Self similar attraction or quantum atmospheric effect

Several years ago I saw video/audio footage of a U.S. astronaut
conducting an experiment with what looked like a ziplock or plastic
pouch with several compounds/elements mixed in it. He was "shaking"
that pouch and watching how the individual compounds or elements
behaved. The components separated out of the mix and clustered to
their own kind. I think that was an experiment on a space shuttle
mission but could have been on the ISS. Does anyone else remember
that?

What I am trying to remember is the name of the astronaut, whether
it was on the space shuttle or early space station and the name or
description for the effect of like particles or elements mixed then
separating and becoming attracted to like particles or elements. The
experiment that astronaut performed on video showed some weired
phenomena of self-similar attraction or self-similar cohesion and I
have been searching Google for that old video and experiment only to
not find it.... Even the principle is or seems difficult to find.

Can anyone reading this find that experiment where in zero "G," an
element of the same type settles with or moves toward it's own kind?

It is not a gravitational effect and may or may not be an elecrostatic
effect.... Is it a quantum atmospheric effect?