Cov khoom
| Thorium, 90 Ib | |
| Cas No. | 7440-29-1 : kuv |
| Qhov tshwm sim | silvery, feem ntau nrog dub tarnish |
| Atomic Number (Z) | 90 |
| Phase ntawm STP | khov kho |
| Melting point | 2023 K (1750 ° C, 3182 ° F) |
| Boiling point | 5061 K (4788 ° C, 8650 ° F) |
| Ceev (ze rt) | 11.7 g / cm3 |
| Kub ntawm fusion | 13.81 kJ / mol |
| Kub ntawm vaporisation | 514 kJ / mol |
| Molar tshav kub muaj peev xwm | 26.230 J/(mol·K) |
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Thorium (IV) oxide (Thorium Dioxide) (ThO2) hmoov Purity Min.99%
Thorium Dioxide (ThO2), kuj huthorium (IV) oxide, yog ib qho insoluble thermally ruaj khov Thorium qhov chaw. Nws yog crystalline khoom thiab feem ntau dawb los yog daj xim. Kuj tseem hu ua thoria, nws yog tsim los ntawm cov khoom lag luam ntawm lanthanide thiab uranium ntau lawm. Thorianite yog lub npe ntawm cov mineralogical daim ntawv ntawm thorium dioxide. Thorium muaj nuj nqis heev hauv iav thiab ceramic ntau lawm ua cov xim daj daj vim nws qhov zoo tshaj plaws reflectanceHigh Purity (99.999%) Thorium Oxide (ThO2) Hmoov ntawm 560 nm. Oxide compounds tsis ua rau hluav taws xob.