main category

 

subordinate category

SEARCH


contents

La   -   Lanthanum (57/138.906)

Material List
  • Naturally occurring isotopes: 139 138
  • Density: 6.145 (298.15K) g/cm3
  • Melting point: 921 oC
  • Boiling point: 3457 oC
  • Latent heat of fusion: 81.4 J/g
  • Specific heat: 0.195 J/g/K (at room temp.)
  • Coefficient of lineal thermal expansion: 5.20E-06 cm/cm/K (at room temp.)
  • Thermal conductivity: 1.34E-01 W/cm/K (at room temp.)
  • Electrical resistivity: 5.60E-05 hm-cm (at room temp.)
  • lonization potential (1st): 5.577 eV
  • Electronic work function Φ: 3.5
  • Oxidation potentials: La → La3+ + 3e = 2.522 V
  • Chemical valence: 3
  • Electrochemical equivalents: 1.7275 g/amp-hr
  • lonic radius: 1.061 angstrom
  • Valence electron potential: 40.71 -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 5d1 6s2
  • Valence electrons: 5d1 6s2
  • Crystal form: HCP
  • Half life:
  • Cross section σ: 8.9 ± 0.2 barns
  • Vapor pressure: 1.33E-07 Pa (at melting point)