Fergusonite-beta-(Ce) Mineral Data + Say FERGUSONITE-BETA-(CE)


[Localities] [Carat Weight] [Special Collections] [Diamond Lots] [Ordering Info]
See Also: [Excalibur Minerals] [Mineral News] [Hudson Institute] [Minerals on CDROM]
Special Collections of Rough Diamonds for Researchers and Collectors
Unparalled diversity of specimens from different locations

General Fergusonite-beta-(Ce) Information
Help on Chemical Formula: Chemical Formula: (Ce,La,Nd)NbO4
Help on Composition: Composition: Molecular Weight = 288.78 gm
   Lanthanum         9.62 %  La   11.28 % La2O3
   Cerium           19.41 %  Ce   22.73 % Ce2O3
   Praeseodymium     4.88 %  Pr    5.71 % Pr2O3
   La,Ce,Pr,Nd,Sm,   4.99 %  RE    5.82 % REE2O3
   Niobium          28.95 %  Nb   41.42 % Nb2O5
   Neodymium         9.99 %  Nd   11.65 % Nd2O3
   Oxygen           22.16 %  O
                   ______        ______ 
                   100.00 %       98.61 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: La0.2Ce0.4Pr0.1Nd0.2REE0.1Nb0.9O4
Help on Environment: Environment: In magnesian skarn around carbonatite-derived dolomitic marble.
Help on IMA Status: IMA Status: Approved IMA 1973
Help on Locality: Locality: Bayan Obo Fe-Nb-REE deposit, 130 km north of Baotaou, Inner Mongolia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the dimorphous relationship to fergusonite-(Ce).
 

Search for Fergusonite-beta-(Ce) Images

Click Here To Search Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.
  

Fergusonite-beta-(Ce) Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.4576:1:0.4832
Help on Cell Dimensions: Cell Dimensions: a = 5.19, b = 11.34, c = 5.48, Z = 4; beta = 95.57° V = 321.00 Den(Calc)= 5.98
Help on Crystal System: Crystal System: Monoclinic - SphenoidalH-M Symbol (2) Space Group: I2
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.965(1), 3.058(1), 3.24(1),
Click Here for Large Fergusonite-beta-(Ce) Structure Window Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
 Help on Above


Santoro A , Marezio M , Roth R S , Minor D , Journal of Solid State Chemistry , 35 (1980) p.167-175, Neutron powder diffraction study of the, structures of CeTaO4, CeNbO4, and NdTaO4, Locality: synthetic

 

Physical Properties of Fergusonite-beta-(Ce)

Help on Color: Color: Red, Reddish brown.
Help on Density: Density: 5.34
Help on Diaphaniety: Diaphaniety: Subtranslucent to Opaque
Help on Fracture: Fracture: Brittle - Subconchoidal - Brittle frature with subconchoidal fragments
Help on Habit: Habit: Anhedral Grains - Granular minerals without the expression of crystal shapes
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 rose
 

Optical Properties of Fergusonite-beta-(Ce)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.126 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.006 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1931,KPDmeas= 0.2163,KC= 0.192
Help on Optical Data: Optical Data: Isotropic, n=2.155.
 

Calculated Properties of Fergusonite-beta-(Ce)

Help on Electron Density: Electron Density:

relectron=5.28 gm/cc
note: rFergusonite-beta-(Ce) =5.98 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.02992
Boson Index = 0.97008
Help on Photoelectric: Photoelectric:

PEFergusonite-beta-(Ce) = 313.39 barns/electron
U=PEFergusonite-beta-(Ce) x relectron=1,654.84 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 46,060.12 (Gamma Ray American Petroleum Institute Units)

Fergusonite-beta-(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) 660.37 ±165.09 grams of pure Fergusonite-beta-(Ce) .

Estimated Radioactivity from Fergusonite-beta-(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 / 6.84 cm 1,095,394 2.96E-05 46,060.12 15.14
100 gm / 3.17 cm 109,539 2.96E-06 4,606.01 1.51
10 gm / 1.47 cm 10,954 2.96E-07 460.60 0.15
1 gm / 6.84 mm 1,095 2.96E-08 46.06 0.02
0.1 gm / 3.17 mm 110 2.96E-09 4.61 0.00
0.01 gm / 1.47 mm 11 2.96E-10 0.46 0.00
0.001 gm / 0.68 mm 1 2.96E-11 0.05 0.00

Weight of pure Fergusonite-beta-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.98 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 ( 2.44 % Th) From Sum REE Elements (48.88 % REE)
 

Fergusonite-beta-(Ce) Classification
Help on Dana Class: Dana Class: 8.1.2.2 (8)Multiple Oxides with Nb, Ta, and Ti
  (8.1)where A BO4
  (8.1.2)Dana Group
 
8.1.2.1 Fergusonite-beta-(Y) YNbO4 I2 2
 
8.1.2.2 Fergusonite-beta-(Ce) (Ce,La,Nd)NbO4 I2 2
 
8.1.2.3 Fergusonite-beta-(Nd) (Nd,Ce)NbO4 I2 2
Help on Strunz Class: Strunz Class: IV/D.24-20 IV - Oxides
  IV/D - Oxides with metal : oxygen = 1:2 (MO2 and related compounds)
  IV/D.24 - Fergusonite-(Y) - Formanite-(Y) series
 
IV/D.24-10 Fergusonite-beta-(Y) YNbO4 I2 2
 
IV/D.24-20 Fergusonite-beta-(Ce) (Ce,La,Nd)NbO4 I2 2
 
IV/D.24-30 Fergusonite-beta-(Nd) (Nd,Ce)NbO4 I2 2
 
IV/D.24-40 Fergusonite-(Y) YNbO4 I 41/a 4/m
 
IV/D.24-50 Fergusonite-(Ce)* (Ce,La,Y)NbO4 I 41/a 4/m
 
IV/D.24-60 Fergusonite-(Nd)* (Nd,Ce)(Nb,Ti)O4 I 41/a 4/m
 
IV/D.24-70 Formanite-(Y) YTaO4 I 41/a 4/m
 

Other Fergusonite-beta-(Ce) Information
Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Fergusonite-beta-(Ce) :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

Search for Fergusonite-beta-(Ce) using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Fergusonite-beta-(Ce) :
AA Mineral Specimens
B and L Minerals
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Fergusonite-beta-(Ce) Mineral Data :

Ask about Fergusonite-beta-(Ce) 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 Español

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

Fergusonite-beta-(Ce)

(Ce,La,Nd)NbO4
Dana No: 8.1.2.2 Strunz No: IV/D.24-20
Locality:

 

Notes:

 
 
   
 
Go To Webmineral Home Crystallography X-Ray D-Spacing Table Chemical Composition
Dana Classification Strunz Classification Table of Mineral Properties Alphabetical Listing of Minerals
Search Webmineral Photo Gallery of Mineral Images Help Files Links