Wakefieldite-(Y) Mineral Data

Wakefieldite-(Y) Mineral Data +

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)

IMA Status:

Approved IMA 1969

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 78074

IMA1969-012

PDF 17-341

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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

Optical Data:

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

Calculated Properties of Wakefieldite-(Y)

Electron Density:

r_electron=3.93 gm/cc
note: r_{Wakefieldite-(Y)}=4.26 gm/cc.

Fermion Index

Fermion Index = 0.00077
Boson Index = 0.99923

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Wakefieldite-(Y) is Not Radioactive

Wakefieldite-(Y) Classification

Dana Class:

38.4.11.3 (38)Anhydrous Phosphates, etc

(38.4)A+ XO4

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

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

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

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

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

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

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

Strunz Class:

VII/A.14-30 VII - Phosphates, Arsenates and Vanadates

VII/A - Waterfree phosphates [PO4]3- without unfamiliar anions, cations of very big size: Ca, Na and andre

VII/A.14 - Xenotime-(Y) - Wakefieldite-(Ce) series

VII/A.14-05 Pretulite! ScPO4 I 4₁/amd 4/m 2/m 2/m

VII/A.14-08 Xenotime-(Yb)! YbPO4 I 4₁/amd 4/m 2/m 2/m

VII/A.14-10 Xenotime-(Y) YPO4 I 4₁/amd 4/m 2/m 2/m

VII/A.14-20 Chernovite-(Y) YAsO4 I 4₁/amd 4/m 2/m 2/m

VII/A.14-25 Chernovite-(Ce)* (Ce,Y)(AsO4) I 4₁/amd 4/m 2/m 2/m

VII/A.14-30 Wakefieldite-(Y) YVO4 I 4₁/amd 4/m 2/m 2/m

VII/A.14-40 Wakefieldite-(Ce) (Ce,Pb,Pb)VO4 I 4₁/amd 4/m 2/m 2/m

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

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Wakefieldite-(Y)

YVO4
Dana No: 38.4.11.3 Strunz No: VII/A.14-30
Locality:

Notes: