|
78
Pt
195.09
Platinum |
Appearance & Characteristics | Reactions |
Other Forms Radius | Conductivity | Abundance
General:
| Name: Platinum | Symbol: Pt |
| Group: Trans. Met. | Atomic weight: 195.09 |
| Density @ 293 K: 21.45 g/cm3 | Atomic volume: 9.10 cm3/mol |
| Group: Trans. Met. | Discovered: 1748 |
States
| State (s, l, g): solid | |
| Melting point: 2045.2 K | Boiling point: 4443 K |
| Heat of fusion: 19.60 kJ/mol | Heat of vaporization: 510.0 kJ/mol |
Energies
| 1st ionization energy: 870 kJ/mole | |
| Electronegativity: 2.28 | 2nd ionization energy: 1791 kJ/mole |
| Electron affinity: 205.3 kJ/mole | 3rd ionization energy: kJ/mole |
| Specific heat: 0.13 J/gK | Heat atomization: 565 kJ/mole atoms |
Oxidation & Electrons
| Shells: 2, 8, 18, 32, 17, 1 | Electron configuration: [Xe] 4f14 5d9 6s1 |
| Minimum oxidation number: 0 | Maximum oxidation number: 6 |
| Min. common oxidation no.: 0 | Max. common oxidation no.: 4 |
Appearance & Characteristics
| Structure: fcc: face-centered cubic | Color: silvery-white |
| Uses: jewelry, catalysts | Toxicity: |
| Hardness: 4.3 mohs | Characteristics: low reactivity, ductile |
Reactions
| Reaction with air: none | |
| Reaction with 6 M HCl: none | Reaction with 6 M HCl: none |
| Reaction with 15 M HNO3: none | Reaction with 6 M NaOH: none |
Other Forms
| Number of isotopes: 6 | Hydride(s): none |
| Oxide(s): PtO2 | Chloride(s): PtCl2 PtCl4 |
Radius
| Ionic radius (2- ion): pm | Ionic radius (1- ion): pm |
| Atomic radius: 139 pm | Ionic radius (1+ ion): pm |
| Ionic radius (2+ ion): 94 pm | Ionic radius (3+ ion): pm |
Conductivity
| Thermal conductivity: 71.6 J/m-sec-deg | |
| Electrical conductivity: 94.34 1/mohm-cm | Polarizability: 6.5 A^3 |
Abundance
| Source: nickel ores (sulfides) | |
| Rel. abund. solar system: 0.127 log | Abundance earth's crust: -2.3 log |
| cost, pure: 4700 $/100g | cost, bulk: 1200 $/100g |
