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Lepersonnite-(Gd)

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About Lepersonnite-(Gd)Hide

07534090015130019548286.jpg
Jacques, Lambert, Désiré Lepersonne
Formula:
Ca(Gd,Dy)2(UO2)24(SiO4)4(CO3)8(OH)24 · 48H2O
Colour:
Bright yellow
Specific Gravity:
3.97
Crystal System:
Orthorhombic
Name:
After Jacques Lepersonne (Mulhouse, France October 26, 1909 - Etterbeek, Brussels, August 10, 1997); Royal Belgian Museum for Central Africa.
A unique species being the only approved mineral with dominant gadolinium.

Not approved phases with species-defining gadolinium were identified in the The Moon regolith; there are also single finds from Kudriavy volcano, Russia (an oxide phase) and Kyauk Tha Mtn, Myanmar (Unnamed (Gd-dominant monazite)).

For more informations about separation of Gd, Dy, and Sm from more abundant REEs see Unnamed (Possible Samarium Chloride) and Pavlovskoe REE-coal deposit site.


Classification of Lepersonnite-(Gd)Hide

Approved
5.EG.10

5 : CARBONATES (NITRATES)
E : Uranyl Carbonates
G : With SO4 or SiO4
17.1.12.1

17 : COMPOUND CARBONATES
1 : Miscellaneous
17.4.12

17 : Silicates Containing other Anions
4 : Silicates with carbonates

Pronounciation of Lepersonnite-(Gd)Hide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of Lepersonnite-(Gd)Hide

Transparency:
Transparent, Translucent
Colour:
Bright yellow
Density:
3.97(5) g/cm3 (Measured)    4.01 g/cm3 (Calculated)

Optical Data of Lepersonnite-(Gd)Hide

Type:
Biaxial (-)
RI values:
nα = 1.638 nβ = 1.666 nγ = 1.682
2V:
Measured: 73° , Calculated: 72°
Max Birefringence:
δ = 0.044
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
relatively weak
Pleochroism:
Visible
Comments:
X = pale yellow; Y = Z = bright yellow

Chemical Properties of Lepersonnite-(Gd)Hide

Formula:
Ca(Gd,Dy)2(UO2)24(SiO4)4(CO3)8(OH)24 · 48H2O
IMA Formula:
CaGd2(UO2)24(CO3)8Si4O28 · 60H2O

Crystallography of Lepersonnite-(Gd)Hide

Crystal System:
Orthorhombic
Cell Parameters:
a = 16.23(3) Å, b = 38.74(9) Å, c = 11.73(3) Å
Ratio:
a:b:c = 0.419 : 1 : 0.303
Unit Cell V:
7,375.24 ų (Calculated from Unit Cell)
Z:
2
Comment:
Point Group: 2/m 2/m 2/m or mm2 ;Space Group: Pnnm or P nn2

Type Occurrence of Lepersonnite-(Gd)Hide

General Appearance of Type Material:
As mammilary crusts or spherules, to 5 mm in diameter, composed of radiating acicular crystals elongated along [001].
Place of Conservation of Type Material:
Royal Museum for Central Africa, Tervuren
National Museum for Natural History, Washington
Associated Minerals at Type Locality:
Reference:
Deliens M, Piret P (1982) Bijvoetite et lepersonnite, carbonates hydratés d'uranyle et de terres rares de Shinkolobwe, Zaïre. The Canadian Mineralogist 20, 231-238

Synonyms of Lepersonnite-(Gd)Hide

Other Language Names for Lepersonnite-(Gd)Hide

Common AssociatesHide

Associated Minerals Based on Photo Data:
4 photos of Lepersonnite-(Gd) associated with Studtite[(UO2)(O2)(H2O)2] · H2O
4 photos of Lepersonnite-(Gd) associated with BecquereliteCa(UO2)6O4(OH)6 · 8H2O
3 photos of Lepersonnite-(Gd) associated with FourmarieritePb(UO2)4O3(OH)4 · 4H2O
3 photos of Lepersonnite-(Gd) associated with UraniniteUO2
2 photos of Lepersonnite-(Gd) associated with Gummite
2 photos of Lepersonnite-(Gd) associated with CuritePb3(UO2)8O8(OH)6 · 3H2O

Related Minerals - Nickel-Strunz GroupingHide

5.EG.05SchröckingeriteNaCa3(UO2)(CO3)3(SO4)F · 10H2OTric. 1 : P1
5.EG.05UM1997-27-CO:CaHKSUKCa3(UO2)(CO3)3(SO4)F•10H2O

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

17.4.1TilleyiteCa5(Si2O7)(CO3)2Mon.
17.4.2SpurriteCa5(SiO4)2(CO3)Mon.
17.4.3ParaspurriteCa5(SiO4)2(CO3)Mon.
17.4.4ScawtiteCa7(Si3O9)2CO3 · 2H2OMon. 2/m
17.4.5FukaliteCa4[Si2O6][CO3](OH)2Mon. 2/m : P21/b
17.4.6MeioniteCa4Al6Si6O24CO3Tet. 4/m : I4/m
17.4.7Cancrinite(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2OHex. 6 : P63
17.4.8CarletoniteKNa4Ca4Si8O18(CO3)4(OH,F) · H2OTet. 4/mmm (4/m 2/m 2/m) : P4/mbm
17.4.9Iimoriite-(Y)Y2[SiO4][CO3]Tric.
17.4.10Kainosite-(Y)Ca2(Y,Ce)2(Si4O12)(CO3) · H2OOrth. mmm (2/m 2/m 2/m)
17.4.11Caysichite-(Y)Ca2Y2Si4O10(CO3)3 · 4H2OOrth. mm2
17.4.13AshburtonitePb4Cu4(Si4O12)(HCO3)4(OH)3Cl · H2OTet.
17.4.14Surite(Pb,Ca)3(Al,Fe2+,Mg)2((Si,Al)4O10)(CO3)2(OH)2Mon.
17.4.15Tundrite-(Ce)Na2Ce2Ti(SiO4)(CO3)2O2Tric. 1 : P1
17.4.16Tundrite-(Nd)Na2(Nd,Ce)2Ti(SiO4)(CO3)2O2

Other InformationHide

Notes:
Radioactive
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 Lepersonnite-(Gd)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Deliens, M., Piret, P. (1982) Bijvoetite et lepersonnite, carbonates hydratés d’uranyle et de terres rares de Shinkolobwe, Zaïre. Canadian Mineralogist: 20: 231–238 (in French with English abs.)
American Mineralogist (1983): 68: 1248.

Internet Links for Lepersonnite-(Gd)Hide

Localities for Lepersonnite-(Gd)Hide

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.
DR Congo (TL)
 
  • Haut-Katanga
    • Kambove District
      • Shinkolobwe
Deliens, M., Piret, P. (1982) Bijvoetite et lepersonnite, carbonates hydratés d'uranyle et de terres rares de Shinkolobwe, Zaire. Canadian Mineralogist, 20(2), 231-238.; Deliens, M. (1996) Overzicht van de mineralogie van de koper-, kobalt- en uraniumvoorkomens in Zuid-Shaba (Zaïre). Pages 35-49 in: Schatten der Aarde. Van mineraal tot juweel. Tentoonstelling in de abdij Saint-Gérard de Brogne van 27 april tot 27 oktober 1996. Catalogus opgemaakt onder de leiding van R. Warin, AGAB en P. Van hee, MKA (in Dutch).
 
Mineral and/or Locality  
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