main category

 

subordinate category

SEARCH


contents

Ba   -   Barium (56/137.34)

Material List
  • Naturally occurring isotopes: 138 137 136 135 134 130 132
  • Density: 3.59 (293.15K) g/cm3
  • Melting point: 725 oC
  • Boiling point: 1640 oC
  • Latent heat of fusion: 55.79 J/g
  • Specific heat: 0.204 J/g/K (at room temp.)
  • Coefficient of lineal thermal expansion: 1.90E-05 cm/cm/K (at room temp.)
  • Thermal conductivity: 1.84E-01 W/cm/K (at room temp.)
  • Electrical resistivity: hm-cm (at room temp.)
  • lonization potential (1st): 5.212 eV
  • Electronic work function Φ: 2.7
  • Oxidation potentials: Ba → Ba2+ + 2e = 2.906 V
  • Chemical valence: 2
  • Electrochemical equivalents: 2.5621 g/amp-hr
  • lonic radius: 1.35 angstrom
  • Valence electron potential: 21.3 -eV
  • Principal quantum number: 6
  • Principal electron shells: K L M N O P
  • Electronic configuration: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 6s2
  • Valence electrons: 6s2
  • Crystal form: BCC
  • Half life:
  • Cross section σ: 1.2 ± 0.1 barns
  • Vapor pressure: 9.80E+01 Pa (at melting point)