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talc, pyrophillite

Talc is one of the more useful sheet silicates.  It's used as talcum powder, in ceramics and for insulation.  Soapstone and steatite are impure talc formations used as sinks and countertops in chemical labs.  They are acid resistant.

Pyrophillite is almost identical to talc and looks quite a bit the same.  It is more rare but has the same uses as talc.  Pyrophillite has a structural relationship to mica.  Both talc and pyrophillite are common in metamorphic areas such as New England.

I spent the past two or three days working on the computer and watching TV, MLK observances, the inauguration, and so on.  



Posted by oh5/ojhoff at 1:27 PM CST
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