Difference between revisions of "Posnjakite"
Jump to navigation
Jump to search
m (Text replace - "\[http:\/\/cameo\.mfa\.org\/materials\/fullrecord\.asp\?name=([^\s]+)\s(.*)\]" to "$2") |
|||
| Line 6: | Line 6: | ||
Posnnakit (Deut.) | Posnnakit (Deut.) | ||
| − | + | ==Physical and Chemical Properties== | |
{| class="wikitable" | {| class="wikitable" | ||
|- | |- | ||
| Line 16: | Line 16: | ||
|} | |} | ||
| − | == | + | ==Resources and Citations== |
| + | |||
| + | * M.Naumova, S.Pisareva,"A Note on the Use of Blue and Green Copper Compounds in Paintings" ''Studies in Conservation'' 39:277-283, 1994. | ||
| − | + | * L.Selwyn, N.Binnie, J.Poitras, M.Laver, D.Downham, "Outdoor Bronze Statues: Analysis of Metal and Surface Samples" ''Studies in Conservation'' 41:205-228, 1996. | |
[[Category:Materials database]] | [[Category:Materials database]] | ||
Revision as of 11:07, 20 August 2022
Description
A blue-green mineral that has been occasionally found as a pigment. Posnjakite occurs naturally in deposits of Malachite. Recipes for the synthetic preparation of posnjakite are given in a late 18th century paint manual (Naumova and Pisareva, 1994). Posnjakite has also been found as a Bronze corrosion product where it is thought to be a precursor to Brochantite formation (Selwyn, et al., 1996).
Synonyms and Related Terms
Posnnakit (Deut.)
Physical and Chemical Properties
| Composition | Cu4SO4(OH)5-H2O |
|---|---|
| Mohs Hardness | 2 - 3 |
Resources and Citations
- M.Naumova, S.Pisareva,"A Note on the Use of Blue and Green Copper Compounds in Paintings" Studies in Conservation 39:277-283, 1994.
- L.Selwyn, N.Binnie, J.Poitras, M.Laver, D.Downham, "Outdoor Bronze Statues: Analysis of Metal and Surface Samples" Studies in Conservation 41:205-228, 1996.