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Fergusonite-beta-(Nd) Mineral Data

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General Fergusonite-beta-(Nd) Information

Help on Chemical  Formula: Chemical Formula: (Nd,Ce)NbO4
Help on Composition: Composition: Molecular Weight = 285.36 gm
   Cerium         14.73 %  Ce   17.25 % Ce2O3
   Praeseodymium   4.94 %  Pr    5.78 % Pr2O3
   Samarium        5.27 %  Sm    6.11 % Sm2O3
   Yttrium         3.12 %  Y     3.96 % Y2O3
   Niobium        29.30 %  Nb   41.92 % Nb2O5
   Neodymium      20.22 %  Nd   23.58 % Nd2O3
   Oxygen         22.43 %  O
                 ______        ______ 
                 100.00 %       98.60 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Nd0.4Ce0.3Pr0.1Sm0.1Y0.1Nb0.9O4
Help on Environment: Environment: In sodium-metasomatized carbonatite-derived dolomitic marble.
Help on IMA Status: IMA Status: Approved IMA 1984
Help on Locality: Locality: Bayan Obo Fe-Nb-REE deposit, 130 km north of Baotou, Inner Mongolia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the dimorphous relationship to fergusonite-(Nd).
Help on Name Pronunciation: Name Pronunciation: Fergusonite-beta-(Nd) + Pronunciation Say FERGUSONITE-BETA-(ND)
 

Fergusonite-beta-(Nd) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9021:1:0.9626
Help on Cell Dimensions: Cell Dimensions: a = 5.07, b = 5.62, c = 5.41, Z = 2; beta = 93° V = 153.94 Den(Calc)= 6.16
Help on Crystal System: Crystal System: Monoclinic - Sphenoidal H-M Symbol (2) Space Group: I2
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.0253(1), 3.2064(1), 2.7976(0.5),
 

Physical Properties of Fergusonite-beta-(Nd)

Help on Color: Color: Brownish red, Red, Yellow brown, Orange.
Help on Density: Density: 6.45
Help on Diaphaneity: Diaphaneity: Translucent to Opaque
Help on Fracture: Fracture: Brittle - Subconchoidal - Brittle frature with subconchoidal fragments
Help on Habit: Habit: Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.
Help on Habit: Habit: Metamict - Mineral originally crystalline, now amorphous due to radiation damage.
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 - Greasy
Help on Streak: Streak: pale brown
 

Optical Properties of Fergusonite-beta-(Nd)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.194 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.156 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1623,KPDmeas= 0.155,KC= 0.1923
Ncalc = 2.18 - 2.24
Help on Optical Data: Optical Data: Isotropic, n=2.
 

Calculated Properties of Fergusonite-beta-(Nd)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.45 gm/cc
note: Specific Gravity of Fergusonite-beta-(Nd) =6.16 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PEFergusonite-beta-(Nd) = 309.97 barns/electron
U=PEFergusonite-beta-(Nd) x relectron=1,690.22 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 42,918.54 (Gamma Ray American Petroleum Institute Units)
Concentration of Fergusonite-beta-(Nd) per GRapi unit = 23.30 (PPM)

Fergusonite-beta-(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) 708.71 ±177.18 grams of pure Fergusonite-beta-(Nd) .

Estimated Radioactivity from Fergusonite-beta-(Nd) - 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 / 6.77 cm 1,018,183 2.75E-05 42,918.54 14.11
100 gm / 3.14 cm 101,818 2.75E-06 4,291.85 1.41
10 gm / 1.46 cm 10,182 2.75E-07 429.19 0.14
1 gm / 6.77 mm 1,018 2.75E-08 42.92 0.01
0.1 gm / 3.14 mm 102 2.75E-09 4.29 0.00
0.01 gm / 1.46 mm 10 2.75E-10 0.43 0.00
0.001 gm / 0.68 mm 1 2.75E-11 0.04 0.00

Weight of pure Fergusonite-beta-(Nd) in grams (gm) and Calculated Diameter of a Sphere with a Density of 6.16 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 ( 2.26 % Th) From Sum REE Elements (45.16 % REE)
 

Fergusonite-beta-(Nd) Classification

Help on  Dana Class: Dana Class: 08.01.02.03 (08)Multiple Oxides with Nb, Ta, and Ti
  (08.01)where A BO4
  (08.01.02)Fergusonite-beta Grup (Monoclinic)
 
08.01.02.01 Fergusonite-beta-(Y) YNbO4 I2 2
 
08.01.02.02 Fergusonite-beta-(Ce) (Ce,La,Nd)NbO4 I2 2
 
08.01.02.03 Fergusonite-beta-(Nd) (Nd,Ce)NbO4 I2 2
Help on  Strunz Class: Strunz Class: 04.DG.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.D - Metal:Oxygen = 1:2 and similar
  04.DG -With large (� medium-sized) cations; chains of edge-sharing octahedra
 
04.DG.10 Fergusonite-beta-(Nd) (Nd,Ce)NbO4 I2 2
 
04.DG.10 Fergusonite-beta-(Y) YNbO4 I2 2
 
04.DG.10 Fergusonite-beta-(Ce) (Ce,La,Nd)NbO4 I2 2
 
04.DG.10 Yttrotantalite-(Y) (Y,U,Fe)(Ta,Nb)O4 I2/a 2/m
 

Other Fergusonite-beta-(Nd) Information

Help on References: References: NAME( AntBidBlaNic3) 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 Fergusonite-beta-(Nd) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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

Fergusonite-beta-(Nd)

(Nd,Ce)NbO4
Dana No: 08.01.02.03 Strunz No: 04.DG.10
Locality:

 

Notes:

 

 
   
 


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