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Wakefieldite-(La)

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Big Photo

Glücksstern Mine, Gottlob Hill, Friedrichroda, Thuringian Forest, Thuringia, Germany
© Thomas Witzke




Formula:
La(VO
 
4
)
System:TetragonalColour:light pinkish to brown
Hardness:4
Member of:Xenotime Group
Name:Lanthanum-dominant analogue of wakefieldite-(Ce) and wakefieldite-(Y)


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

Classification of Wakefieldite-(La)

IMA status:Approved 2007
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:38.4.9.6

38 : ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
4 : AXO4
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Type Occurrence of Wakefieldite-(La)

Type Locality:Glücksstern Mine, Gottlob Hill, Friedrichroda, Thuringian Forest, Thuringia, Germany
General Appearance of Type Material:prismatic crystals up to 0.5mm in length
Associated Minerals at type locality:
HausmanniteGottlobiteBaryte

Physical Properties of Wakefieldite-(La)

Lustre:Adamantine
Diaphaneity (Transparency):Transparent, Translucent
Colour:light pinkish to brown
Streak:white
Hardness (Mohs):4
Hardness Data:Measured
Density (calculated):4.703 g/cm3

Crystallography of Wakefieldite-(La)

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 = 7.406(4) Å, c = 6.504(8) Å
Ratio:a:c = 1 : 0.878
Unit Cell Volume:V 356.8 ų

Optical Data of Wakefieldite-(La)

Type:Uniaxial (+)

Chemical Properties of Wakefieldite-(La)

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

Relationship of Wakefieldite-(La) 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-(Nd)
Nd(VO
 
4
)
Wakefieldite-(Y)
Y(VO
 
4
)
Xenotime-(Y)
Y(PO
 
4
)
Xenotime-(Yb)
(Yb,Y,HREE)(PO
 
4
)
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.35Wakefieldite-(Y)
Y(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.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
)

Other Names for Wakefieldite-(La)

Synonyms:
IMA1989-035a
Other Languages:

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-(La)

Reference List:

- +
Witzke, T., U. Kolitsch, J.M. Warnsloh & J. Göske (2008): Wakefieldite-(La), a new mineral species from the Glücksstern Mine, Friedrichroda, Thuringia, Germany. European J. Mineralogy 20, 1135-1139.

Internet Links for Wakefieldite-(La)

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    • Localities for Wakefieldite-(La)

    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.
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    (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.
    Germany
     
    • Rhineland-Palatinate
      • Eifel
        • Mayen
          • Ettringen
            • Bellerberg volcano
    		Blass, G., (2010): Die neuen Mineralienfunde aus der Vulkaneifel, Mineralienwelt, Vol. 05, 2010
    • Thuringia
      • Thuringian Forest
        • Friedrichroda
          • Gottlob Hill
    		Witzke, T., U. Kolitsch, J.M. Warnsloh & J. Göske (2008): Wakefieldite-(La), a new mineral species from the Glücksstern Mine, Friedrichroda, Thuringia, Germany. European J. Mineralogy 20, 1135-1139.
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