Admixtures in Crystallization by Jaroslav Nyvlt, Joachim Ulrich

By Jaroslav Nyvlt, Joachim Ulrich

This specific publication is the main exhaustive and up to date remedy of the topic of admixtures in crystallization on hand this day. The creation, relatively appropriate for newbies but additionally invaluable for extra complex readers, discusses concisely present idea and adventure and gives approximately 250 references for extra examining. the most part presents a close survey of the consequences of over two hundred natural and inorganic admixtures at the crystallization of over three hundred natural and inorganic elements. the information, which has been accrued jointly from just about all the to be had papers, books and journals, are awarded in obtainable tables along the greater than 1600 correct literature references. Chemists and chemical engineers, no matter if in schooling, examine, or creation, are bound to locate this e-book an necessary reference paintings.

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The additive molecules are also modelled with these models. I n this way, we get a two-dimensional model of the upper layers of the crystal and a three-dimensional model of the additives. Assuming, that the growth of a face may be influenced by a n adsorbed additive, we try to find a well fitting position of the admixture on the surface. A well fitting position is characterized a s a position, where the additive has a s much ease to build attractive interactions to the surface a s possible. One possibility is to make these fits with a computer program.

Notations A surface area a lattice constant B constant C concentration D homogeneous distribution coefficient enthalpy of fusion enthalpy of mixing K recrystallization factor KB distribution coefficient k k-th stage k Planck constant homogeneous distribution coefficient growth rate of a face in presence of admixture growth rate of a face in absence of admixture growth rate of a face in full coverage by admixture mass of crystals n total number of stages n average density of the admlxture on a surface P concentration (wt.

V.. Lahav. M.. : Angew. Chem. , Dunnlng. : Acta Cryst. 15 (1962) 474 151 Bennema. : Progress in crystal growth from solutions: Implications for lndustrlal crystallization. in: IndusMal Crystallization ‘78(eds. de Jong. J.. ),p. 115. North-Holland, Amsterdam 1979 I61 Bennema. P.. ,in: Crystal Growth - anIntroductlon (ed. ), p. 263. : J. Crystal Growth 42 (1977) 201 I81 Berkovitch-Yellln. : J. Am. Chem. N.. Davey. : J. , Davey. J.. Halcrow. : J. Crystal Growth 79 (1-3, Pt. 21(1986) 765 [ 111 Blank.

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