Fig. 1. Phase transition behaviour of M⁺·(1)·X⁻ salts and the formation of the Col_h phase. (a) DSC profiles of K⁺·(1)·SCN⁻ (red) and K⁺·(1)·I⁻ (blue). (b) Temperature ranges of the solid phase (red) and Col_h phase (blue). POM images of the Col_h phase of (c) K⁺·(1)·I⁻ at 483 K and (d) K⁺·(1)·SCN⁻ at 473 K.