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Cliffordite

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Clifford Frondel
Formula:
(UO2)Te4+3O7
Colour:
Bright sulfur Yellow
Lustre:
Adamantine
Hardness:
4
Specific Gravity:
6.57
Crystal System:
Isometric
Name:
Named by Richard V. Gaines in 1969 in honor of Clifford Frondel (8 January 1907, Brooklyn, New York, New York, USA - 12 November 2002, Winchester, Massachusetts, USA), American mineralogist, Professor of Mineralogy, Harvard University, Cambridge, Massachusetts, USA. The mineral frondelite is also named in his honor.
This page provides mineralogical data about Cliffordite.


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Classification of ClifforditeHide

Approved
4.JK.75

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
34.3.1.1

34 : SELENITES, TELLURITES AND SULFITES
3 : A2(XO3)3·xH2O
28.3.18

28 : Selenites, Selenates, Tellurites, and Tellurates
3 : Tellurites

Physical Properties of ClifforditeHide

Adamantine
Transparency:
Translucent
Colour:
Bright sulfur Yellow
Hardness:
Density:
6.57 g/cm3 (Measured)    6.77 g/cm3 (Calculated)
Comment:
On synthetic material.

Optical Data of ClifforditeHide

Type:
Isotropic
RI values:
n = 2.25(2)
Max Birefringence:
δ = 0.000 - Isotropic minerals have no birefringence
Surface Relief:
Very High
Comments:
On synthetic material

Chemical Properties of ClifforditeHide

Formula:
(UO2)Te4+3O7
IMA Formula:
UTe4+3O9

Crystallography of ClifforditeHide

Crystal System:
Isometric
Class (H-M):
m3 (2/m 3) - Diploidal
Space Group:
Pa3
Cell Parameters:
a = 11.42(5) Å
Unit Cell V:
1,489.36 ų (Calculated from Unit Cell)
Z:
8
Morphology:
Octahedra crystals, crusts.

Type Occurrence of ClifforditeHide

Place of Conservation of Type Material:
Harvard University, Boston Massachusetts 119079

Synonyms of ClifforditeHide

Other Language Names for ClifforditeHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Mackayite1 photo of Cliffordite associated with Mackayite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

4.JK.05WinstanleyiteTiTe4+3O8Iso. m3 (2/m 3) : Ia3
4.JK.05Walfordite(Fe3+,Te6+)Te4+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)6Cl
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.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

28.3.1BalyakiniteCu(TeO3)Orth.
28.3.2RajiteCu(Te4+2O5)Mon. 2/m : P21/b
28.3.3GraemiteCu[TeO3] · H2OOrth. mmm (2/m 2/m 2/m) : Pmma
28.3.4TeineiteCu2+(Te4+O3) · 2H2OOrth. mmm (2/m 2/m 2/m)
28.3.5CesbroniteCu2+Te6+O4(OH)4Orth.
28.3.6MroseiteCaTe4+(CO3)O2Orth. mmm (2/m 2/m 2/m) : Pbca
28.3.7QuetzalcoatliteZn6Cu3(TeO6)2(OH)6 · AgxPbyClx+2yTrig. 3m (3 2/m) : P3m1
28.3.8ZemanniteMg0.5ZnFe3+(Te4+O3)3 · 4.5H2OHex. 6/m : P63/m
28.3.9KinichiliteMg0.5Mn2+Fe3+(Te4+O3)3 · 4.5H2OHex. 6/m : P63/m
28.3.10Denningite(Mn2+,Ca,Zn)Te4+2O5Tet.
28.3.11SpiroffiteMn2+2Te4+3O8Mon. 2/m : B2/b
28.3.12WinstanleyiteTiTe4+3O8Iso. m3 (2/m 3) : Ia3
28.3.13FairbankitePb(TeO3)Tric.
28.3.14PlumbotelluritePb(TeO3)Orth.
28.3.15Choloalite(Cu,Sb)3(Pb,Ca)3(TeO3)6Cl
28.3.16SmirniteBi2Te4+O5Orth. mm2
28.3.17ChekhovichiteBi2Te4+4O11Mon. 2/m
28.3.19Schmitterite(UO2)(TeO3)Orth.
28.3.20MoctezumitePb(UO2)(TeO3)2Mon.
28.3.21EmmonsiteFe3+2(TeO3)3 · 2H2OTric. 1 : P1
28.3.22BlakeiteFe3+2[TeO3]3 (?)
28.3.23MackayiteFe3+(Te4+2O5)(OH)Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
28.3.24PoughiteFe3+2(TeO3)2(SO4)(H2O)2 · H2OOrth.
28.3.25SonoraiteFe3+(TeO3)(OH) · H2OMon.
28.3.26RodalquilariteFe2(TeO2OH)3(TeO3)ClTric. 1 : P1
28.3.27EztlitePb2Fe3+6(Te4+O3)3(Te6+O6)(OH)10 · 8H2OMon.
28.3.28KeystoneiteMg0.5Ni2+Fe3+(Te4+O3)3 · 4.5H2OHex.

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 ClifforditeHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Gaines, R.V. (1969) Cliffordite–a new tellurite mineral from Moctezuma, Sonora, Mexico. American Mineralogist: 54: 697-701.
Fleischer, M. (1972) New mineral names. American Mineralogist: 57: 594-598.
Galy, J., Meunier, G. (1971) A propos de la cliffordite UTe3O8. Le système UO3–TeO2 à 700°C. Structure cristalline de UTe3O9. Acta Crystallographica: B27(3): 608-616. (in French)
Brandstätter, F. (1981) Non-stoichiometric, hydrothermally synthesized cliffordite. Tschermaks Mineralogische und Petrographische Mitteilungen: 29: 1-8.
Burns, P.C. (2005) U 6+ minerals and inorganic compounds: insights into an expanded structural hierarchy of crystal structures. Canadian Mineralogist: 43: 1839-1894.

Internet Links for ClifforditeHide

Localities for ClifforditeHide

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.
Mexico
 
  • Sonora
    • Mun. de Moctezuma
      • Moctezuma
Lapis 2001(1), 11-40
Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols
Amer.Min.(1969) 54, 697-701
Lapis 2001(1), 11-40
Mineral and/or Locality  
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