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

L.T. Gibson, B.G. Cooksay, D. Littlejohn, N.H. Tennent, K. Linnow, M. Steiger

Research output: Contribution to journalArticle

9 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)1-10
Number of pages9
JournalStudies in Conservation
Volume50
Issue number4
Publication statusPublished - 2005

Fingerprint

Calcium
Acetic Acid
Artifact
Nitrate
Vapor
Salt Production
Salt
Moisture
Limestone
Pottery
Phase Diagram

Keywords

  • thecotrichite
  • efflorescence
  • chloride
  • nitrate

Cite this

Gibson, L.T. ; Cooksay, B.G. ; Littlejohn, D. ; Tennent, N.H. ; Linnow, K. ; Steiger, M. / The mode of formation of thecotrichite, a widespread calcium acetate chloride nitrate efflorescence. In: Studies in Conservation. 2005 ; Vol. 50, No. 4. pp. 1-10.
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The mode of formation of thecotrichite, a widespread calcium acetate chloride nitrate efflorescence. / Gibson, L.T.; Cooksay, B.G.; Littlejohn, D.; Tennent, N.H.; Linnow, K.; Steiger, M.

In: Studies in Conservation, Vol. 50, No. 4, 2005, p. 1-10.

Research output: Contribution to journalArticle

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T1 - The mode of formation of thecotrichite, a widespread calcium acetate chloride nitrate efflorescence

AU - Gibson, L.T.

AU - Cooksay, B.G.

AU - Littlejohn, D.

AU - Tennent, N.H.

AU - Linnow, K.

AU - Steiger, M.

PY - 2005

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AB - 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.

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KW - efflorescence

KW - chloride

KW - nitrate

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JF - Studies in Conservation

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