15-vertex frank-kasper, Nonmetal, Temperature for structural transition

• Cl-Rb-Zn
• K-O-Se
• H-N-O-S
• Br-Rb-Zn
• Br-Cd-Cs
• nonmetal
• non-disordered
• alkali
• ferroelectric
• ternary
• orthorhombic
• monoclinic
• tetragonal
• cubic
• trigonal