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Walfordite

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About WalforditeHide

Formula:
(Fe3+,Te6+)Te4+3O8
Colour:
Orange
Lustre:
Adamantine
Specific Gravity:
5.84 (Calculated)
Crystal System:
Isometric
Name:
Named by Malcolm E. Back, Joel D. Grice, Robert A. Gault, A. J. Criddle, and Joseph A. Mandarino in 1999 in honor of Phillip Walford [b. 1945], of Toronto, Ontario, Canada, Vice-President and Chief Geologist of LAC Minerals, Ltd., at the time that mining company held the mining rights to the discovery locality. He collected the first specimens.
This page provides mineralogical data about Walfordite.


Classification of WalforditeHide

Approved
First Published:
1999
4.JK.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
K : Tellurites without additional anions, without H2O

Pronounciation of WalforditeHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of WalforditeHide

Adamantine
Transparency:
Opaque
Colour:
Orange
Streak:
Orange-yellow
Tenacity:
Brittle
Cleavage:
None Observed
Parting:
None observed
Density:
5.84 g/cm3 (Calculated)

Optical Data of WalforditeHide

Type:
Isotropic
Bireflectance:
None
Pleochroism:
Non-pleochroic

Chemical Properties of WalforditeHide

Formula:
(Fe3+,Te6+)Te4+3O8
IMA Formula:
(Fe3+,Te6+,Ti4+,Mg)Te4+3O8

Crystallography of WalforditeHide

Crystal System:
Isometric
Class (H-M):
m3 (2/m 3) - Diploidal
Space Group:
Ia3
Setting:
Ia3
Cell Parameters:
a = 11.011 Å
Unit Cell V:
1,335.00 ų (Calculated from Unit Cell)
Z:
8
Morphology:
Most are simple cubes {100}. Some show octahedral modifications {111}.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.175 Å(100)
1.658 Å(45)
1.944 Å(44)
2.749 Å(37)
4.486 Å(29)
2.943 Å(23)
2.592 Å(22)

Type Occurrence of WalforditeHide

Place of Conservation of Type Material:
Royal Ontario Museum, Toronto, Canada, M47817, M47818.
Associated Minerals at Type Locality:

Synonyms of WalforditeHide

Other Language Names for WalforditeHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
2 photos of Walfordite associated with AluniteKAl3(SO4)2(OH)6

Related Minerals - Nickel-Strunz GroupingHide

4.JK.05WinstanleyiteTiTe4+3O8Iso. m3 (2/m 3) : Ia3
4.JK.10SpiroffiteMn2+2Te4+3O8Mon. 2/m : B2/b
4.JK.10ZincospiroffiteZn2Te4+3O8Mon. 2/m
4.JK.15BalyakiniteCu(TeO3)Orth.
4.JK.20RajiteCu(Te4+2O5)Mon. 2/m : P21/b
4.JK.25CarlfriesiteCaTe4+2Te6+O8Mon. 2/m : B2/b
4.JK.30Denningite(Mn2+,Ca,Zn)Te4+2O5Tet.
4.JK.35ChekhovichiteBi2Te4+4O11Mon. 2/m
4.JK.40SmirniteBi2Te4+O5Orth. mm2
4.JK.45Choloalite(Cu,Sb)3(Pb,Ca)3(TeO3)6ClIso. 4 3 2 : P41 3 2
4.JK.50FairbankitePb(TeO3)Tric.
4.JK.55PlumbotelluritePb(TeO3)Orth.
4.JK.60Magnolite(Hg+2)(Te4+O3)Orth. mm2
4.JK.65MoctezumitePb(UO2)(TeO3)2Mon.
4.JK.70Schmitterite(UO2)(TeO3)Orth.
4.JK.75Cliffordite(UO2)Te4+3O7Iso. m3 (2/m 3) : Pa3

Fluorescence of WalforditeHide

No fluorescence in short- or long-wavelength ultraviolet light.

Other InformationHide

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

References for WalforditeHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Galy, J., Meunier, G. (1971) Sur une déformation inédite du réseau de type fluorine. structure cristalline des phases MTe3O8 (M=Ti, Sn, Hf, Zr). Acta Crystallographica: B27: 602-608.
Back, M.E., Grice, J.D., Gault, R.A., Criddle, A.J., Mandarino, J.A. (1999) Walfordite, a new tellurite species from the Wendy open pit, El Indio-Tambo mining property, Chile. The Canadian Mineralogist: 37: 1261-1268.
Jambor, J.L., Pertsev, N.N., Roberts, A.C. (2000) New mineral names. American Mineralogist: 85: 1321-1325.

Internet Links for WalforditeHide

Localities for WalforditeHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Chile (TL)
 
  • Coquimbo
    • Elqui Province
      • El Indio deposit
        • Tambo Mine
Back, M.E., Grice, J.D., Gault, R.A., Criddle, A.J. & Mandarino, J.A. (1999): Walfordite, a new tellurite from the Wendy open pit, El Indio - Tambo mining property, Chile. Canadian Mineralogist 37, 1261-1268.
 
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