Fig. 1: Design of supersalts PnH4MX4.
From: A family of ionic supersalts with covalent-like directionality and unconventional multiferroicity
a Structures of ZB, dZB, RS, and CsCl phase, where dark green and yellow spheres, respectively, denote cations and anions. b Non-centro-symmetric superalkali and superhalogen compared with isotropic isolated atoms. c Several typical structures of supersalts PnH4MX4, which may be synthesized by reactions MPn+4HX → PnH4MX4 or PnH4X + MX3 → PnH4MX4. White, pink, blue, purple, and light green spheres denote H, B, N, P and halogen atoms, respectively.
