Soddyite

(repeating unit)(UO2)2SiO4·2H2OIMA symbolSod[1]Strunz classification9.AK.05Dana classification53.03.03.01Crystal systemOrthorhombicCrystal classDipyramidal (mmm)
H-M symbol: (2/m 2/m 2/m)Space groupF dddUnit cell1,745.03 ųIdentificationColorCanary yellow to amber yellowCleavagePerfect on {001}, good on {111}Mohs scale hardness3 - 4LusterVitreous, greasy, dullStreakYellowDiaphaneityTransparent, translucent, opaqueDensity4.627Optical propertiesBiaxial (-)Refractive indexnα = 1.650 - 1.654, nβ = 1.685, nγ = 1.699 - 1.715Birefringence0.049 - 0.061DispersionRelatively weakUltraviolet fluorescenceWeak orange yellowOther characteristics Radioactive

Soddyite is a mineral of uranium. It has yellow crystals and usually mixed with curite in oxidized uranium ores. It is named after the British radiochemist and physicist Frederick Soddy (1877–1956). Soddyite has been a valid species since 1922, following its discovery in the locality of the Shinkolobwe uranium mine in the Haut-Katanga Province of the Democratic Republic of the Congo (DRC).[2][3][4]

References

  1. ^ 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.
  2. ^ Webmineral data for soddyite
  3. ^ Mindat information page for Soddyite
  4. ^ Handbook of Mineralogy


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