Picture of two heads

Open Access research that challenges the mind...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including those from the School of Psychological Sciences & Health - but also papers by researchers based within the Faculties of Science, Engineering, Humanities & Social Sciences, and from the Strathclyde Business School.

Discover more...

The mode of formation of thecotrichite, a widespread calcium acetate chloride nitrate efflorescence

Gibson, L.T. and Cooksay, B.G. and Littlejohn, D. and Tennent, N.H. and Linnow, K. and Steiger, M. (2005) The mode of formation of thecotrichite, a widespread calcium acetate chloride nitrate efflorescence. Studies in Conservation, 50 (4). pp. 1-10. ISSN 0039-3630

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

The widespread occurrence of thecotrichite, Ca3(CH3COO) 3Cl(NO3)2·7H2O, in the museum environment is explained theoretically by construction and examination of its phase diagram. Thecotrichite formation was simulated in the laboratory to identify the key factors involved in its production. This efflorescence occurs on porous limestone or calcareous artefacts such as pottery, stored in wooden cabinets that generate acetic acid vapour. Salt production depends on the moisture content of the object and the concentration of acetic acid in its surroundings. Furthermore, for thecotrichite to form the artefact must contain soluble chloride and nitrate salts.