This is a really basic qn. for Oxide crystal growers... How do we decide when to use Al crucibles sealed in Quartz or Pt crucibles? Si obviously attacks quartz - but how about the the other oxides we've grown, why do we use Pt?
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i'm not sure why we use platinum, but at least part of it is that some growths will get stuck in the porous alumina, but not in platinum
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