Wakefieldite-(Y) Mineral Data

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General Wakefieldite-(Y) Information

Chemical Formula:

YVO4

Composition:

Molecular Weight = 203.84 gm

Yttrium 43.61 % Y 55.39 % Y₂O₃

Vanadium 24.99 % V 44.61 % V₂O₅

Oxygen 31.40 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Y(VO₄)

Environment:

Secondary mineral filling cavities in a pegmatite.

IMA Status:

Approved IMA 1969

Locality:

Evans Lou mine, St. Pierre near Wakefield, Portland Twp., Papineau, QUE, Canada. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Wakefieldite-(Y) + Pronunciation

Synonym:

ICSD 78074

IMA1969-012

PDF 17-341

Wakefieldite-(Y) Image

Images:

Wakefieldite-(Y)

Comments: Black rectangular prisms of wakefieldite-(Y) on matrix.
Location: Yellow Lake, British Columbia, Canada. Scale: See Image.
© Rruff Database

Wakefieldite-(Y) Crystallography

Axial Ratios:

a:c = 1:0.88529

Cell Dimensions:

a = 7.105, c = 6.29, Z = 4; V = 317.53 Den(Calc)= 4.26

Crystal System:

Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: I 4₁/amd

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

By Intensity(I/I_o): 3.56(1), 1.824(0.75), 2.66(0.5),

Crystal Structure:

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Chakoumakos B C , Abraham M M , Boatner L A , Journal of Solid State Chemistry , 109 (1994) p.197-202, Crystal structure refinements of zircon-type, MVO4 (M = Sc, Y, Ce, Pr, Nd, Tb, Ho, Er, Tm, Yb, Lu), Locality: synthetic

Physical Properties of Wakefieldite-(Y)

Color:

Yellow, Light brown, Light yellow brown.

Density:

4.21

Hardness:

5 - Apatite

Streak:

white

Optical Properties of Wakefieldite-(Y)

Gladstone-Dale:

CI meas= -0.034 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.022 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2512,KPDmeas= 0.2542,KC= 0.2458
Ncalc = 2.03 - 2.05

Optical Data:

Uniaxial (+), w=2, e=2.14, bire=0.1400.

Calculated Properties of Wakefieldite-(Y)

Electron Density:

Bulk Density (Electron Density)=3.93 gm/cc
note: Specific Gravity of Wakefieldite-(Y) =4.26 gm/cc.

Fermion Index:

Fermion Index = 0.0007754551
Boson Index = 0.9992245449

Photoelectric:

PE_{Wakefieldite-(Y)}= 60.46 barns/electron
U=PE_{Wakefieldite-(Y)} x rElectron Density= 237.54 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Wakefieldite-(Y) is Not Radioactive

Wakefieldite-(Y) Classification

Dana Class:

38.04.11.03 (38)Anhydrous Phosphates, etc

(38.04)A+ XO4

(38.04.11)Zenotime Group (Tetragonal: I41/amd)

38.04.11.01 Xenotime-(Y) YPO4 I 4₁/amd 4/m 2/m 2/m

38.04.11.02 Chernovite-(Y) YAsO4 I 4₁/amd 4/m 2/m 2/m

38.04.11.03 Wakefieldite-(Y) YVO4 I 4₁/amd 4/m 2/m 2/m

38.04.11.04 Wakefieldite-(Ce) (Ce,Pb,Pb)VO4 I 4₁/amd 4/m 2/m 2/m

38.04.11.05 Pretulite! ScPO4 I 4₁/amd 4/m 2/m 2/m

38.04.11.06 Xenotime-(Yb)! YbPO4 I 4₁/amd 4/m 2/m 2/m

38.04.11.07 Wakefieldite-(La)! LaVO4 I 4₁/amd 4mm

38.04.11.08 Wakefieldite-(Nd)! NdVO4 I 4₁/amd 4mm

Strunz Class:

08.AD.35 08 - PHOSPHATES, ARSENATES, VANADATES

08.A - Phosphates, etc. without additional anions, without H2O

08.AD -With only large cations

08.AD.35 Dreyerite BiVO4 I 4₁/amd 4/m 2/m 2/m

08.AD.35 Chernovite-(Y) YAsO4 I 4₁/amd 4/m 2/m 2/m

08.AD.35 Pretulite! ScPO4 I 4₁/amd 4/m 2/m 2/m

08.AD.35 Xenotime-(Y) YPO4 I 4₁/amd 4/m 2/m 2/m

08.AD.35 Wakefieldite-(Ce) (Ce,Pb,Pb)VO4 I 4₁/amd 4/m 2/m 2/m

08.AD.35 Wakefieldite-(Y) YVO4 I 4₁/amd 4/m 2/m 2/m

08.AD.35 Xenotime-(Yb)! YbPO4 I 4₁/amd 4/m 2/m 2/m

08.AD.35 Wakefieldite-(La)! LaVO4 I 4₁/amd 4mm

08.AD.35 Wakefieldite-(Nd)! NdVO4 I 4₁/amd 4mm

Other Wakefieldite-(Y) Information

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

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

Wakefieldite-(Y)

YVO4
Dana No: 38.04.11.03 Strunz No: 08.AD.35
Locality:

Notes: