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GROWTH-KINETICS AND MORPHOLOGY OF POTASSIUM DIHYDROGEN PHOSPHATE CRYSTAL FACES IN SOLUTIONS OF VARYING ACIDITYстатья
Информация о цитировании статьи получена из
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Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: RASHKOVICH LN, MOLDAZHANOVA GT
- Журнал: Journal of Crystal Growth
- Том: 151
- Номер: 1-2
- Год издания: 1995
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 145
- Последняя страница: 152
- DOI: 10.1016/0022-0248(94)00870-1
- Аннотация: Changes in the solution acidity do not influence the growth rate of bipyramidal faces, however, within the limits of 20% it can be changed by uncontrollable impurities existing in the solution. For steps on prismatic faces in acid and alkali solutions a decrease of the critical supersaturation sigma*, at which a sharp increase of the velocity occurs, is observed. This is indicative of the decrease of the surface concentration of the adsorbed impurity, which retards the growth. The more the solution composition deviates from the stoichiometric one, the more does the value of sigma* diminish. It is shown that pH does not affect the free surface energy of end faces of steps and their kinetic coefficients. The values of kinetic coefficients of steps of different orientation on prismatic and pyramidal faces are determined. The features of the macrosteps formation with the supersaturation increase are described in solutions of varying acidity. The effect of pH on the crystal habit is discussed.
- Добавил в систему: Рашкович Леонид Николаевич