Fergusonite-beta-(Y) Mineral Data

Fergusonite-beta-(Y) Mineral Data +

General Fergusonite-beta-(Y) Information

Chemical Formula:

YNbO4

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

Empirical Formula:

YNbO₄

IMA Status:

Approved IMA 1961

Locality:

Link to MinDat.org Location Data.

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Fergusonite-beta-(Y) Crystallography

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 - SphenoidalH-M Symbol (2) Space Group: I2

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.12(1), 2.955(0.95), 1.9(0.75),

Physical Properties of Fergusonite-beta-(Y)

Color:

Yellow.

Diaphaniety:

Translucent to Opaque

Hardness:

5.5-6.5 - Knife Blade-Pyrite

Luster:

Vitreous - Greasy

Optical Properties of Fergusonite-beta-(Y)

Gladstone-Dale:

CI calc= 0.096 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2016,KC= 0.223

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)

Electron Density:

r_electron=5.08 gm/cc
note: r_{Fergusonite-beta-(Y)}=5.58 gm/cc.

Fermion Index

Fermion Index = 0.00012
Boson Index = 0.99988

Photoelectric:

PE_{Fergusonite-beta-(Y)}= 105.20 barns/electron
U=PE_{Fergusonite-beta-(Y)} x r_electron= 534.91 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Fergusonite-beta-(Y) is Not Radioactive

Fergusonite-beta-(Y) Classification

Dana Class:

8.1.2.1 (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

Strunz Class:

IV/D.24-10 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-(Y) Information

References:

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 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

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

Fergusonite-beta-(Y)

YNbO4
Dana No: 8.1.2.1 Strunz No: IV/D.24-10
Locality:

Notes: