The origin of nuclei in precipitation reactions

✍ Scribed by Robert B. Fischer

• Publisher: Elsevier Science
• Year: 1960
• Tongue: English
• Weight: 778 KB
• Volume: 22
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/s0003-2670(00)88326-9

✦ Synopsis

CHRISTIANSEN AND NIELSEN~~~

and others+12 have determined the sizes of nuclei from the lengths of the induction periods and obtamcd, for example, tight ions for barium sulfate, six for silver chromate and nine for calcium fluoride. The experimental methods of measuring the lengths of the induction period may be open to question, but this factor likely would not alter the conclusions that (a) there is a definite critical size of nucleus for each substance, and (b) this critical size is of the order of only a few "molecules" or ion pairs. These two conclusions are contradictory to those of TUIZNUULL. These two kinetic approaches to nucleation have been reviewed and summarized by KLEIN AND GORDON 13. It should be emphasized that the TUI~NBULL Anal Clrrm Ada, 22 (IgGo) 501-508