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Rb   -   Rubidium (37/85.4678)

Material List
  • Naturally occurring isotopes: 85 87
  • Density: 1.532 (293.15K) g/cm3
  • Melting point: 38.89 oC
  • Boiling point: 686 oC
  • Latent heat of fusion: 27.43 J/g
  • Specific heat: 0.3634 J/g/K (at room temp.)
  • Coefficient of lineal thermal expansion: 9.00E-05 cm/cm/K (at room temp.)
  • Thermal conductivity: 5.82E-01 W/cm/K (at room temp.)
  • Electrical resistivity: 1.28E-05 hm-cm (at room temp.)
  • lonization potential (1st): 4.177 eV
  • Electronic work function Φ: 2.16
  • Oxidation potentials: Rb → Rb+ + e = 2.925 V
  • Chemical valence: 1
  • Electrochemical equivalents: 3.1888 g/amp-hr
  • lonic radius: 1.52 angstrom
  • Valence electron potential: 9.47 -eV
  • Principal quantum number: 5
  • Principal electron shells: K L M N O
  • Electronic configuration: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 5s1
  • Valence electrons: 5s1
  • Crystal form: BCC
  • Half life:
  • Cross section σ: 0.5 ± 0.1 barns
  • Vapor pressure: 1.56E-04 Pa (at melting point)