| Sayrite | |
| Formula: | Pb2(UO2)5O6(OH)24(H2O)+ |
| Imasymbol: | Syr[1] |
| Strunz: | 4/H.07-40 |
| Dana: | 5.9.6.1 |
| System: | monoclinic |
| Unit Cell: | a = 10.7 Å, b = 6.96 Å, c = 14.53 Åβ = 116.81° |
| Colour: | orange |
| Cleavage: | Distinct |
| Density: | 6.76 |
| Refractive: | 1.77 |
| Birefringence: | Biaxial (-) |
| Dispersion: | relatively weak |
| Other: | 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]