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The presence of vaterite in bonding mortars of marble inlays from Florence Cathedral

Published online by Cambridge University Press:  05 July 2018

S. Signorelli
Affiliation:
Department of Earth Sciences, University of Florence, Via La Pira 4, 50121 Florence, Italy
C. Peroni
Affiliation:
Department of history of Architecture, Restoration and Conservation of Architectural Monuments, University “La Sapienza” Rome, P.za Borghese 9, 00186 Rome, Italy
M. Camaiti
Affiliation:
National Research Council - Centro di Studio sulle, Cause di Deperimento e sui Metodi di Conservazione delle Opere d'Arte - Florence, Via Degli Alfani 74, 50121 Florence, Italy
F. Fratini
Affiliation:
National Research Council - Centro di Studio sulle, Cause di Deperimento e sui Metodi di Conservazione delle Opere d'Arte - Florence, Via Degli Alfani 74, 50121 Florence, Italy

Extract

During the study of some decay processes in marble covering the façade of the Florence Cathedral (1870-1887), vaterite was found as the principal component of some bonding mortars of inlay decorations.

Vaterite is one of the three polymorphous phases of CaCO3 and crystallizes in the hexagonal system, dihexagonal bipyramidal class (Kamhi, 1963; Sato and Matsuda, 1969): it is unstable under normal environmental conditions (Deer et al., 1964).

Type
Short Communications
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1996

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