Synthesis and characterization of crystalline polymeric carbonic acid (H2CO3) with sp3-hybridized carbon at elevated pressures. - Spahr, Dominik; Bayarjargal, Lkhamsuren; Brüning, Lukas; Kovalev, Valentin; Wedek, Lena M.; Bykov, Maxim; Milman, Victor; Giordano, Nico; Winkler, Björn; Bykova, Elena (Communications Chemistry, 2025)