Microanalysis of clay-based pigments in paintings by XRD techniques

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388980%3A_____%2F16%3A00451135" target="_blank" >RIV/61388980:_____/16:00451135 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461446:_____/16:N0000005 RIV/60461446:_____/16:N0000008

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.microc.2015.10.032" target="_blank" >http://dx.doi.org/10.1016/j.microc.2015.10.032</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.microc.2015.10.032" target="_blank" >10.1016/j.microc.2015.10.032</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Microanalysis of clay-based pigments in paintings by XRD techniques

Popis výsledku v původním jazyce

Despite considerable advantages of the method in the field of microanalysis of pigments, powder X-ray micro-diffraction has not yet been satisfactorily tested for correct and unambiguous discrimination of clay structures in colour layers of paintings and, eventually, for reliable quantitative analysis of their relative contents. To overcome this lack of knowledge, several sets of laboratory experiments with model mixtures and reference samples imitating real paint layers have been performed and general rules for proper discrimination of clay structures have been described. As an integral part of the research, clay-binder interactions were studied to avoid misleading interpretations. It was found out that various characteristic shifts of basal diffraction lines depend on the type of organic binder and the relative content of expandable layers in the clay structure. Based on these results, it was possible to differentiate pure smectites, interstratified illite/smectite structures and chlorites in paint and preparatory layers of actual paintings. The accuracy of quantitative microanalysis of clay minerals in mixtures with other minerals in Mid-European red earth pigments (typically containing kaolinite, illite, quartz, hematite, and anatase) was characterised by total bias values in the range of 3-10 wt.%. Finally, results were applied to differentiation of earth pigments of various provenances in grounds of Baroque paintings and Early Renaissance preparation layers for gilding.

Název v anglickém jazyce

Microanalysis of clay-based pigments in paintings by XRD techniques

Popis výsledku anglicky

Despite considerable advantages of the method in the field of microanalysis of pigments, powder X-ray micro-diffraction has not yet been satisfactorily tested for correct and unambiguous discrimination of clay structures in colour layers of paintings and, eventually, for reliable quantitative analysis of their relative contents. To overcome this lack of knowledge, several sets of laboratory experiments with model mixtures and reference samples imitating real paint layers have been performed and general rules for proper discrimination of clay structures have been described. As an integral part of the research, clay-binder interactions were studied to avoid misleading interpretations. It was found out that various characteristic shifts of basal diffraction lines depend on the type of organic binder and the relative content of expandable layers in the clay structure. Based on these results, it was possible to differentiate pure smectites, interstratified illite/smectite structures and chlorites in paint and preparatory layers of actual paintings. The accuracy of quantitative microanalysis of clay minerals in mixtures with other minerals in Mid-European red earth pigments (typically containing kaolinite, illite, quartz, hematite, and anatase) was characterised by total bias values in the range of 3-10 wt.%. Finally, results were applied to differentiation of earth pigments of various provenances in grounds of Baroque paintings and Early Renaissance preparation layers for gilding.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DB - Geologie a mineralogie

OECD FORD obor

—

Projekt

<a href="/cs/project/GA14-22984S" target="_blank" >GA14-22984S: Mikroanalýza jílových minerálů ve výtvarném umění jako součást provenienčních studií</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Microchemical Journal

ISSN

0026-265X

e-ISSN

—

Svazek periodika

125

Číslo periodika v rámci svazku

MAR

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

10-20

Kód UT WoS článku

000369205900002

EID výsledku v databázi Scopus

2-s2.0-84946887915