Diffusion in Molten Sodium Carbonate.

ABSTRACT: The diffusion of sodium and carbonate ions in molten sodium carbonate is investigated by quasi-elastic neutron scattering (QENS) at T = 1143 K. The quasi-elastic scattering at small wave vectors is dominated by diffusing sodium ions, and the derived self-diffusion coefficient of D_Na = 4.5 × 10^-5 cm²/s agrees well with previous tracer diffusion measurements. The quasi-elastic scattering from the carbonate anion is coherent, and the coherent scattering dominates the QENS signal at scattering vectors with a modulus greater than 1 Å^-1. The line width of the coherent scattering function is used to obtain the diffusion coefficient of the carbonate anion at this temperature of D_CO3^2- = 2.4 × 10^-

SUBMITTER: Wilding MC 

PROVIDER: S-EPMC11848922 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature