Article · Wikipedia archive · Last revised Jul 11, 2026

Sayrite

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 and is in the monoclinic crystal system.

Last revised
Jul 11, 2026
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Sayrite
General
CategoryMinerals
FormulaPb2(UO2)5O6(OH)24(H2O)+
IMA symbolSyr1
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
Orange crystals of sayrite. source ↗

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 and is in the monoclinic crystal system.23

References

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.