Key points are not available for this paper at this time.
K. Trentelman, L. Stodulski, D. Scott, M. Back, S. Stock, D. Strahan, A. R. Drews, A. O'Neill, W. H. Weber, A. E. Chen, S. J. Garrett, The Characterization of a New Pale Blue Corrosion Product Found on Copper Alloy Artifacts, Studies in Conservation, Vol. 47, No. 4 (2002), pp. 217-227
Trentelman et al. (Tue,) studied this question.