Crystal structure predictions have proposed the existence of polymeric H2CO3, but its high-pressure polymorphism has yet to be confirmed experimentally. Here, the authors synthesized single crystals of polymeric H2CO3 in a diamond anvil cell and demonstrated that its structure consists of polymerized \({[{{\rm{CO}}}_{4}]}^{4-}\) tetrahedra forming chains along the c-axis.
- Dominik Spahr
- Lkhamsuren Bayarjargal
- Elena Bykova
