Investigating vaterite phase stabilisation by a tetrazole molecule during calcium carbonate crystallisation

Abstract

a b s t r a c tTetrazole compounds have recently been found to impact on crystal morphology but in a manner different from that of carboxylate molecules. One such molecule was found to stabilise vaterite and this was investigated by assessing the impact of systematic changes on its structure. It was found that both the tetrazole and the formyl functionalities were required for vaterite stabilisation. The mechanism of stabilisation appears to be via inhibition of vaterite dissolution.

Synthesis Methods and Favorable Conditions for Spherical Vaterite Precipitation: A Review

“…The stabilizing effect of oleic acid molecules was also demonstrated and the adsorption of oleic acid at the vaterite surface was confirmed by FTIR analysis [83]. Also, tetrazole [61] and fulvic acid [34] were identified as compounds that were able to absorb at the vaterite surface and retard vaterite dissolution. The stabilization of vaterite particles was also observed when polypeptides [33], bovine serum albumin, or soluble starch [87] was added into the reaction mixture.…”

“…Calcium carbonate in vaterite form can be produced by a diffusion method, in which ammonium carbonate [52] or ammonium bicarbonate [61] is used. These compounds slowly decompose the formed ammonia gas and carbon dioxide.…”

Optically Controlled Dissolution Kinetics of Vaterite Microcapsules: Toward Novel Crystal Growth Strategies

“…The vaterite spherulites dissolution kinetics in different liquid environments is crucially important for morphology investigations, phase stabilization, and controlled drug release . More generally, the nano/microparticle dissolution rate is a key characteristic for developing pharmaceutical and agricultural products, and it takes a central place in various biodurability tests .…”