I wish you would publish this - perhaps a note in Corrosion Science or some other suitable journal (even Am Min?). Too many observatrions of unusual corrosion products are left unpublished or exist only in conference notes!
>>> "David Scott" <[log in to unmask]> 05/19 4:41 PM >>>
we have found zinc-containing copper sulphates (essentially a zinc-substituted brochantite) called nauwamite, on clocks from the Wallace collection which are of interest in the zinc-containing salts ( of which there are quite a number) ....we could look at the XRD for you if you have a pinhead or smaller sample by powder diffraction Debye-Scherrer......
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