Scanning Microscopy


Calcium oxalate monohydrate (COM), calcium oxalate dihydrate (COD) and calcium oxalate trihydrate (COT) were grown from solutions under controlled release of the reacting ions. The mass transfer kinetics of ions released from an insoluble polyethylene matrix, from an osmotic pump system and from the hydrolysis of diethyl oxalate were studied under different experimental conditions. It was possible with simple laboratory techniques to grow well-formed crystals of COM, COD and COT, suitable for single crystal work. Results obtained show that the degree of hydration, size, and morphology of the crystals formed, are controlled by interfacial kinetic factors.

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