| Mineral | Boltwoodite |
|---|---|
| Formula | (K,Na)(UO2)(SiO3OH) • 1.5H2O |
| Crystal Form | Monoclinic/Sphenoidal [2] |
| Cleavage | Perfect on {010}, Imperfect on {001} |
| Color | Pale yellow, Orange yellow |
| Density | 4.5 – 4.7 g/cm3 |
| Diaphaneity | Translucent |
| Fracture | Irregular/Uneven |
| Hardness | 3.5 - 4.0 |
| Lustre | Sub-vitreous, Waxy, Silky |
| Streak | White |
| Type Loc. | Pick's Delta Mine, San Rafael Dist., Emery Co., UT, USA |
| Dana 8 Class | 53.3.1.5 |
| Strunz Class | 8/B.34-60 |
| Mindat | mindat.org |
| WebMineral | WebMineral |
| ID | 323 |