Wakefieldite-(La)
A valid IMA mineral species
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About Wakefieldite-(La)
Formula:
La(VO4)
Colour:
light pinkish to brown
Lustre:
Adamantine
Hardness:
4
Specific Gravity:
4.703 (Calculated)
Crystal System:
Tetragonal
Member of:
Name:
Lanthanum-dominant analogue of wakefieldite-(Ce), wakefieldite-(Y) and wakefieldite-(Nd). The original wakefieldite (renamed to wakefieldite-(Y) in 1987) was named for the lake (originally called Lake Wakefield, now called Lac Saint-Pierre) near its type locality, the Evans-Lou mine.
Unique Identifiers
Mindat ID:
35901
Long-form identifier:
mindat:1:1:35901:8
Similar Names
| Wakefieldite | ||
| Wakefieldite-(Ce) | A valid IMA mineral species | Ce(VO4) |
| Wakefieldite-(Nd) | A valid IMA mineral species | Nd(VO4) |
| Wakefieldite-(Y) | A valid IMA mineral species | Y(VO4) |
IMA Classification of Wakefieldite-(La)
Approved
IMA Formula:
LaVO4
Approval year:
2007
Classification of Wakefieldite-(La)
8.AD.35
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
D : With only large cations
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
D : With only large cations
38.4.9.6
38 : ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
4 : AXO4
38 : ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
4 : AXO4
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Wf-La | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Wakefieldite-(La)
Adamantine
Transparency:
Transparent, Translucent
Colour:
Light pinkish to brown
Streak:
White
Hardness:
4 on Mohs scale
Hardness Data:
Measured
Tenacity:
Brittle
Cleavage:
None Observed
possible {100} inferred from X-ray study.
possible {100} inferred from X-ray study.
Fracture:
Irregular/Uneven
Density:
4.703 g/cm3 (Calculated)
Optical Data of Wakefieldite-(La)
Type:
Uniaxial (+)
Pleochroism:
Weak
Comments:
E = pale pink, O = pale pinkish yellow.
Comments:
ω and ε > 1.90
Chemistry of Wakefieldite-(La)
Mindat Formula:
La(VO4)
Element Weights:
Elements listed:
Crystallography of Wakefieldite-(La)
Crystal System:
Tetragonal
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
I41/amd
Setting:
I41/amd
Cell Parameters:
a = 7.406(4) Å, c = 6.504(8) Å
Ratio:
a:c = 1 : 0.878
Unit Cell V:
356.8 ų
Z:
4
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0007272 | Wakefieldite-(La) | Witzke T, Kolitsch U, Warnsloh J M, Goske J (2008) Wakefieldite-(La), LaVO4, a new mineral species from the Glucksstern Mine, Friedrichroda, Thuringia, Germany European Journal of Mineralogy 20 1135-1139 | 2008 | Glucksstern Mine, Friedrichroda, Thuringia, Germany | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.707 Å | (100) |
| 1.853 Å | (19) |
| 2.759 Å | (10) |
| 2.623 Å | (7) |
| 2.939 Å | (5) |
| 2.309 Å | (5) |
| 2.088 Å | (5) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-? alteration and/or metamorphism | |
| 31 : Thermally altered carbonate, phosphate, and iron formations | |
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 34 : Complex granite pegmatites |
Type Occurrence of Wakefieldite-(La)
General Appearance of Type Material:
prismatic crystals up to 0.5mm in length
Place of Conservation of Type Material:
Mineralogical Collection, Bergakademie, Freiberg, Germany, 81876.
