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Wyartite

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Formula:
CaU5+(UO2)2(CO3)O4(OH) · 7H2O
System:
Orthorhombic
Colour:
Black, violet-black ...
Lustre:
Vitreous, Sub-Metallic, Dull
Hardness:
3 - 4
Name:
Named after Jean Wyart (1902-1992), Professor of Mineralogy, Sorbonne, Paris, France. [Obituary: http://journals.iucr.org/a/issues/1992/04/00/es0175/es0175.pdf]
This page provides mineralogical data about Wyartite.

Classification of Wyartite

Approved
5.EA.15

5 : CARBONATES (NITRATES)
E : Uranyl Carbonates
A : UO2:CO3 > 1:1
16b.7.4.1

16b : HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
7 : Miscellaneous
11.11.8

11 : Carbonates
11 : Carbonates of Cr and U
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First Recorded Occurrence of Wyartite

Year of Discovery:
1959

Physical Properties of Wyartite

Vitreous, Sub-Metallic, Dull
Diaphaneity (Transparency):
Transparent, Translucent, Opaque
Colour:
Black, violet-black (fresh); yellowish brown, greenish brown (exposed)
Hardness (Mohs):
3 - 4

Crystallography of Wyartite

Crystal System:
Orthorhombic
Cell Parameters:
a = 11.25Å, b = 7.1Å, c = 20.8Å
Ratio:
a:b:c = 1.585 : 1 : 2.93
Unit Cell Volume:
V 1,661.40 ų (Calculated from Unit Cell)

Optical Data of Wyartite

Type:
Biaxial (-)
RI values:
nα = 1.890 nγ = 1.910
2V:
Measured: 48°
Max Birefringence:
δ = 0.020
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
strong

Chemical Properties of Wyartite

Formula:
CaU5+(UO2)2(CO3)O4(OH) · 7H2O
Essential elements:
All elements listed in formula:

Relationship of Wyartite to other Species

5.EA.05UM1997-24-CO:CaCuHUCa2Cu(UO2)2(CO3)2O3 · 3H2O
5.EA.10UrancalcariteCa(UO2)3(CO3)(OH)6 · 3H2O
5.EA.20Oswaldpeetersite(UO2)2(CO3)(OH)2 · 4H2O
5.EA.25RoubaultiteCu2(UO2)3(OH)10 · 5H2O
5.EA.30Kamotoite-(Y)Y2(UO2)4(CO3)3O4 · 14H2O
5.EA.35SharpiteCa(UO2)6(CO3)5(OH)4 · 6H2O
11.11.1StichtiteMg6Cr2(OH)16[CO3] · 4H2O
11.11.2Rutherfordine(UO2)CO3
11.11.3Joliotite(UO2)CO3 · nH2O
11.11.4GrimseliteK3Na(UO2)(CO3)3 · H2O
11.11.5BayleyiteMg2(UO2)(CO3)3 · 18H2O
11.11.6MetazelleriteCa(UO2)(CO3)2 · 3H2O
11.11.7ZelleriteCa(UO2)(CO3)2 · 5H2O
11.11.9UrancalcariteCa(UO2)3(CO3)(OH)6 · 3H2O
11.11.10SharpiteCa(UO2)6(CO3)5(OH)4 · 6H2O
11.11.11VogliteCa2Cu(UO2)(CO3)4 · 6H2O
11.11.12AndersoniteNa2Ca(UO2)(CO3)3 · 6H2O
11.11.13SwartziteMgCa(UO2)(CO3)3 · 12H2O
11.11.14RabbittiteCa3Mg3(UO2)2(CO3)6(OH)4 · 18H2O
11.11.15Kamotoite-(Y)Y2(UO2)4(CO3)3O4 · 14H2O
11.11.16Shabaite-(Nd)Ca(Nd,Sm,Y)2(UO2)(CO3)4(OH)2 · 6H2O
11.11.17Astrocyanite-(Ce)Cu2(Ce,Nd,La)2(UO2)(CO3)5(OH)2 · 1.5H2O
11.11.18Bijvoetite-(Y)(Y,Dy)2(UO2)4(CO3)4(OH)6 · 11H2O
11.11.19WidenmannitePb2(OH)2[(UO2)(CO3)2]
11.11.20ZnucaliteZn12Ca(UO2)(CO3)3(OH)22 · 4H2O

Other Names for Wyartite

Name in Other Languages:
German:Wyartit
Spanish:Wyartita

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.

References for Wyartite

Reference List:
Bulletin de la Société française de Minéralogie et de Cristallographie (1959): 82: 80-86.

American Mineralogist (1959): 44: 908.

Burns, P.C. and Finch, R.J. (1999) Wyartite: crystallographic evidence for the first pentavalent-uranium mineral. American Mineralogist (1999): 84: 1456-1460.

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 Wyartite

Localities for Wyartite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Australia
 
  • Northern Territory
    • West Arnhem Region
      • Kakadu
        • Ranger Mine
R.L. Frost, D.A. Henry, and K. Erickson, Raman spectroscopic detection of wyartite in the presence of rabejacite. Journal of Raman Spectroscopy, 2004. 35(4): p. 255- 260.
R.L. Frost, D.A. Henry, and K. Erickson, Raman spectroscopic detection of wyartite in the presence of rabejacite. Journal of Raman Spectroscopy, 2004. 35(4): p. 255- 260.
Democratic Republic of Congo (Zaïre)
 
  • Katanga (Shaba)
    • Katanga Copper Crescent
      • Shinkolobwe
[MinRec 20:288]; Burns, P.C. and Finch, R.J. (1999) Wyartite: crystallographic evidence for the first pentavalent-uranium mineral. American Mineralogist (1999): 84: 1456-1460.
France
 
  • Rhône-Alpes
    • Loire
      • Saint-Just-en-Chevalet
        • Saint-Priest-la-Prugne
Le Règne Minéral, Hors Série IV, 1998
J.-J. Périchaud: "Où trouver les minéraux d'Auvergne", Vol. 1, Editions l'Instant Durable (Clermont-Ferrand), 1985, p. 92
Mineral and/or Locality  
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