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Péligotite

A valid IMA mineral species
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About PéligotiteHide

06373840014947402439643.jpg
Eugène-Melchior Péligot
Formula:
Na6(UO2)(SO4)4 · 4H2O
Colour:
Yellowish green to greenish-yellow
Lustre:
Vitreous
Hardness:
Specific Gravity:
2.88
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.


Unique IdentifiersHide

Mindat ID:
46970
Long-form identifier:
mindat:1:1:46970:4
GUID
(UUID V4):
bf2932a3-0d9e-4804-98ca-d3f9cf955a71

Classification of PéligotiteHide

Approved
Approval year:
2015
First published:
2017
7.EC.65

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
E : Uranyl sulfates
C : With medium-sized and large cations

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
PélIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of PéligotiteHide

Vitreous
Transparency:
Transparent
Colour:
Yellowish green to greenish-yellow
Hardness:
2½ on Mohs scale
Comment:
ca. 2.5
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
2.88(2) g/cm3 (Measured)    2.878 g/cm3 (Calculated)
Comment:
Calculated value is based on empirical formula

Optical Data of PéligotiteHide

Type:
Biaxial (-)
RI values:
nα = 1.493(1) nβ = 1.511(1) nγ = 1.515(1)
2V:
Measured: 50° (1), Calculated: 50.0°
Max Birefringence:
δ = 0.022
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
r>v, distinct
Optical Extinction:
X ∧ c= 3°; Y ∧ b= 43°; Z ∧ a= 40°.
Pleochroism:
Visible
Comments:
X = colourless, Y = light yellowish green, Z = light yellowish green.
Comments:
X < Y ≈ Z.

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
Morphology:
{001}, {110} and {110}
Twinning:
No twinning observed in type material.

X-Ray Powder DiffractionHide

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

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 7: Great Oxidation Event<2.4
47a : [Near-surface hydration of prior minerals]
47b : [Sulfates and sulfites]
47f : [Uranyl (U⁶⁺) minerals]
Stage 10b: Anthropogenic minerals<10 Ka
55 : Anthropogenic mine minerals

Type Occurrence of PéligotiteHide

General Appearance of Type Material:
Equant rhombs up to ∼0.5 mm, but usually much smaller. Crystal faces often concave with rounded edges. Crystals typically occur in subparallel aggregates and drusy intergrowths.
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 Academy of Sciences.
Associated Minerals at Type Locality:
Reference:
Kampf, A.R., Plášil, J., Kasatkin, A.V., Marty, J., Čejka, J. (2017) 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: 81(4): 753-779.

Synonyms of PéligotiteHide

Related Minerals - Strunz-mindat GroupingHide

7.EC.AdolfpateraiteK(UO2)(SO4)(OH)(H2O)Mon. 2/m : P21/b
7.EC.Beshtauite(NH4)2(UO2)(SO4)2 · 2H2OMon. 2/m : P21/b
7.EC.SeaborgiteLiK2Na6(UO2)(SO4)5(SO3OH)(H2O)Tric. 1 : P1
7.EC.Nitscheite(NH4)2[(UO2)2(SO4)3(H2O)2] · 3H2OMon. 2/m
7.EC.OldsiteK2Fe2+[(UO2)(SO4)2]2(H2O)8Orth. mm2 : Pmn21
7.EC.Libbyite(NH4)2(Na2◻)[(UO2)2(SO4)3(H2O)]2 · 7H2OTet. 4 2 2 : P41 21 2
7.EC.05CobaltzippeiteCo(UO2)2(SO4)O2 · 3.5H2OMon. 2/m : B2/m
7.EC.05MagnesiozippeiteMg(UO2)2(SO4)O2 · 3.5H2OMon. 2/m : B2/m
7.EC.05NickelzippeiteNi2(UO2)6(SO4)3(OH)10 · 16H2O Mon.
7.EC.05NatrozippeiteNa5(UO2)8(SO4)4O5(OH)3 · 12H2OMon. 2/m : P21/m
7.EC.05ZinczippeiteZn(UO2)2(SO4)O2 · 3.5H2OMon. 2/m : B2/m
7.EC.05ZippeiteK3(UO2)4(SO4)2O3(OH) · 3H2OMon. 2 : B2
7.EC.05PlavnoiteK0.8Mn0.6[(UO2)2O2(SO4)] · 3.5H2OMon. 2/m : B2/m
7.EC.05Redcanyonite(NH4)2Mn[(UO2)4O4(SO4)2](H2O)4Mon. 2/m : B2/m
7.EC.05Ammoniozippeite(NH4)2[(UO2)2(SO4)O2] · H2OOrth. mmm (2/m 2/m 2/m)
7.EC.10RabejaciteCa(UO2)4(SO4)2(OH)6 · 6H2OTric. 1 : P1
7.EC.10SvornostiteK2Mg[(UO2)(SO4)2]2 · 8H2OOrth. mm2 : Pmn21
7.EC.15MarécottiteMg3(UO2)8(SO4)4O6(OH)2 · 28H2OTric. 1 : P1
7.EC.15Sejkoraite-(Y)Y2(UO2)8(SO4)4O6(OH)2 · 26H2OTric. 1 : P1
7.EC.20PseudojohanniteCu3(OH)2[(UO2)4(SO4)2] · 12H2OTric. 1 : P1
7.EC.40BluelizarditeNa7(UO2)(SO4)4Cl(H2O)2Mon. 2/m : B2/b
7.EC.45MeisseriteNa5(UO2)(SO4)3(SO3OH)(H2O)Tric. 1 : P1
7.EC.45FermiiteNa4(UO2)(SO4)3 · 3H2OOrth. mm2 : Pmn21
7.EC.45OppenheimeriteNa2(UO2)(SO4)2 · 3H2OTric. 1 : P1
7.EC.50PlášiliteNa(UO2)(SO4)(OH) · 2H2OMon. 2/m : P21/b
7.EC.50FeynmaniteNa(UO2)(SO4)(OH) · 3.5H2OMon.
7.EC.55GeschieberiteK2(UO2)(SO4)2 · 2H2OOrth. mm2 : Pna21
7.EC.60OttohahniteNa6(UO2)2(SO4)5(H2O)7 · 1.5H2OTric. 1 : P1
7.EC.70KlaprothiteNa6(UO2)(SO4)4 · 4H2OMon. 2/m : P21/b
7.EC.75Lussierite Na10[(UO2)(SO4)4](SO4)2 · 3(H2O)Mon. m : Bb
7.EC.80NavrotskyiteK2Na10(UO2)3(SO4)9 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbcm
7.EC.85Pseudomeisserite-(NH4)(NH4)2Na4[(UO2)2(SO4)5] · 4H2OMon. 2/m : P21/b
7.EC.90WetherilliteNa2Mg(UO2)2(SO4)4 · 18H2OMon. 2/m : P21/b

Fluorescence of PéligotiteHide

Bright bluish-green under both longwave and shortwave ultraviolet light.

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.

Internet Links for PéligotiteHide

References for PéligotiteHide

Reference List:

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 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). 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
USA (TL)
 
  • Utah
    • San Juan County
      • Red Canyon Mining District
 
Mineral and/or Locality  
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