Mineralogy Database

Fergusonite-beta-(Y) Mineral Data

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General Fergusonite-beta-(Y) Information

Help on Chemical  Formula: Chemical Formula: YNbO4
Help on Composition: Composition: Molecular Weight = 245.81 gm
   Yttrium  36.17 %  Y    45.93 % Y2O3
   Niobium  37.80 %  Nb   54.07 % Nb2O5
   Oxygen   26.04 %  O
           ______        ______ 
           100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: YNbO4
Help on Environment: Environment: Granitic rocks.
Help on IMA Status: IMA Status: Approved IMA 1961
Help on Locality: Locality: Central-eastern Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the crystal symmetry and composition as the Y-dominant member of the fergusonite group.
Help on Name Pronunciation: Name Pronunciation: Fergusonite-beta-(Y) + Pronunciation Say FERGUSONITE-BETA-(Y)

Fergusonite-beta-(Y) Image

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Comments: Black crystal of fergusonite-β-(Y) in matrix.
Location: Fukushima City, Fukushima Prefecture, Japan. Scale: Crystal Size 6 mm.
© Nagashima mineral collection

Fergusonite-beta-(Y) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4837:1:0.4633
Help on Cell Dimensions: Cell Dimensions: a = 5.292, b = 10.94, c = 5.069, Z = 4; beta = 94.6° V = 292.52 Den(Calc)= 5.58
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): 3.12(1), 2.955(0.95), 1.9(0.75),

Physical Properties of Fergusonite-beta-(Y)

Help on Color: Color: Yellow.
Help on Diaphaneity: Diaphaneity: Translucent to Opaque
Help on Hardness: Hardness: 5.5-6.5 - Knife Blade-Pyrite
Help on Luster: Luster: Vitreous - Greasy

Optical Properties of Fergusonite-beta-(Y)

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.096 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2016,KC= 0.223
Ncalc = 2.24
Help on Optical Data: Optical Data: Biaxial (+/-), a=2.06-2.19, b=2.06-2.19, g=2.06-2.19, bire=0.0000, 2V(Calc)=0, 2V(Meas)=0.

Calculated Properties of Fergusonite-beta-(Y)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.08 gm/cc
note: Specific Gravity of Fergusonite-beta-(Y) =5.58 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.00012497
Boson Index = 0.99987503
Help on Photoelectric: Photoelectric: PEFergusonite-beta-(Y) = 105.20 barns/electron
U=PEFergusonite-beta-(Y) x rElectron Density= 534.91 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Fergusonite-beta-(Y) is Not Radioactive

Fergusonite-beta-(Y) Classification

Help on  Dana Class: Dana Class: (08)Multiple Oxides with Nb, Ta, and Ti
  (08.01)where A BO4
  (08.01.02)Fergusonite-beta Grup (Monoclinic) Fergusonite-beta-(Y) YNbO4 I2 2 Fergusonite-beta-(Ce) (Ce,La,Nd)NbO4 I2 2 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-(Y) Information

Help on References: References: NAME( Dana8) 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-(Y) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info

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Dana No: Strunz No: 04.DG.10





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