Glass Polymorphism in Hyperquenched Aqueous LiCl Solutions.

ABSTRACT: We investigate the glass polymorphism of dilute LiCl-H₂O in the composition range of 0-5.8 mol % LiCl. The solutions are vitrified at ambient pressure (requires hyperquenching with ∼10⁶ K s^-1) and transformed to their high-density state using a special high-pressure annealing protocol. Ex situ characterization was performed via isobaric heating experiments using X-ray diffraction and differential scanning calorimetry. We observe signatures from a distinct high-density and a distinct low-density glass for all solutions with a mole fraction x_LiCl of ≤ 4.3 mol %, where the most notable are (i) the jumplike polyamorphic transition from high-density to low-density glass and (ii) two well-separated glass-to-liquid transitions T_g,1

SUBMITTER: Giebelmann J 

PROVIDER: S-EPMC10123659 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature