• Class: Transition Metals
• Period: 6
• IUPAC group: 7
• Traditional: VIIa

• Discovered in: 1925 by Noddack et. al.
• Origin of name: LaTin: Rhenus, (the Rhine)
• Historical or alternate name:

Molybdenite, gadolinite, columbite & plaTinum ores

Silvery metal or grey powder. Tarnishes in moist air. Resists corrosion and oxidation. Dissolves in nitric and Sulfuric acids.

• Atmosphere: ~0.0 ppm
• Primitive mantle: 0.00025 ppm
• Sea water: 1e-10 ppm
• Metallic meteorite: 0.0369 ppm
• ConTinental crust: 0.0005 ppm
• Solar photosphere: <0.3 log of abundance
• Oceanic crust: 0.0009 ppm
• Solar system: 0.0507 relative to Si=1.0e6

   Hazards

Radioactive..

• Lower:
• Upper:0.01

Rhenium Physical Properties

 Transitional Data

• State: Solid
• Density: 20.53 g/cm3

 Molar enthalpy

• Atomization: 769.0 kJ mol-1
• Fusion: 33.1 kJ mol-1
• Vaporization: 704.25 kJ mol-1

 Transition points

• MelTing point: 3453.0 K
• Boiling point: 5900.0 K
• Critical temperature: 20500.0 K

 Molar properties

• Atomic weight: 186.207 g/mole
• Molar volume: 8.916 cm3 mol-1

 Crystal structure sequence

hexagonal-close-packed

 Thermodynamics

• State: solid
  • Enthalpy 0
  • Gibbs function 0
  • Entropy 36.86
  • Heat Capacity 25.48

• State: gas
  • Enthalpy 769.9
  • Gibbs function 724.6
  • Entropy 188.938
  • Heat Capacity 20.786

 Miscellaneous physical

• Electrical resistivity: 19.3 µ-ohms/cm
• Debye temperature: 430.0 K
• Thermal conductivity: 47.9 W / m / K
• Coefficient of linear expansion: 6.2Coef. per K
• Mass magnetic susceptibility: 4.56e-9
• X-ray diffraction mass absorption coefficients:
• CuK: 179 (µ/p)/cm2 g-1
• MoK: 103 (µ/p)/cm2 g-1

Rhenium Chemical Properties

 Chemical basics:

• Oxidation states: +4 +5 +6 +7
• Molecular wt: 186.207 g/mole

 Radii

• Covalent: 128 pm
• Atomic: 137.0 pm
• Van der Waals: pm

 Ions:

• ion: +4 pm 63.0
• ion: +5 pm 58.0
• ion: +6 pm 55.0
• ion: +7 pm 54.0

 Covalent bonds

 Effective nuclear charge

• Slater: 3.60
• Clementi: 10.12
• Froese-Fischer: 14.62

 Electronegativity

• Pauling: 1.9
• Allred-Rochow: 1.46

 Standard reactions

Rhenium Nuclear Properties

• Known 20
• Listed 5

• Known 177 - 192
• Listed 183 - 187

• % Occ.:Natural
• Mossbauer NRA:
• Nuclear spin/Quantum no.:
• Radioisotopes:
  • Half-life: 71.0 days
  • Decay mode: E.C.,
  • Source:
• Notes

• % Occ.:Natural
• Mossbauer NRA:
• Nuclear spin/Quantum no.:
• Radioisotopes:
  • Half-life: 38.0 days
  • Decay mode: E.C.,
  • Source:
• Notes

• % Occ.:Natural 37.40%
• Mossbauer NRA:
• Nuclear spin/Quantum no.: 5/2
• Radioisotopes:
  • Half-life:
  • Decay mode:
  • Source:
• Notes

• % Occ.:Natural
• Mossbauer NRA:
• Nuclear spin/Quantum no.:
• Radioisotopes:
  • Half-life: 0.2 E6 years
  • Decay mode: Beta- E.C.,
  • Source:
• Notes med

• % Occ.:Natural 62.60%
• Mossbauer NRA: 21.5
• Nuclear spin/Quantum no.: 5/2
• Radioisotopes:
  • Half-life: 45.6 E9 years
  • Decay mode: Beta-
  • Source:
• Notes date

• Isotope Cross-section 85±5 barns

• Absolute sensitivity: 4.93e-2 1H=1.0
• Relative sensitivity: 0.13 1H=1.0
• Receptivity: 280 13C=1.0
• Magnetogyric ratio: 6.0255e7 rad / T / s
• Quadropole moment: 2.8e-28 m2
• Frequency: 22.513 MHz
• Reference: NaReO4

Rhenium Energy Properties

Electrons

• Ground state electron configuration: [Xe] 4f14 5d5 6s2
• Electron affinity: 37 kJ mol-1
• Filling orbitals:

Spectral lines

 Ionization energies

 Atomic energy levels