Element Cerium
Cerium was the first of the lanthanides to be discovered, in Bastnäs, Sweden, by Jöns Jakob Berzelius and Wilhelm Hisinger in 1803, and independently by Martin Heinrich Klaproth in Germany in the same year.
An element of the rare earth family of metals. It has the atomic symbol Ce, atomic number 58, and atomic weight 140. 12.
Element Cerium is a malleable metal used in many industrial applications including catalysts, additives to fuel to reduce emissions, and to glass and enamels to change their color.
Names and Identifiers
| Chemical Formula: | Ce |
| CAS: | 7440-45-1 |
| Molecular Weight: | 140.11600 g/mol |
| EC Number : | 231-154-9 |
| MDL Number: | MFCD00010924 |
| Color: | silvery white/ gray |
| Other Names: | Cerio |
| PubChem CID: | 23974 |
| IUPAC Name: | Cerium |
| Inchl: | InChI=1S/Ce |
| InChI Key: | GWXLDORMOJMVQZ-UHFFFAOYSA-N |
| Canonical SMILES: | [Ce] |
| ICSC Number: | 1405 |
Physical & Chemical Properties
| Phase: | Solid |
| Density: | 6 .770 g/cm³ |
| Boiling Point: | 3716 K (3443 °C, 6229 °F) |
| Melting Point: | 1068 K (795 °C, 1463 °F) |
| Molecular Formula: | Ce |
| Flash Point: | n/a |
| Exact Mass: | 139.90500 |
| Symbol: |   |
| Signal Word: | Danger |
| Hazard Statements: | H228-H302-H312-H315-H319-H332-H335 |
| Precautionary Statements: | C: Corrosive; |
| Hazard Codes: | 22-23-36/38 |
| Risk Phrases: | 26-36 |
| Safety Phrases: | UN 2031 8/PG 2 |
| RIDADR: | UN 2031 8/PG 2 |
| WGK Germany: | 3 |
| RTECS: | n/a |
| Packaging Group: | III |
| Hazard Class: | n/a |
Naturally occurring isotopes
| Isotope | Mass/Da | Natural abundance (atom %) | Nuclear spin (I) | Magnetic moment (μ/μN) |
|---|---|---|---|---|
| 136Ce | 135.907140 (50) | 0.185 (2) | 0 | |
| 138Ce | 137.905985 (12) | 0.251 (2) | 0 | |
| 140Ce | 139.905433 (4) | 88.450 (51) | 0 | |
| 142Ce | 141.909241 (4) | 11.114 (51) | 0 |
Radiosotope data
| Isotope | Mass/Da | Half-life | Mode of decay | Nuclear spin | Nuclear magnetic moment |
|---|---|---|---|---|---|
| 134Ce | 133.9090 | 3.16 d | EC to 134La | 0 | |
| 135Ce | 134.90915 | 17.7 h | EC to 135La | 1/2 | |
| 137Ce | 136.90788 | 9.0 h | EC to 137La | 3/2 | |
| 139Ce | 138.90665 | 137.6 d | EC to 139La | 3/2 | 0.9 |
| 141Ce | 140.908272 | 32.50 d | β– to 139La | 7/2 | 1.1 |
| 143Ce | 142.912382 | 1.38 d | β– to 143La | 3/2 | |
| 144Ce | 143.913643 | 284.6 d | β– to 144La | 0 |