Calcite single crystals were successfully grown in newly discovered ammonium acetate solution, an organic salt solution, under mild hydrothermal conditions below 250°C at saturated vapor pressure. The growth rate increased with the increase in growth temperature, temperature difference, and concentration of ammonium acetate solution. Even in a dilute ammonium acetate solution of 0.07M with a pH of 7.0, the seed crystal grew at a growth rate of 57 μm/day at 235°C with a temperature difference of 15°C. The grown crystal under these conditions was optically transparent and not contaminated with the mineralizer. Ammonium acetate solution has a large difference as a mineralizer for crystal growth of calcite from other inorganic salt solutions; In ammonium acetate solution, new planes, the f and a planes, developed on the seed crystal bound by the r planes.
|Number of pages||10|
|Journal||Journal of Crystal Growth|
|Publication status||Published - 1996 Jun|
ASJC Scopus subject areas
- Condensed Matter Physics
- Inorganic Chemistry
- Materials Chemistry