Hi Walter
I'm surprised this question hasn't come up more often. Its a common problem in paleo and archaeo dig sites and of course, they will most often have some undergrad attack it with dental picks and such so as to not loose any of the specimen, but other methods are usable for calcium carbonates, depending on your desire to attack it. Acetic acid would be one option, and although water is the solvent which put it there in the first place, its often slow.
There are better acids for such, and I believe I heard someone say they used one of those products you mentioned like lime away or clr. But on any of these chemical removals, it sure wouldn't want to be done on something to be studied as there surely will be some interaction with the specimen.
Mark
----- Original Message ----- From: "Walter Branch" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, December 02, 2004 11:11 AM
Subject: [meteorite-list] Caliche
Hello Everyone,
Speaking of Caliche...
Does the Caliche (form of calcium carbonate) that we sometimes see on desert
meteorites replace the fusion crust that is present or does it form a layer
over the crust?
-Walter
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