |
a = 9.298, b = 15.605, c = 13.668, Z = 4; beta = 112.77° V = 1,828.61 Den(Calc)= 4.52 |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/c |
By Intensity(I/Io): 7.79(1), 3.88(0.5), 5.76(0.5), |
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| Physical Properties of Francoisite-(Nd){010} Good |
Yellow. |
4.06 |
Translucent |
Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. |
Aggregates - Made of numerous individual crystals or clusters. |
Platy - Sheet forms (e.g. micas). |
3 - Calcite |
Radioactive. |
Vitreous (Glassy) |
yellow white |
| Optical Properties of Francoisite-(Nd)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 Biaxial (-), a=1.65, b=1.74, g=1.75, bire=0.1000, 2V(Calc)=34, 2V(Meas)=35. |
| Calculated Properties of Francoisite-(Nd)Bulk Density (Electron Density)=3.90 gm/cc |
note: Specific Gravity of Francoisite-(Nd) =4.52 gm/cc. Fermion Index = 0.01 |
Boson Index = 0.99 PEFrancoisite-(Nd) =1,632.17 barns/electron |
U=PEFrancoisite-(Nd) x relectron=6,370.39 barns/cc. |
GRapi = 4,512,101.50 (Gamma Ray American Petroleum Institute Units)
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) .
Weight of pure Francoisite-(Nd) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.52 gm/cc.* | Francoisite-(Nd) Classification42.04.14.01 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen |
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(42.04)where (AB)5 (XO4)2 Zq · x(H2O) |
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(42.04.14)Francoisite Group |
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08.EC.05 08 - PHOSPHATES, ARSENATES, VANADATES |
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08.E - Uranyl Phosphates and Arsenates |
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08.EC -UO2:RO4 = 3:2 |
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| Other Francoisite-(Nd) InformationNAME( AntBidBlaNic4) PHYS. PROP.(Am.Min.,Vol.75,p241,1990) OPTIC PROP.(Am.Min.,Vol.75,p241,1990) |
Links to other databases for Francoisite-(Nd) : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Google Images 5 - Google Scholar 6 - Handbook of Mineralogy (UofA) 7 - MinDAT 8 - MinMax(Deutsch) 9 - MinMax(English) 10 - Mineralienatlas (Deutsch) 11 - QUT Mineral Atlas 12 - Ruff.Info 13 - WWW-MINCRYST Search for Francoisite-(Nd) using: Visit our Advertisers for Francoisite-(Nd) : AA Mineral SpecimensB & L Fine Minerals Crystalarium.com Dan Weinrich Fine Minerals Dan Weinrich Auctions Dakota Matrix Desert Winds Gems and Minerals Excalibur Minerals Exceptional Minerals Fabre Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club Wrights Rock Shop Translate Francoisite-(Nd) Mineral Data : Ask about Francoisite-(Nd) here : Print or Cut-and-Paste your Francoisite-(Nd) Specimen Label here :
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