P21cn

• Bi-Fe-K-O
• H-Li-N-O-S
• Al-Ca-H-O-Si
• Cl-K-Zn
• Bi-Br-Nb-O
• electronic and electrical properties
• temperature for structural transition
• phase transitions
• structural transitions
• magnetic properties
• ferroelectric
• nonmetal
• non-disordered
• chalcogen
• alkali
• orthorhombic