|
|
| Curium | |
| Electron Configuration | 2,8,18,32,25,9,2 |
| Electron Configuration | [Rn] 5f7 6d1 7s2 |
| Ground state | 9D°2 |
| Atomic Volume | 18.28 g/cm3 |
| Electronegativity | 1.28 |
| Magnetic ordering | No data |
 Thermal Properties |
|
| Enthalpy of Atomization | No data. |
| Enthalpy of Fusion | No data. |
| Enthalpy of Vaporisation | No data. |
| Heat Capacity | No data. |
| Thermal Conductivity | No data. |
| Thermal Expansion | No data. |
| Electrical Properties |
|
| Electrical resistivity | No data. |
| Electrical conductivity | No data. |
| Chemical Properties |
|
| Electrochemical Equivalent | 3.0727 g Ah-1 |
| Valence Electron Potential (-eV) | 44.5 |
| Ionization Potential | |
 First
|
6.02 |
| Energy Levels |
|
| Lα1 (intensity 100) |
14.9545 KeV |
| Lα2 (intensity 10) |
14.748 KeV |
| Lβ1 (intensity 38) |
19.4102 KeV |
| Lβ2 (intensity 14) |
18.1011 KeV |
| Lβ3 (intensity 2) |
19.6811 KeV |
| Lβ4 (intensity 2) |
18.5846 KeV |
| Lγ1 (intensity 8) |
22.7242 KeV |
| Lγ2 (intensity 2.7) |
23.0285 KeV |
| Lγ3 (intensity 2) |
17.25 KeV |
| Ll (intensity 6) |
12.6384 KeV |
| Atomic Radii |
|
| Empirical
|
135 pm |
| Bohr Radius
|
No data. |
| Covalent Radius
|
No data. |
| Van der Waals
|
No data. |
| Triple covalent
|
No data. |
| Metallic
|
174 pm |
| Ionic Radii (Å) |
||||
| Charge | Coordination | Crystal | Ionic | Key |
| 3 | VI | 1.11 | 0.97 | R |
| 4 | VI | 0.99 | 0.85 | R |
| VIII | 1.09 | 0.95 | R | |
| R, From r3 vs V plots. |
| C, Calculated from bond length - bond strength equations. |
| E, Estimated. |
| *, Most Reliable. |
| M, From Metallic Oxides. |
| A, Ahrens (1952) Ionic radius. |
| P, Pauling's (1960) Crystal Radius. |
| Oxidation States |
|
| Main
|
Cm+3 |
| Other
|
Cm+2, Cm+4 |
Ionisation Energies (kJ mol-1)  |
|
| M - M+ |
581 |
| Vapour Pressure |
||||||
| P (Pa) | 1 | 10 | 100 | 1K | 10K | 100K |
| T (K) | 1788 | 1982 | ||||
| Crystal Structure |
|
| Structure
|
Hexagonal close packed |
 |
a = 349.6 pm |
| b = 349.6 pm | |
| c = 1133.1 pm | |
| α = 90° | |
| β = 90° | |
| γ = 120° | |