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Wakefieldite-(Y)

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Big Photo

Evans-Lou Mine, Lac Saint-Pierre (Wakefield Lake), Val-des-Monts, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
© Knut Eldjarn




Formula:
Y(VO
 
4
)
System:TetragonalColour:Pale tan, yellow, canary ...
Hardness:5
Member of:Xenotime Group


Xenotime Group.
The Y analogue of wakefieldite-(Ce) and wakefieldite-(La).

Classification of Wakefieldite-(Y)

IMA status:Approved
Strunz 8th edition ID:7/A.14-30
Nickel-Strunz 10th (pending) edition ID:8.AD.35

8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
D : With only large cations
Dana 8th edition ID:38.4.11.3

38 : ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
4 : AXO4
Hey's CIM Ref.:21.3.7

21 : Vanadates (and vanadates with arsenate or phosphate)
3 : Vanadates of Al, rare earths, Pb, V or Bi
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Type Occurrence of Wakefieldite-(Y)

Type Locality:Evans-Lou Mine, Lac Saint-Pierre (Wakefield Lake), Val-des-Monts, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
General Appearance of Type Material:A pale tan pulverulent masses filling cavities in quartz.
Year of Discovery:1968
Geological Setting of type material:A zoned granite pegmatite
Associated Minerals at type locality:
QuartzMontmorilloniteKainosite-(Y)Hellandite

Physical Properties of Wakefieldite-(Y)

Colour:Pale tan, yellow, canary yellow, yellow-brown,
Hardness (Mohs):5
Comment:Approximately equal to that of apatite.
Density (calculated):4.25 g/cm3

Crystallography of Wakefieldite-(Y)

Crystal System:Tetragonal
Class (H-M):4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:I41/amd {I41/a 2/m 2/d}
Cell Parameters:a = 7.105(3) Å, c = 6.20(1) Å
Ratio:a:c = 1 : 0.873
Unit Cell Volume:V 312.98 ų (Calculated from Unit Cell)
Z:4
X-Ray Powder Diffraction:
d-spacingIntensity
4.74 (17)
3.56 (100)
2.66 (50)
2.51 (30)
2.21 (25)
1.824 (75)
1.774 (20)

Optical Data of Wakefieldite-(Y)

Type:Uniaxial (+)
RI values: nω = 2.000 nε = 2.140
Maximum Birefringence:δ = 0.140

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High

Chemical Properties of Wakefieldite-(Y)

Formula:
Y(VO
 
4
)
Essential elements:O, V, Y
All elements listed in formula:O, V, Y

Relationship of Wakefieldite-(Y) to other Species

Member of:Xenotime Group
Other Members of Group:

- +
Chernovite-(Y)
Y(AsO
 
4
)
Pretulite
Sc(PO
 
4
)
Wakefieldite-(Ce)
Ce(VO
 
4
)
Wakefieldite-(La)
La(VO
 
4
)
Wakefieldite-(Nd)
Nd(VO
 
4
)
Xenotime-(Y)
Y(PO
 
4
)
Xenotime-(Yb)
(Yb,Y,HREE)(PO
 
4
)
Common Associates:
QuartzMontmorilloniteHellandite-(Y)
Related Minerals - Nickel-Strunz Grouping):

- +
8.AD.05Nahpoite
Na
 
2
HPO
 
4
8.AD.10Monetite
Ca(HPO
 
4
)
8.AD.10Weilite
Ca(HAsO
 
4
)
8.AD.10Švenekite
Ca(H
 
2
AsO
 
4
)
 
2
8.AD.15Archerite
(K,NH
 
4
)(H
 
2
PO
 
4
)
8.AD.15Biphosphammite
(NH
 
4
,K)(H
 
2
PO
 
4
)
8.AD.20Phosphammite
(NH
 
4
)
 
