8-equatorial capped pentagonal prism 18-vertex, Tetragonal, Valence or charge transfer

• F-S-Sm
• F-La-S
• As-Mg-Na
• Ba-Br-F
• As-Mn-Na
• effective charge
• average number of 4f electrons
• non-disordered
• ternary
• tripolyhedral
• halogen