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Manganese accommodation in fossilised mastodon ivory and heat-induced colour transformation; evidence by EXAFS
Ina Reiche, Guillaume Morin, Christian Brouder, Vicente Armando Sole, Pierre-Emmanuel Petit, Colette Vignaud, Thomas Calligaro and Michel Menu
Manganese accommodation in fossilised mastodon ivory and heat-induced colour transformation; evidence by EXAFS (in 4th European conference on Mineralogy and spectroscopy, Georges Calas (president))
European Journal of Mineralogy (December 2002) 14 (6): 1069-1073
Manganese accommodation in fossilised mastodon ivory and heat-induced colour transformation; evidence by EXAFS (in 4th European conference on Mineralogy and spectroscopy, Georges Calas (president))
European Journal of Mineralogy (December 2002) 14 (6): 1069-1073
Index Terms/Descriptors
Abstract
Odontolite or bone turquoise, a turquoise-blue heated fossilized mastodon ivory or bone, is an imitation of natural gem turquoise. Its colour can be ascribed to Mn (super 5+) traces (Mn 220-650 ppm) in a tetrahedral environment of four O atoms in an apatite matrix. The structural environment of the Mn was investigated by extended X-ray absorption fine structure (EXAFS) which confirmed the presence of Mn (super 2+) , Mn (super 3+) or Mn (super 4+) before, and Mn (super 5+) after thermal treatment of fossilized ivory. The location of Mn (super 5+) partially substituting for P in the apatite structure was confirmed.
ISSN: 0935-1221
EISSN: 1617-4011
Serial Title: European Journal of Mineralogy
Serial Volume: 14
Serial Issue: 6
Title: Manganese accommodation in fossilised mastodon ivory and heat-induced colour transformation; evidence by EXAFS
Title: 4th European conference on Mineralogy and spectroscopy
Author(s): Reiche, InaMorin, GuillaumeBrouder, ChristianSole, Vicente ArmandoPetit, Pierre-EmmanuelVignaud, ColetteCalligaro, ThomasMenu, Michel
Author(s): Calas, Georgespresident
Affiliation: Centre de Recherche et de Restauration des Musees de France,
Paris,
France
Affiliation: CNRS, Laboratoire de Mineralogie-Cristallographie de Paris,
Paris,
France
Pages: 1069-1073
Published: 200212
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller),
Stuttgart,
Federal Republic of Germany
Meeting name: 4th European conference on Mineralogy and spectroscopy (ECMS4)
Meeting location: Paris,
FRA,
France
Meeting date: 20010910Sept. 10-14, 2001
References: 13
Accession Number: 2003-006876
Categories: Mineralogy of non-silicates
Document Type: Serial Conference document
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table
Secondary Affiliation: Universites de Paris VI et VII,
FRA,
FranceEuropean Synchrotron Radiation Facility,
FRA,
France
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 200302
