Calcite–aragonite transformation in an eggshell: a crucial role of organics and assessment of the impact of milling conditions on its extent using Taguchi design

Kairat Kenges, Stephanos Karafiludis, Róbert Džunda, Imelda Octa Tampubolon, Bagdat Satybaldiyev, Franziska Emmerling, Matěj Baláž

2024

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DOI 10.1039/d4cp02354d

Data confidence 70 medium

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Abstract

orthogonal array. The optimized parameters encompassed milling time, sample mass, milling speed and duration of breaks and it was shown that sample mass has a decisive effect on the amount of obtained aragonite. Under the most efficient conditions, 73.7% of aragonite was obtained. Prolonging milling until 4 hours further boosts the transformation, reaching 89.9% of aragonite, but further milling leads to the collapse of the aragonite structure and pure calcite was observed after 5 hours.