2
(HPO
 
4
)
8.AD.25Buchwaldite
NaCa(PO
 
4
)
8.AD.30Schultenite
Pb(HAsO
 
4
)
8.AD.35Chernovite-(Y)
Y(AsO
 
4
)
8.AD.35Dreyerite
Bi(VO
 
4
)
8.AD.35Wakefieldite-(Ce)
Ce(VO
 
4
)
8.AD.35Xenotime-(Y)
Y(PO
 
4
)
8.AD.35Pretulite
Sc(PO
 
4
)
8.AD.35Xenotime-(Yb)
(Yb,Y,HREE)(PO
 
4
)
8.AD.35Wakefieldite-(La)
La(VO
 
4
)
8.AD.40Pucherite
Bi(VO
 
4
)
8.AD.45Ximengite
Bi(PO
 
4
)
8.AD.50Gasparite-(Ce)
(Ce,REE)(AsO
 
4
)
8.AD.50Monazite-(Ce)
(Ce,La,Nd,Th)(PO
 
4
)
8.AD.50Monazite-(La)
(La,Ce,Nd)(PO
 
4
)
8.AD.50Monazite-(Nd)
(Nd,La,Ce)(PO
 
4
)
8.AD.50Rooseveltite
Bi(AsO
 
4
)
8.AD.50Cheralite
(Ca,Ce)(Th,Ce)(PO
 
4
)
 
2
8.AD.50Monazite-(Sm)
(Sm,Gd,Ce,Th)(PO
 
4
)
8.AD.50UM2005-35-VO:CaFePSiTh
(Th,Ca)(VO
 
4
,SiO
 
4
,PO
 
4
)
8.AD.55Tetrarooseveltite
Bi(AsO
 
4
)
8.AD.60Chursinite
(Hg
+
2
)
 
0.5
Hg
2+
 
(AsO
 
4
)
8.AD.65Clinobisvanite
Bi(VO
 
4
)
Related Minerals - Hey's Index Grouping:

- +
21.3.1Steigerite
Al(VO
 
4
) · 3H
 
2
O
21.3.2Alvanite
(Zn,Ni)Al
 
4
(V
5+
 
O
 
3
)
 
2
(OH)
 
12
 · 2H
 
2
O
21.3.3Metaschoderite
Al
 
2
(PO
 
4
)(VO
 
4
) · 6H
 
2
O
21.3.4Schoderite
Al
 
2
(PO
 
4
)(VO
 
4
) · 8H
 
2
O
21.3.5Satpaevite
Al
 
12
V
4+
2
V
5+
6
O
 
37
 · 30H
 
2
O
21.3.6Vanalite
NaAl
 
8
V
 
10
O
 
38
 · 30H
 
2
O
21.3.7Wakefieldite-(Ce)
Ce(VO
 
4
)
21.3.8Chervetite
Pb
 
2
(V
 
2
O
 
7
)
21.3.9Mottramite
PbCu(VO
 
4
)(OH)
21.3.10Descloizite
Pb(Zn,Cu)(VO
 
4
)(OH)
21.3.11Clinobisvanite
Bi(VO
 
4
)
21.3.11Dreyerite
Bi(VO
 
4
)
21.3.11Pucherite
Bi(VO
 
4
)
21.3.12Schumacherite
Bi
 
3
(VO
 
4
)
 
2
O(OH)
21.3.13Namibite
Cu(BiO)
 
2
(VO
 
4
)(OH)
21.3.14Pottsite
HPbBi(VO
 
4
)
 
2
 · 2H
 
2
O
21.3.15Duhamelite
(Pb,Bi,Ca)Cu(VO
 
4
)(OH,O)

Other Names for Wakefieldite-(Y)

Synonyms:
IMA1969-012
Other Languages:
German:Wakefieldit-(Y)
Russian:Уэкфилдит-(Y)

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Wakefieldite-(Y)

Reference List:

- +
Annual Meeting of the Geological and Mineralogical Association of Canada, Abstract (1969): 20.

American Mineralogist (1970): 55: 1446.

Miles, N.M., D.D. Hogarth, and D.S. Russell (1971): Wakefieldite, yttrium
vanadate, a new mineral from Quebec. American Mineralogist. 56, 395-410

Internet Links for Wakefieldite-(Y)

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    • Localities for Wakefieldite-(Y)

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Canada
     
    • Québec
      • Outaouais
        • Les Collines-de-l'Outaouais RCM
          • Val-des-Monts
            • Lac Saint-Pierre (Wakefield Lake)
    		Miles, N. M., Hogarth, D.D. & Russell, D.S. (1971): Wakefieldite, yttrium vanadate, a new mineral from Quebec. American Mineralogist. 56, 395-410
    USA
     
    • Arizona
      • Maricopa Co.
    		Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 417.
    • Michigan
      • Baraga Co.
        • Huron River
    		Rocks & Minerals 82:298-308
    • New Mexico
      • Sierra Co.
    		Minerals of New Mexico 3rd ed.
    Northrop, Minerals of New Mexico, 3rd Rev. Ed., 1996
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