| Mineral | Weeksite |
|---|---|
| Formula | K2(UO2)2(Si5O13) · 4H2O |
| Crystal Form | Monoclinic/Prismatic [2/m] |
| Cleavage | Two good prismatic cleavages |
| Color | Yellow |
| Density | 4.0 – 4.1 g/cm3 |
| Diaphaneity | Transparent to translucent |
| Hardness | 1.0 - 2.0 |
| Lustre | Waxy, Silky |
| Streak | Yellow |
| Type Loc. | Autunite No. 8 claim, Topaz Mtn., Thomas Range, Juab Co., UT, USA |
| Dana 8 Class | 53.3.2.1 |
| Strunz Class | 8/H.37-10 |
| Mindat | mindat.org |
| WebMineral | WebMineral |
| ID | 443 |