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Tl   -   Thallium (81/204.37)

Material List
  • Naturally occurring isotopes: 205 203
  • Density: 11.85 (293.15K) g/cm3
  • Melting point: 303.5 oC
  • Boiling point: 1457 ± 10 oC
  • Latent heat of fusion: 20.9 J/g
  • Specific heat: 0.129 J/g/K (at room temp.)
  • Coefficient of lineal thermal expansion: 2.80E-05 cm/cm/K (at room temp.)
  • Thermal conductivity: 4.61E-01 W/cm/K (at room temp.)
  • Electrical resistivity: 1.80E-05 hm-cm (at room temp.)
  • lonization potential (1st): 6.108 eV
  • Electronic work function Φ: 3.84
  • Oxidation potentials: Tl → Tl+ + e = 0.3363, Tl+ → Tl3+ + 2e = -1.25 V
  • Chemical valence: 1 3
  • Electrochemical equivalents: 7.625 g/amp-hr
  • lonic radius: 1.5 angstrom
  • Valence electron potential: 9.6 -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 4f14 5s2 5p6 5d10 6s2 6p1
  • Valence electrons: 6s2 6p1
  • Crystal form: HCP
  • Half life:
  • Cross section σ: 3.4 ± 0.5 barns
  • Vapor pressure: 5.33E-06 Pa (at melting point)