Experimental Observation of a Calcium Silicon Double Carbonate.

ABSTRACT: Reactions between carbon dioxide (CO₂) and silica (SiO₂), as well as between carbonates and silicates, are central to understanding carbon behavior in planetary interiors and have important technological implications. Yet, only a few oxides are known in which carbon and silicon coexist within the same crystal lattice. These silicate-carbonates typically contain trigonal carbonate [CO₃] groups and tetrahedrally coordinated silicate [SiO₄] units. In the CaO-SiO₂-CO₂ system, no phase had previously been shown to contain both octahedrally coordinated silicon [SiO₆] and carbonate [CO₃] groups, nor had such a structure been theoretically predicted. Here, we report the synthesis of the calcium silicon double c

SUBMITTER: Botan-Neto BD 

PROVIDER: S-EPMC12929942 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature