Péligotite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Péligotite
Formula:
Na6(UO2)(SO4)4 · 4H2O
Colour:
Yellowish green to greenish-yellow
Lustre:
Vitreous
Hardness:
2½
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.
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 Identifiers
Mindat ID:
46970
Long-form identifier:
mindat:1:1:46970:4
GUID
(UUID V4):
(UUID V4):
bf2932a3-0d9e-4804-98ca-d3f9cf955a71
Classification of Péligotite
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
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
E : Uranyl sulfates
C : With medium-sized and large cations
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Pél | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Péligotite
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 Péligotite
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.
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 Péligotite
Formula:
Na6(UO2)(SO4)4 · 4H2O
IMA Formula:
Na6(UO2)(SO4)4(H2O)4
Crystallography of Péligotite
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)°
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 Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
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 Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest 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 Péligotite
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 Péligotite
Related Minerals - Strunz-mindat Grouping
7.EC. | Adolfpateraite | K(UO2)(SO4)(OH)(H2O) | Mon. 2/m : P21/b |
7.EC. | Beshtauite | (NH4)2(UO2)(SO4)2 · 2H2O | Mon. 2/m : P21/b |
7.EC. | Seaborgite | LiK2Na6(UO2)(SO4)5(SO3OH)(H2O) | Tric. 1 : P1 |
7.EC. | Nitscheite | (NH4)2[(UO2)2(SO4)3(H2O)2] · 3H2O | Mon. 2/m |
7.EC. | Oldsite | K2Fe2+[(UO2)(SO4)2]2(H2O)8 | Orth. mm2 : Pmn21 |
7.EC. | Libbyite | (NH4)2(Na2◻)[(UO2)2(SO4)3(H2O)]2 · 7H2O | Tet. 4 2 2 : P41 21 2 |
7.EC.05 | Cobaltzippeite | Co(UO2)2(SO4)O2 · 3.5H2O | Mon. 2/m : B2/m |
7.EC.05 | Magnesiozippeite | Mg(UO2)2(SO4)O2 · 3.5H2O | Mon. 2/m : B2/m |
7.EC.05 | Nickelzippeite | Ni2(UO2)6(SO4)3(OH)10 · 16H2O | Mon. |
7.EC.05 | Natrozippeite | Na5(UO2)8(SO4)4O5(OH)3 · 12H2O | Mon. 2/m : P21/m |
7.EC.05 | Zinczippeite | Zn(UO2)2(SO4)O2 · 3.5H2O | Mon. 2/m : B2/m |
7.EC.05 | Zippeite | K3(UO2)4(SO4)2O3(OH) · 3H2O | Mon. 2 : B2 |
7.EC.05 | Plavnoite | K0.8Mn0.6[(UO2)2O2(SO4)] · 3.5H2O | Mon. 2/m : B2/m |
7.EC.05 | Redcanyonite | (NH4)2Mn[(UO2)4O4(SO4)2](H2O)4 | Mon. 2/m : B2/m |
7.EC.05 | Ammoniozippeite | (NH4)2[(UO2)2(SO4)O2] · H2O | Orth. mmm (2/m 2/m 2/m) |
7.EC.10 | Rabejacite | Ca(UO2)4(SO4)2(OH)6 · 6H2O | Tric. 1 : P1 |
7.EC.10 | Svornostite | K2Mg[(UO2)(SO4)2]2 · 8H2O | Orth. mm2 : Pmn21 |
7.EC.15 | Marécottite | Mg3(UO2)8(SO4)4O6(OH)2 · 28H2O | Tric. 1 : P1 |
7.EC.15 | Sejkoraite-(Y) | Y2(UO2)8(SO4)4O6(OH)2 · 26H2O | Tric. 1 : P1 |
7.EC.20 | Pseudojohannite | Cu3(OH)2[(UO2)4(SO4)2] · 12H2O | Tric. 1 : P1 |
7.EC.40 | Bluelizardite | Na7(UO2)(SO4)4Cl(H2O)2 | Mon. 2/m : B2/b |
7.EC.45 | Meisserite | Na5(UO2)(SO4)3(SO3OH)(H2O) | Tric. 1 : P1 |
7.EC.45 | Fermiite | Na4(UO2)(SO4)3 · 3H2O | Orth. mm2 : Pmn21 |
7.EC.45 | Oppenheimerite | Na2(UO2)(SO4)2 · 3H2O | Tric. 1 : P1 |
7.EC.50 | Plášilite | Na(UO2)(SO4)(OH) · 2H2O | Mon. 2/m : P21/b |
7.EC.50 | Feynmanite | Na(UO2)(SO4)(OH) · 3.5H2O | Mon. |
7.EC.55 | Geschieberite | K2(UO2)(SO4)2 · 2H2O | Orth. mm2 : Pna21 |
7.EC.60 | Ottohahnite | Na6(UO2)2(SO4)5(H2O)7 · 1.5H2O | Tric. 1 : P1 |
7.EC.70 | Klaprothite | Na6(UO2)(SO4)4 · 4H2O | Mon. 2/m : P21/b |
7.EC.75 | Lussierite | Na10[(UO2)(SO4)4](SO4)2 · 3(H2O) | Mon. m : Bb |
7.EC.80 | Navrotskyite | K2Na10(UO2)3(SO4)9 · 2H2O | Orth. mmm (2/m 2/m 2/m) : Pbcm |
7.EC.85 | Pseudomeisserite-(NH4) | (NH4)2Na4[(UO2)2(SO4)5] · 4H2O | Mon. 2/m : P21/b |
7.EC.90 | Wetherillite | Na2Mg(UO2)2(SO4)4 · 18H2O | Mon. 2/m : P21/b |
Fluorescence of Péligotite
Bright bluish-green under both longwave and shortwave ultraviolet light.
Other Information
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 Péligotite
mindat.org URL:
https://www.mindat.org/min-46970.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Péligotite
Reference List:
Localities for Péligotite
Locality List
- 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.
All localities listed without proper references should be considered as questionable.
USA (TL) | |
|
Quick NavTopAbout PéligotiteUnique IdentifiersClassification Mineral SymbolsPhysical Properties Optical Data Chemical Properties Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
Blue Lizard Mine, Red Canyon Mining District, San Juan County, Utah, USA