Synthesis and Characterization of Ti⁴⁺ Containing Carbonates Ti[CO₄] and Ti₂O₃[CO₃].

ABSTRACT: Two titanium carbonates, Ti[CO₄] and Ti₂O₃[CO₃], were synthesized by the reaction of TiO₂ with CO₂ at high pressures and temperatures in a laser heated diamond anvil cell. Their structures were solved by in situ single crystal X-ray diffraction at high pressures. At pressures above ≈33 GPa, Ti[CO₄]-I4¯2d is stable. It transforms to Ti[CO₄]-I4₁/amd on pressure release. The distinguishing feature of the Ti[CO₄]-structures is the presence of isolated [CO₄]^4--groups, while Ti₂O₃[CO₃] has isolated [CO₃]^2--groups. Both structures contain 8-fold coordinated tetravalent Ti⁴⁺-cations. Full geometr

SUBMITTER: Bayarjargal L 

PROVIDER: S-EPMC12674196 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature