Elucidation of the Fe(III) Gallate Structure in Historical Iron Gall Ink
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Authors
Ponce, Also
Lynn B. Brostoff
Sarah K. Gibbons
Peter Zavalij
Carol Viragh
Hooper, Joseph
Sufian Alnemrat
Karen J. Gaskell
Bryan Eichhorn
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Advisors
Date of Issue
2016
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Abstract
Synthetic, structural, spectroscopic and aging studies conclusively show that the main colorant of historical iron gall ink (IGI) is an amorphous form of Fe(III) gallate· xH2O (x = ∼1.5−3.2). Comparisons between experimental samples and historical documents, including an 18th century hand-written manuscript by George Washington, by IR and Raman spectroscopy, XRD, X-ray photoelectron spectroscopy, and Mössbauer spectroscopy confirm the relationship between the model and authentic samples. These studies settle controversy in the cultural heritage field, where an alternative structure for Fe(III) gallate has been commonly cited.
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Description
The article of record as published may be found at http://dx.doi.org/10.1021/acs.analchem.6b00088
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Physics
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Funder
Library of Congress; Howard Hughes Medical Institute; University of Maryland
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Citation
Ponce, Aldo, et al. "Elucidation of the Fe (III) Gallate Structure in Historical Iron Gall Ink." Analytical chemistry 88.10 (2016): 5152-5158.
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.