hello everybody
i have a little problem
i would like to use a TEM (Transmission electronic microscopy) on a
crystal of calcite but my pattern are too large.
i must polish them but i have never do that and i didn't find a good
method for do it.
my crystal of calcite are pure, it's optical calcite quality oriented
on the face {10-14}.
I would like to known if someone had already do this and which
technique he used.
thanks a lot for some one who's help me to resolve this problem or
give some tricks.

TEM preparation of such a sample is difficult, as you need a very thin
sample (50 nm ot even thinner) to achieve electron transparency.

Best is to ask the specialists at the TEM lab which method they suggest, or
if they can do the preparation for you. Maybe FIB milling is necessary too
get a good sample.

Mechanical polishing won't do it in this case.

What do you exactly mean with pattern?

thank you for answering Mr Rutz
when I say pattern, on my point of vue, it's a crystal of calcite
(CaCO3) which the volume is about 1 mm3. And the calcite is not very
harsh (compared to metal) And my pattern is in a solution of Pb2+ and
i have a surface precipation of PbCO3; So with the TEM I would like to
go see at the interface, between the phase of PbCO3 and CaCO3.
for seeing that i have to make a "cross over" but my problem is
i have to polish my pattern but the risk is that i could remove the
precipitate of PbCO3 at the surface
I hope you will understood that i have writed
I think i have manage to polish my pattern of calcite i have alredy
test but now i have to see it under the TEM to see if that have done
had worked
thanks a lot for u'r answered
sincerly