The Effect of Oxygen on the Undercooling of Zone-Refined Tin

Abstract

~)Experiments are described to show that the. amount and distribution.of~has a marke.d influence on the undercooling of zone-refined~. l In);he absence~h~n oxide phase the tiR nll,cleates on graphite,~b.(:)n, and $!:J.4ea containers at an undercooling le&s-than(6°C. Since these materials. have different crystallog~~properties, their struct~properties are not im.R.l ortantin determining their catalytic potency.(2.)