## Gadolinium |

Symbol | Gd |
---|---|

Latin name | Gadolinium |

Atomic number | 64 |

Period | 6 |

Element category | Inner transition elements |

Relative atomic mass | 157.25 |

Group | III.B |

Electronegativity | 1.1 |

Oxidation numbers | 3 |

Electron configuration | 1s ^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 3d^{10} 4s^{2} 4p^{6} 4d^{10} 5s^{2} 5p^{6} 4f^{7} 5d^{1} 6s^{2} |

Density [g/cm^{3}] | 7.9 |

State | Solid |

Melting point [°C] | 1311 |

Boiling point [°C] | 3266 |

Atomic radius [pm] | 233 |

Covalent radius [pm] | 196 |

Thermal conductivity [W m^{-1}K^{-1}] | 10.6 |

Heat capacity [J K^{-1}g^{-1}] | 0.236 |

Discovery | 1880 |

Vickers hardness [MPa] | 570 |

Brinell hardness [MPa] | 180 |

Young's modulus [GPa] | 55 |

Electrical conductivity [S m^{-1}] | 7.7 · 10 ^{5} |

Shear modulus [GPa] | 22 |

1.st ionization energy [eV] | 6.15 |

2.nd ionization energy [eV] | 12.095 |

3.rd ionization energy [eV] | 20.635 |

Stable isotopes | 7 |

Unstable isotopes | 11 |