Uranophane
Ca(UO2)2(SiO3OH)2·5H2OIMA symbol: Urprenamed
Uranophane is a silicate mineral with the formula Ca(UO2)2(SiO3OH)2·5H2O, crystallizing in the monoclinic system. It has a Mohs hardness of 2-3, typically yellow in color, with a pearly or vitreous luster, a specific gravity of 3.81-3.9. Its streak is white.
Photos
Physical properties
| Hardness (Mohs) | 2-3single sourceDana, System of Mineralogy, 6th ed. (1892) |
|---|---|
| Specific gravity | 3.81-3.9 g/cm3single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Color | yellowsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Streak | whitesingle sourceFord, Dana's Textbook of Mineralogy, 3rd ed. (1922) |
| Luster | pearly, vitreoussingle sourceDana, System of Mineralogy, 6th ed. (1892) |
Chemistry (calculated)
| Molecular weight | 856.39 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Ca 4.68%, U 55.59%, O 31.76%, Si 6.56%, H 1.41% |
Classification
| Nickel-Strunz (10th) | 9.AK.15Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 9.AK.15Wikidata (CC0) |
| Dana (8th) | 53.3.1.2Wikidata (CC0) |