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Péligotite

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About PéligotiteHide

Eugène-Melchior Péligot
Formula:
Na6(UO2)(SO4)4·4H2O
Colour:
yellowish green to greenish-yellow
Hardness:
Crystal System:
Triclinic
Name:
to honour Eugène-Melchior Péligot (24 March 1811 in Paris – 15 April 1890 in Paris), French chemist credited for isolation of the first sample of metallic uranium
Dimorph of:
Related to ottohahnite.

Also chemically similar to fermiite and oppenheimerite; further, lesser similarity with sulfate-hydrosulfates belakovskiite and meisserite, and basic sulfates plášilite and natrozippeite.

Found together with klaprothite and ottohahnite; these three minerals are very similar in terms of physical and chemical properties (colour, fracture, hardness, water solubility, fluorescence).

The structure is similar to that of klaprothite and comprises [(UO2)(SO4)4]6– clusters, with one of the sulphate tetrahedra being doubly (bidentate) linked to UO7 polyhedron; Na-O polyhedra provide two types of linkages: (1) for the clusters, to give thick heteropolyhedral layers, and (2) between the layers, to form the framework. The structural difference between the two minerals lies in the layer-linking Na-O polyhedra.


Classification of PéligotiteHide

Approved, Pending publication
Approval Year:
2015

Physical Properties of PéligotiteHide

Colour:
yellowish green to greenish-yellow
Hardness:
2½ on Mohs scale
Comment:
ca. 2.5
Tenacity:
Brittle
Fracture:
Irregular/Uneven

Chemical Properties of PéligotiteHide

Formula:
Na6(UO2)(SO4)4·4H2O
IMA Formula:
Na6(UO2)(SO4)4(H2O)4

Crystallography of PéligotiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Setting:
P1
Cell Parameters:
a = 9.81511(18) Å, b = 9.9575(2) Å, c = 10.6289(8) Å
α = 88.680(6)°, β = 73.990(5)°, γ = 89.205(6)°
Ratio:
a:b:c = 0.986 : 1 : 1.067
Unit Cell V:
998.22 ų
Z:
2

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
10.19(39)
9.51(48)
7.11(100)
5.14(63)
4.54(43)
4.307(53)
3.418(73)
3.121(74)

Type Occurrence of PéligotiteHide

Place of Conservation of Type Material:
Cotype material is deposited in the collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles,CA 90007, USA, catalogue numbers 65610, 65614, 65615 and 65616, and the Fersman Mineralogical Museum of the Russian

Synonyms of PéligotiteHide

Fluorescence of PéligotiteHide

bright bluish-green

Other InformationHide

Notes:
easily soluble in RT water; Raman spectrum is given as is similar to that of klaprothite and ottohahnite
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 PéligotiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kampf, A.R., Plášil, J., Kasatkin, A.V., Marty, J. Čejka, J. (2016) Péligotite, IMA2015-088. CNMNC Newsletter No. 29, February 2016, page 201. Mineralogical Magazine: 80: 199–205.
Kampf, A.R., Plášil, J., Kasatkin, A.V., Marty, J., Čejka, J. (2016): Klaprothite, péligotite and ottohahnite, three new sodium uranyl sulfate minerals with bidentate UO7-SO4 linkages from the Blue Lizard mine, San Juan County, Utah, USA. Mineralogical Magazine, 80, (in press); http://forum.amiminerals.it/viewtopic.php?f=5&t=12850 (2016)

Internet Links for PéligotiteHide

Localities for PéligotiteHide

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.
USA (TL)
 
  • Utah
    • San Juan Co.
      • White Canyon District
        • Red Canyon
Kampf, A.R., Plášil, J., Kasatkin, A.V., Marty, J. and Čejka, J. (2016) Péligotite, IMA2015-088. CNMNC Newsletter No. 29, February 2016, page 201; Mineralogical Magazine, 80, 199–205.
Mineral and/or Locality  
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