Geological Setting of Type Material:
low temperature mineral in a hydrothermal barite vein
Associated Minerals at Type Locality:
Synonyms of Wakefieldite-(La)
Wakefieldite (in part)
Other Language Names for Wakefieldite-(La)
Relationship of Wakefieldite-(La) to other Species
Member of:
Other Members of Xenotime Group:
| Anningite-(Ce) | (Ca0.5Ce4+0.5)(VO4) | Tet. 4/mmm (4/m 2/m 2/m) : I41/amd |
| Chernovite-(Y) | Y(AsO4) | Tet. 4/mmm (4/m 2/m 2/m) : I41/amd |
| Pretulite | Sc(PO4) | Tet. 4/mmm (4/m 2/m 2/m) : I41/amd |
| Wakefieldite-(Ce) | Ce(VO4) | Tet. 4/mmm (4/m 2/m 2/m) : I41/amd |
| Wakefieldite-(Nd) | Nd(VO4) | Tet. 4/mmm (4/m 2/m 2/m) : I41/amd |
| Wakefieldite-(Y) | Y(VO4) | Tet. 4/mmm (4/m 2/m 2/m) : I41/amd |
| Xenotime-(Gd) | Gd(PO4) | Tet. 4/mmm (4/m 2/m 2/m) : I41/amd |
| Xenotime-(Y) | Y(PO4) | Tet. 4/mmm (4/m 2/m 2/m) : I41/amd |
| Xenotime-(Yb) | Yb(PO4) | Tet. 4/mmm (4/m 2/m 2/m) : I41/amd |
Common Associates
Associations Based on Photo Data:
| 1 photo of Wakefieldite-(La) associated with Stevensite | (Ca,Na)xMg3-x(Si4O10)(OH)2 |
| 1 photo of Wakefieldite-(La) associated with Hausmannite | Mn2+Mn3+2O4 |
| 1 photo of Wakefieldite-(La) associated with 'Calciobetafite (of Mazzi & Munno)' | (Ca,Na)2(Nb,Ti)2(O,OH)7 |
| 1 photo of Wakefieldite-(La) associated with Monazite Group | REE(PO4) |
| 1 photo of Wakefieldite-(La) associated with Cerianite-(Ce) | (Ce4+,Th)O2 |
Related Minerals - Strunz-mindat Grouping
| 8.AD. | 'Unnamed (Monoclinic polymorph of ximengite)' | Bi(PO4) |
| 8.AD. | Keplerite | Ca9(Ca0.5◻0.5)Mg(PO4)7 |
| 8.AD. | Mazorite | Ba3(PO4)2 |
| 8.AD. | Deynekoite | Ca9◻Fe3+(PO4)7 |
| 8.AD. | Monazite-(Gd) | Gd(PO4) |
| 8.AD.05 | Nahpoite | Na2(PO3OH) |
| 8.AD.10 | Weilite | Ca(HAsO4) |
| 8.AD.10 | Švenekite | Ca(H2AsO4)2 |
| 8.AD.10 | Monetite | Ca(PO3OH) |
| 8.AD.15 | Archerite | (K,NH4)(H2PO4) |
| 8.AD.15 | Biphosphammite | NH4(H2PO4) |
| 8.AD.20 | Phosphammite | (NH4)2(PO3OH) |
| 8.AD.25 | Buchwaldite | NaCa(PO4) |
| 8.AD.30 | Schultenite | Pb(HAsO4) |
| 8.AD.35 | Dreyerite | Bi(VO4) |
| 8.AD.35 | Anningite-(Ce) | (Ca0.5Ce4+0.5)(VO4) |
| 8.AD.35 | Pretulite | Sc(PO4) |
| 8.AD.35 | Wakefieldite-(Ce) | Ce(VO4) |
| 8.AD.35 | Wakefieldite-(Y) | Y(VO4) |
| 8.AD.35 | Xenotime-(Yb) | Yb(PO4) |
| 8.AD.35 | 'Chernovite-(Ce)' | (Ce,Y)(AsO4) |
| 8.AD.35 | Xenotime-(Gd) | Gd(PO4) |
| 8.AD.35 | Chernovite-(Y) | Y(AsO4) |
| 8.AD.35 | Xenotime-(Y) | Y(PO4) |
| 8.AD.35 | Wakefieldite-(Nd) | Nd(VO4) |
| 8.AD.40 | Pucherite | Bi(VO4) |
| 8.AD.45 | Ximengite | Bi(PO4) |
| 8.AD.50 | 'UM2005-35-VO:CaFePSiTh' | (Th,Ca)(VO4,SiO4,PO4) |
| 8.AD.50 | Rooseveltite | Bi(AsO4) |
| 8.AD.50 | Gasparite-(Ce) | Ce(AsO4) |
| 8.AD.50 | Monazite-(Sm) | Sm(PO4) |
| 8.AD.50 | Monazite-(Ce) | Ce(PO4) |
| 8.AD.50 | Monazite-(La) | La(PO4) |
| 8.AD.50 | Monazite-(Nd) | Nd(PO4) |
| 8.AD.50 | Gasparite-(La) | La(AsO4) |
| 8.AD.50 | Cheralite | CaTh(PO4)2 |
| 8.AD.55 | Tetrarooseveltite | Bi(AsO4) |
| 8.AD.60 | Chursinite | [Hg2]2+Hg2+2[AsO4]2 |
| 8.AD.65 | Clinobisvanite | Bi(VO4) |
| 8.AD.70 | Gurimite | Ba3(VO4)2 |
| 8.AD.75 | Picaite | NaCa[AsO3OH][AsO2(OH)2] |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Wakefieldite-(La)
mindat.org URL:
https://www.mindat.org/min-35901.html
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References for Wakefieldite-(La)
Localities for Wakefieldite-(La)
Showing 3 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Germany | |
| Blass et al. (2010) |
| Witzke et al. (2008) |
Italy | |
| analysed by Dr. Anthony Kampf +1 other reference |
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Caspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany