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Rhenium

75
Re
186.207
Rhenium
 General | States | Energies | Oxidation & Electrons | 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): s
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 6M HCl: none reaction with 6M HCl: none
reaction with 15M HNO3: mild, =>HReO4 reaction with 6M 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