Investigation of the composition of a unique efflorescence on calcareous museum artifacts

✍ Scribed by L.T. Gibson; B.G. Cooksey; D. Littlejohn; N.H. Tennent

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 887 KB
• Volume: 337
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/s0003-2670(96)00429-1

✦ Synopsis

Fihrous crystals, consisting principally of calcium, acetate, chloride and nitrate ions on a numher ot' calcareous museum artifacts worldwide, have been examined. Ion chromatography (IC) was used to determine the exact composition of the efflorescence and nuclear magnetic resonance spectrometry (NMR) was used to determine the degree of hydration associated with the salt. Of the twelve samples analysed. eleven salts had the same stoichiometry as Efflorescence X. a novel salt identtfied from an Egyptian limestone relief sculpture in the Burrell Collection. Glasgow, that has the composition Ca,(CHiC00)3 Cl(N0&7H20.