Mineralogy Database

Fergusonite-(Ce) Mineral Data

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General Fergusonite-(Ce) Information

Help on Chemical  Formula: Chemical Formula: (Ce,La,Y)NbO4
Help on Composition: Composition: Molecular Weight = 296.94 gm
   Lanthanum  14.03 %  La   16.46 % La2O3
   Cerium     28.31 %  Ce   33.16 % Ce2O3
   Yttrium     2.99 %  Y     3.80 % Y2O3
   Niobium    31.29 %  Nb   44.76 % Nb2O5
   Hydrogen    0.20 %  H     1.82 % H2O
   Oxygen     23.17 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ce0.6La0.3Y0.1NbO4•0.3(H2O)
Help on Environment: Environment: In a carbonatite.
Help on IMA Status: IMA Status: Not Approved IMA 1986
Help on Locality: Locality: Novopoltavsk massif [Cherigovsky massif, Azov Sea area], Ukraine. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For the relationship to fergusonite-(Y) and the cerium content.
Help on Name Pronunciation: Name Pronunciation: Fergusonite-(Ce) + Pronunciation Say FERGUSONITE-(CE)
 

Fergusonite-(Ce) Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.02514
Help on Cell Dimensions: Cell Dimensions: a = 5.17, c = 5.3, Z = 2; V = 141.66 Den(Calc)= 6.96
Help on Crystal System: Crystal System: Tetragonal - Dipyramidal H-M Symbol (4/m) Space Group: I 41/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.1(1), 1.882(0.9), 1.631(0.5),1.566(0.4), 2.6(0.3), 3.5(0.2), 2.76(0.2),
 

Physical Properties of Fergusonite-(Ce)

Help on Cleavage: Cleavage: {???} Indistinct
Help on Color: Color: Dark red, Black.
Help on Density: Density: 5.48
Help on Diaphaneity: Diaphaneity: Translucent to Opaque
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 5.5-6.5 - Knife Blade-Pyrite
Help on Luster: Luster: Vitreous - Metallic
Help on Streak: Streak: reddish brown
 

Optical Properties of Fergusonite-(Ce)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.114 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.123 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1796,KPDmeas= 0.2281,KC= 0.2047
Ncalc = 2.12 - 2.42
Help on Optical Data: Optical Data: Uniaxial (-), e=2.2, w=2.3, bire=0.1000.
 

Calculated Properties of Fergusonite-(Ce)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.86 gm/cc
note: Specific Gravity of Fergusonite-(Ce) =5.48 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0002378191
Boson Index = 0.9997621809
Help on Photoelectric: Photoelectric: PEFergusonite-(Ce) = 268.98 barns/electron
U=PEFergusonite-(Ce) x relectron=1,308.53 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 40,097.09 (Gamma Ray American Petroleum Institute Units)
Concentration of Fergusonite-(Ce) per GRapi unit = 24.94 (PPM)

Fergusonite-(Ce) 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) 758.58 ±189.64 grams of pure Fergusonite-(Ce) .

Estimated Radioactivity from Fergusonite-(Ce) - 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 / 7.04 cm 948,539 2.56E-05 40,097.09 13.18
100 gm / 3.27 cm 94,854 2.56E-06 4,009.71 1.32
10 gm / 1.52 cm 9,485 2.56E-07 400.97 0.13
1 gm / 7.04 mm 949 2.56E-08 40.10 0.01
0.1 gm / 3.27 mm 95 2.56E-09 4.01 0.00
0.01 gm / 1.52 mm 9 2.56E-10 0.40 0.00
0.001 gm / 0.70 mm 1 2.56E-11 0.04 0.00

Weight of pure Fergusonite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.48 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 ( 2.12 % Th) From Sum REE Elements (42.35 % REE)
 

Fergusonite-(Ce) Classification

Help on  Dana Class: Dana Class: 08.01.01.03 (08)Multiple Oxides with Nb, Ta, and Ti
  (08.01)where A BO4
  (08.01.01)Fergusonite Group (Tetragonal)
 
08.01.01.01 Fergusonite-(Y) YNbO4 I 41/a 4/m
 
08.01.01.02 Formanite-(Y) YTaO4 I 41/a 4/m
 
08.01.01.03 Fergusonite-(Ce)* (Ce,La,Y)NbO4 I 41/a 4/m
 
08.01.01.04 Fergusonite-(Nd)* (Nd,Ce)(Nb,Ti)O4 I 41/a 4/m
Help on  Strunz Class: Strunz Class: 07.GA.05 07 - SULFATES (SELENATES, TELLURATES)
  07.G - Molybdates, Wolframates and Niobates
  07.GA -Without additional anions or H2O
 
07.GA.05 Fergusonite-(Ce)* (Ce,La,Y)NbO4 I 41/a 4/m
 
07.GA.05 Fergusonite-(Nd)* (Nd,Ce)(Nb,Ti)O4 I 41/a 4/m
 
07.GA.05 Fergusonite-(Y) YNbO4 I 41/a 4/m
 
07.GA.05 Stolzite PbWO4 I 41/a 4/m
 
07.GA.05 Scheelite CaWO4 I 41/a 4/m
 
07.GA.05 Powellite CaMoO4 I 41/a 4/m
 
07.GA.05 Wulfenite PbMoO4 I 41/a 4/m
 

Other Fergusonite-(Ce) Information

Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(Am.Min.,Vol.74,p946,1989) OPTIC PROP.(Am.Min.,Vol.74,p946,1989)
Help on See Also: See Also: Links to other databases for Fergusonite-(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

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

Fergusonite-(Ce)

(Ce,La,Y)NbO4
Dana No: 08.01.01.03 Strunz No: 07.GA.05
Locality:

 

Notes:

 

 
   
 


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