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Fergusonite-beta-(Y) Mineral Data
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General Fergusonite-beta-(Y) Information
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 Chemical Formula: |
YNbO4 |
| Composition: |
Molecular Weight = 245.81 gm |
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Yttrium 36.17 % Y 45.93 % Y2O3 |
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Niobium 37.80 % Nb 54.07 % Nb2O5 |
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Oxygen 26.04 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
YNbO4 |
| Environment: |
Granitic rocks. |
| IMA Status: |
Approved IMA 1961 |
| Locality: |
Central-eastern Russia. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the crystal symmetry and composition as the Y-dominant member of the fergusonite group. |
| Name Pronunciation: |
Fergusonite-beta-(Y) + Pronunciation  |
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Fergusonite-beta-(Y) Image |
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Images:
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Fergusonite-beta-(Y) Crystallography
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| Axial Ratios: |
a:b:c =0.4837:1:0.4633 |
| Cell Dimensions: |
a = 5.292, b = 10.94, c = 5.069, Z = 4; beta = 94.6° V = 292.52 Den(Calc)= 5.58 |
| Crystal System: |
Monoclinic - Sphenoidal H-M Symbol (2) Space Group: I2 |
| X Ray Diffraction: |
By Intensity(I/Io): 3.12(1), 2.955(0.95), 1.9(0.75), |
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Physical Properties of Fergusonite-beta-(Y)
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| Color: |
Yellow. |
| Diaphaneity: |
Translucent to Opaque |
| Hardness: |
5.5-6.5 - Knife Blade-Pyrite |
| Luster: |
Vitreous - Greasy |
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Optical Properties of Fergusonite-beta-(Y)
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| Gladstone-Dale: |
CI calc= 0.096 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2016,KC= 0.223
Ncalc = 2.24 |
| 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. |
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Calculated Properties of Fergusonite-beta-(Y)
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| Electron Density: |
Bulk Density (Electron Density)=5.08 gm/cc
note: Specific Gravity of Fergusonite-beta-(Y) =5.58 gm/cc.
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| Fermion Index: |
Fermion Index = 0.00012497
Boson Index = 0.99987503 |
| Photoelectric: |
PEFergusonite-beta-(Y) = 105.20 barns/electron
U=PEFergusonite-beta-(Y) x rElectron Density= 534.91 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Fergusonite-beta-(Y) is Not Radioactive |
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Fergusonite-beta-(Y) Classification
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| Dana Class: |
08.01.02.01 (08)Multiple Oxides with Nb, Ta, and Ti |
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(08.01)where A BO4 |
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(08.01.02)Fergusonite-beta Grup (Monoclinic) |
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08.01.02.01 Fergusonite-beta-(Y) YNbO4 I2 2 |
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08.01.02.02 Fergusonite-beta-(Ce) (Ce,La,Nd)NbO4 I2 2 |
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08.01.02.03 Fergusonite-beta-(Nd) (Nd,Ce)NbO4 I2 2 |
| Strunz Class: |
04.DG.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.D - Metal:Oxygen = 1:2 and similar |
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04.DG -With large (� medium-sized) cations; chains of edge-sharing octahedra |
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04.DG.10 Fergusonite-beta-(Nd) (Nd,Ce)NbO4 I2 2 |
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04.DG.10 Fergusonite-beta-(Y) YNbO4 I2 2 |
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04.DG.10 Fergusonite-beta-(Ce) (Ce,La,Nd)NbO4 I2 2 |
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04.DG.10 Yttrotantalite-(Y) (Y,U,Fe)(Ta,Nb)O4 I2/a 2/m |
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Other Fergusonite-beta-(Y) Information
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
| 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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Print or Cut-and-Paste your Fergusonite-beta-(Y) Specimen Label here :
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Fergusonite-beta-(Y)
YNbO4
Dana No: 08.01.02.01 Strunz No: 04.DG.10
Locality:
Notes:
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