Atomic force microscopy of growth and dissolution of calcium oxalate monohydrate (COM) crystals
2003; Elsevier BV; Volume: 261; Issue: 4 Linguagem: Inglês
10.1016/j.jcrysgro.2003.09.026
ISSN1873-5002
AutoresN. V. Gvozdev, Е. В. Петрова, T. G. Chernevich, O. A. Shustin, L. N. Rashkovich,
Tópico(s)Iron oxide chemistry and applications
ResumoThe growth and dissolution of calcium oxalate monohydrate (COM) crystals up to 30 μm in length were investigated in situ by atomic force microscopy. The fast-growing faces grew by the dislocation mechanism, the slow-growing ones (in most cases), by forming 2D-nuclei. The velocity of moving steps at different supersaturations, the normal rates of growth and dissolution of these faces were measured. The dissolution rate was found to be 3 times higher in the specially prepared Aqua RX water than in distilled water. Adding a small amount of Al and Fe ions to the water resulted in 5-fold increase of the dissolution rate. Intensive dissolution was observed even when these ions were added to a supersaturated solution.
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