Table 2. List of Ferroelectric (FE) and Antiferroelectric (AFE) RP Phases.
| compound | ordering, transition temperature (K) | symmetry change | Reference |
|---|---|---|---|
| BA2MAPb2Br7 | FE, 352 | Cmc21 → Cmca | (300) |
| BA2MA2Pb3Br10 | FE, 315 | Cmc21 → Cmca | (303) |
| BA2FAPb2Br7 | FE, 322 | Cmc21 → Cmcm | (301) |
| BA2FAPb2I7 | FE, 304 | Fmm2 → I4/mmm | (314) |
| BA2CsPb2Br7 | FE, 412 | Cmc21 → Cmca | (331) |
| BA2EA2Pb3Br10 | FE, 380 | Cmc21 → I4/mmm | (305) |
| BA2EA2Pb3I10 | AFE, 363; FE, 322 | Cmc21 → Pbca → I4/mmm | (133), (134) |
| i-BA2CsPb2Br7 | AFE, 353 | Pmnb → Cmca | (304) |
| i-BA2EAPb2Br7 | FE, 326 | Cc → I4/mmm | (313) |
| i-BA2EA2Pb3Br10 | FE, 370 | Cmc21 → I4/mmm | (313) |
| i-BA2FAPb2Br7 | AFE, 303.2 | Pnma → I4/mmm | (315) |
| i-BA2MAPb2Cl7 | FE, 316 | Fmm2 → I4/mmm | (320) |
| EA4Pb3Cl10 | FE, 415 | Cmc21 → I4/mmm | (310) |
| EA4Pb3Br10 | FE, 384 | C2cb → I4/mmm | (306) |
| EA2MA2Pb3Br10 | FE, 375 | Cmc21 → I4/mmm | (311) |
| EA2MA2Pb3Cl10 | FE, 390 | Cmc21 → I4/mmm | (321) |
| AM2CsPb2Br7 | FE, 313 and 349 | F222 → Cmc21 → I4/mmm | (322) |
| AM2EA2Pb3I10 | FE, 361 and 398 | Pmc21 → Cmce → I4/mmm | (330) |
| i-AM2CsPb2Br7 | FE, 323 and 349 | Cmc21 → Pbcm → I4/mmm | (329) |
| i-AM2Cs3Pb4Br13 | FE, 351 and 365 | Cmc21 → I4/m → I4/mmm | (326) |
| i-AM2EA2Pb3Br10 | FE, 371 | Cmc21 → I4/mmm | (307) |
| i-AM2EA2Pb3Cl10 | FE, 392 | Fmm2 → I4/mmm | (324) |
| -AM2EA2Pb3I10 | FE, 313; AFE, 340 | Cmc21 → Pmcn → I4/mmm | (309) |
| i-AM2MA2Pb3Br10 | FE, 305 | Cmc21 → I4/mmm | (323) |
| i-AM2MA2Pb3Cl10 | FE, 343 K | Pmc21 → I4/mmm | (325) |
| PA2FAPb2Br7 | FE, 263.3 | Cmc21 → Cmcm | (130) |
| BPA2FAPb2Br7 | FE, 348.5 | Cmc21 → Cmcm | (130) |
| CPA2FAPb2Br7 | FE, 335 K | Cmc21 → Fmmm | (328) |
| t-ACH2EA2Pb3Br10 | FE, 355 and 380 | Pm → Pmmn → Pmmn | (308) |
| AA2EA2Pb3Br10 | FE, 378 | Cmc21 → I4/mmm | (312) |
| C62Pb2Br7 | FE, 248, 306 | ? → Cc → C2/c | (316) |
| C72Pb2Br7 | FE, 260 | ? → Cc | (316) |
| C72Pb2Br7 | FE, 261, 275 | ? → ? → Cc | (316) |