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75
Re
186.207
Rhenium |
Appearance & Characteristics | Reactions |
Other Forms Radius | Conductivity | Abundance
General:
| Name: Rhenium | Symbol: Re |
| Group: Trans. Met. | Atomic weight: 186.207 |
| Density @ 293 K: 21.0 g/cm3 | Atomic volume: 8.85 cm3/mol |
| Group: Trans. Met. | Discovered: 1925 |
States
| State (s, l, g): solid | |
| Melting point: 3453.2 K | Boiling point: 5923 K |
| Heat of fusion: 33.20 kJ/mol | Heat of vaporization: 715.0 kJ/mol |
Energies
| 1st ionization energy: 760 kJ/mole | |
| Electronegativity: 1.9 | 2nd ionization energy: kJ/mole |
| Electron affinity: 14 kJ/mole | 3rd ionization energy: kJ/mole |
| Specific heat: 0.13 J/gK | Heat atomization: 770 kJ/mole atoms |
Oxidation & Electrons
| Shells: 2,8,18,32,13,2 | Electron configuration: [Xe] 4f14 5d5 6s2 |
| Minimum oxidation number: -3 | Maximum oxidation number: 7 |
| Min. common oxidation no.: 0 | Max. common oxidation no.: 4 |
Appearance & Characteristics
| Structure: hcp: hexagonal close pkd | Color: silvery-white |
| Uses: catalysts, thermocouples | Toxicity: |
| Hardness: mohs | Characteristics: high melting point |
Reactions
| Reaction with air: mild, w/ht => Re2O7 | |
| Reaction with 6 M HCl: none | Reaction with 6 M HCl: none |
| Reaction with 15 M HNO3: mild, => HReO4 | Reaction with 6 M NaOH: |
Other Forms
| Number of isotopes: 2 | Hydride(s): none |
| Oxide(s): Re2O5 ReO3 Re2O7 | Chloride(s): Re3Cl9 ReCl4 ReCl5 ReCl6 |
Radius
| Ionic radius (2- ion): pm | Ionic radius (1- ion): pm |
| Atomic radius: 137 pm | Ionic radius (1+ ion): pm |
| Ionic radius (2+ ion): pm | Ionic radius (3+ ion): pm |
Conductivity
| Thermal conductivity: 48 J/m-sec-deg | |
| Electrical conductivity: 51.813 1/mohm-cm | Polarizability: 9.7 A^3 |
Abundance
| Source: Molybdenite (sulfide) | |
| Rel. abund. solar system: -1.287 log | Abundance earth's crust: -2.3 log |
| cost, pure: 540 $/100g | cost, bulk: $/100g |
