Lepersonnite-(Gd)
Ca(Gd,Dy)2(UO2)24(SiO4)4(CO3)8(OH)24·48H2OIMA symbol Lps-Gd[1] Strunz classification 5.EG.10 (10 ed)
8/B.38-10 (8 ed) Dana classification 17.1.12.1 Crystal system Orthorhombic Crystal class Pyramidal (mm2) and dipyramidal (mmm) Space group Pnnm or Pnn2 Identification Color Yellow (bright) Crystal habit Needle-like crystals in crusts (mammilary) or spherules Specific gravity Fass Density 3.97 (measured) Optical properties Biaxal (-) Refractive index nα = 1.638, nβ = 1.666, nγ = 1.682 2V angle 73° (calculated) Other characteristics Radioactive References [2][3][4]
8/B.38-10 (8 ed)
Lepersonnite-(Gd) is a very rare-earth element and uranium mineral with the chemical formula Ca(Gd,Dy)2(UO2)24(SiO4)4(CO3)8(OH)24·48H2O. It occurs with bijvoetite-(Y) in the Shinkolobwe deposit in the Democratic Republic of the Congo, famous for rare uranium minerals. It is the only confirmed mineral with essential gadolinium[2][4][5] and is named after the Belgian geologist Jacques Lepersonne.
References
- ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
- ^ a b Deliens, M., and Piret, P., 1982. Bijvoetite et lepersonnite, carbonates hydrates d'uranyle et des terres rares de Shinkolobwe, Zaïre. Canadian Mineralogist 20, 231–238.
- ^ "Lepersonnite-(Gd) - Handbook of Mineralogy" (PDF). Handbookofmineralogy.org. Retrieved 2016-03-08.
- ^ a b "Lepersonnite-(Gd): Lepersonnite-(Gd) mineral information and data". Mindat.org. Retrieved 2016-03-04.
- ^ Gadolinium: The mineralogy of gadolinium - Mindat. org [1]
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