Mineralogy Database

Fergusonite-(Y) Mineral Data

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General Fergusonite-(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 IMA Status: IMA Status: Valid Species (Pre-IMA) 1827
Help on Locality: Locality: Qeqertaussaq, Julienhaab district, Greenland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Robert Ferguson (1767-1840), Scottish advocate, politician, and mineralogist.
Help on Name Pronunciation: Name Pronunciation: Fergusonite-(Y) + Pronunciation Say FERGUSONITE-(Y)
Help on Synonym: Synonym: ICSD 40346
  Kochelite - mixture of fergusonite-(Y) and zircon
  PDF 9-443

Fergusonite-(Y) Image

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Comments: Heavy mass of fergusonite-(Y) with one face polished flat to show the solid interior. Radioactive.
Location: Ambatofotsy, Betafo - Antsirab├ę region, Antananarivo Province, Madagascar. Scale: 6x2.5x1.5 cm.
© John Betts - Fine Minerals

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  Fergusonite-(Y)   Plumbopyrochlore

Comments: Brown resinous fergusonite-(Y) (as per communication with Pavel M. Kartashov) with yellowish plumbopyrochlore.
Location: Ploskaya Mountain, Keivy Region, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Fergusonite-(Y) Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.46511
Help on Cell Dimensions: Cell Dimensions: a = 7.74, c = 11.34, Z = 8; V = 679.35 Den(Calc)= 4.81
Help on Crystal System: Crystal System: Tetragonal - Dipyramidal H-M Symbol (4/m) Space Group: I 41/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.12(1), 2.96(0.9), 1.901(0.5),
Help on Forms: Forms:

Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 1 1 1) ( 2 3 1) ( 2 3 0) ( 0 0 1)

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Physical Properties of Fergusonite-(Y)

Help on Cleavage: Cleavage: {???} Indistinct
Help on Color: Color: Black, Black, Brown, Gray, Yellow.
Help on Density: Density: 4.3 - 5.8, Average = 5.05
Help on Diaphaneity: Diaphaneity: Subtranslucent to opaque
Help on Fracture: Fracture: Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.
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 - Knife Blade-Orthoclase
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Sub Metallic
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: brown

Optical Properties of Fergusonite-(Y)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.005 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.044 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2328,KPDmeas= 0.2218,KC= 0.223
Ncalc = 1.96 - 2.29
Help on Optical Data: Optical Data: Isotropic, n=2.05-2.19.

Calculated Properties of Fergusonite-(Y)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.60 gm/cc
note: Specific Gravity of Fergusonite-(Y) =5.05 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.00012497
Boson Index = 0.99987503
Help on Photoelectric: Photoelectric: PEFergusonite-(Y) = 105.20 barns/electron
U=PEFergusonite-(Y) x rElectron Density= 484.10 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Fergusonite-(Y) is Not Radioactive

Fergusonite-(Y) Classification

Help on  Dana Class: Dana Class: (08)Multiple Oxides with Nb, Ta, and Ti
  (08.01)where A BO4
  (08.01.01)Fergusonite Group (Tetragonal) Fergusonite-(Y) YNbO4 I 41/a 4/m Formanite-(Y) YTaO4 I 41/a 4/m Fergusonite-(Ce)* (Ce,La,Y)NbO4 I 41/a 4/m Fergusonite-(Nd)* (Nd,Ce)(Nb,Ti)O4 I 41/a 4/m
Help on  Strunz Class: Strunz Class: 07.GA.05 07 - SULFATES (SELENATES, TELLURATES)
  07.G - Molybdates, Wolframates and Niobates
  07.GA -Without additional anions or H2O
07.GA.05 Fergusonite-(Ce)* (Ce,La,Y)NbO4 I 41/a 4/m
07.GA.05 Fergusonite-(Nd)* (Nd,Ce)(Nb,Ti)O4 I 41/a 4/m
07.GA.05 Fergusonite-(Y) YNbO4 I 41/a 4/m
07.GA.05 Stolzite PbWO4 I 41/a 4/m
07.GA.05 Scheelite CaWO4 I 41/a 4/m
07.GA.05 Powellite CaMoO4 I 41/a 4/m
07.GA.05 Wulfenite PbMoO4 I 41/a 4/m

Other Fergusonite-(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-(Y) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Dana No: Strunz No: 07.GA.05





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