Pseudo frank-kasper 21-vertex, Values of electronic energy gap

• Ni-Si-U
• Ce-Ni-P
• Al-Er-Ge
• Al-Au-Si-Th
• Ag-Al-Ba
• ternary
• transitional
• rare earth
• lanthanoid
• orthorhombic
• tetragonal
• monoclinic
• hexagonal
• trigonal