iandol on sun 28 sep 03
Dear Vince,
Absolutely correct, as I suggest in the second part of that paragraph.
When you think about it, because Sodium Ions have only one valency bond, =
they effectively lock the clay away from the water.
<<...With magnetism present the iron powder, which is not of itself =
magnetic, binds together as a solid aggregate. When the magnetism is =
removed, grains of iron powder do not attach themselves to their =
neighbours and are free to move independently...>>
Do you think that makes sense. ? The Magnet and pure iron powder seems a =
pretty good analogy for flocculated clay and it is one I have not read =
of in the past.
Best regards,
Ivor Lewis. Redhill, South Australia
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