Sayrite
General
CategoryMineral
Formula
(repeating unit)
Pb2(UO2)5O6(OH)24(H2O)+
IMA symbolSyr[1]
Strunz classification4/H.07-40
Dana classification5.9.6.1
Crystal systemmonoclinic
Unit cella = 10.7 Å, b = 6.96 Å, c = 14.53 Å β = 116.81°
Identification
Colourorange
CleavageDistinct
Density6.76
Refractive index1.77
BirefringenceBiaxial (-)
Dispersionrelatively weak
Other characteristics Radioactive

Sayrite (Pb2(UO2)5O6(OH)24(H2O)) is an alteration product of uraninite named after the X-ray crystallographer David Sayre. Sayrite contains hydrogen, oxygen, uranium, and lead. It is mined at Shinkolobwe Mine, (Kasolo Mine), Kambove District, Haut-Katanga, Democratic Republic of the Congo. It is usually orange in color, but also can be reddish and yellowish. It is in the monoclinic crystal system.[2][3]

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. "Sayrite: Mineral information, data and localities". www.mindat.org. Retrieved 2019-04-03.
  3. "Sayrite Mineral Data". webmineral.com. Retrieved 2019-04-03.
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