SEARCH

SEARCH BY CITATION

Keywords:

  • clusters;
  • gallium compounds;
  • nitrogen compounds;
  • solid-state structures
Thumbnail image of graphical abstract

[Ga5]7− trigonal bipyramids and (M6N)9+ octahedra are present in the crystal structures of the isotypic title compounds. The charge in these phases is balanced by two electrons in metallic states: {(M6N)9+[Ga5]7− · 2e}. This simple model of the chemical bonding is supported by band structure calculations. A section of the hexagonal crystal structure together with a pseudo-cubic unit cell is shown on the right.