Improvement of quality of hydrothermally grown calcite single crystals

摘要

The effects of growth factors (nutrient and mineralizer) on the perfection of calcite single crystals grown under hydrothermal conditions in an organic salt solution were investigated. The increase of carbon number in alkyl group of the ammonium monocarboxylates as a mineralizer solution, showed a general trend of decreasing the growth rate. When Iceland spar was used as the nutrient instead of natural limestone, the dislocation density remarkably decreased. It was shown that Mg~2+ and Mn~2+ ions in the nutrient caused the increase in the dislocation density in the grown Calcite crystals.