On the Chemical Signature and Origin of Dicoppertrihydroxyformate (Cu2(OH)3HCOO) Formed on Copper Miniatures of 17th and 18th centuries release_ajd34fb2wfdp5agbtbt5wx4sgy

by Alfredina Veiga, Dora Martins Teixeira, António J. Candeias, José Mirão, Paulo Simões Rodrigues, Jorge Ginja Teixeira

Published in Microscopy and Microanalysis by Cambridge University Press (CUP).

2016   Volume 22, Issue 05, p1007-1017


<jats:title>Abstract</jats:title> A corrosion product rarely reported in the literature has been found on the copper support of three miniature paintings of the 17th and 18th centuries. This product, which has been identified as dicoppertrihydroxyformate (Cu<jats:sub>2</jats:sub>(OH)<jats:sub>3</jats:sub>HCOO), is an unusual basic copper formate found on copper artifacts. The identification and characterization of dicoppertrihydroxyformate was carried out directly over the corroded surface of the objects, using a nondestructive approach, which combines the integrated use of various microanalytical techniques. Using this approach, it was possible to obtain a set of new reference data about the natural form of Cu<jats:sub>2</jats:sub>(OH)<jats:sub>3</jats:sub>HCOO, that will enable its unambiguous identification in other similar objects. In this work, the probable causes that may have contributed to its formation are also discussed.
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Date   2016-09-13
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