Thenature of marbled Terra Sigillata slips [electronic resource] : a combined mu XRF and mu XRD investigation.

X-ray Microdiffraction Roman Pottery X-ray Fluorescence.

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Bibliographic Details
Online Access: Online Access
Corporate Author: Lawrence Berkeley National Laboratory (Researcher)
Format: Government Document Electronic eBook
Language:English
Published: Berkeley, Calif. : Oak Ridge, Tenn. : Lawrence Berkeley National Laboratory ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2009.
Subjects:

MARC

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245 0 0 |a Thenature of marbled Terra Sigillata slips  |h [electronic resource] :  |b a combined mu XRF and mu XRD investigation. 
260 |a Berkeley, Calif. :  |b Lawrence Berkeley National Laboratory ;  |a Oak Ridge, Tenn. :  |b distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,  |c 2009. 
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500 |a 01/31/2009. 
500 |a "lbnl-1789e" 
500 |a Applied Physics A FT. 
500 |a Tamura, Nobumichi; Goudeau, Philippe; Mehta, Apurva; Sciau, Philippe; Leon, Yoanna; Webb, Sam. 
500 |a Advanced Light Source Division. 
520 3 |a In addition to the red terra sigillata production, the largest Gallic workshop (La Graufesenque) made a special type of terra sigillata, called 'marbled' by the archaeologists. Produced exclusively on this site, this pottery is characterized by a surface finish made of a mixture of yellow and red slips. Because the two slips are intimately mixed, it is difficult to obtain the precise composition of one of the two constituents without contamination by the other. In order to obtain very precise correlation at the appropriate scale between the color aspect and the element and mineralogical phase distributions in the slip, combined electron microprobe, x-ray micro spectroscopies and micro diffraction on cross sectional samples were performed. The aim is to discover how potters were able to produce this unique type of terra sigillata and especially this slip showing an intense yellow color. Results show that the yellow component of marbled sigillata was made from a titanium-rich clay preparation. The color is related to the formation of a pseudobrookite (TiFe2O5) phase in the yellow part of the slip, the main characteristics of that structure being considered nowadays as essential for the fabrication of stable yellow ceramic pigments. Its physical properties such as high refractive indices and a melting point higher than that of most silicates widely used as ceramic colorants are indeed determinant for this kind of applications. Finally, the red parts have a similar composition (elementary and mineralogical) to the one of standard red slip. 
520 0 |a X-ray Microdiffraction Roman Pottery X-ray Fluorescence. 
536 |b DE-AC02-05CH11231. 
650 7 |a X-ray Diffraction.  |2 local. 
650 7 |a Ceramics.  |2 local. 
650 7 |a Diffraction.  |2 local. 
650 7 |a Fabrication.  |2 local. 
650 7 |a Melting Points.  |2 local. 
650 7 |a Contamination.  |2 local. 
650 7 |a Production.  |2 local. 
650 7 |a Physical Properties.  |2 local. 
650 7 |a Mixtures.  |2 local. 
650 7 |a Silicates.  |2 local. 
650 7 |a Slip.  |2 local. 
650 7 |a Pigments.  |2 local. 
650 7 |a Clays.  |2 local. 
650 7 |a Color.  |2 local. 
650 7 |a Electrons.  |2 local. 
710 2 |a Lawrence Berkeley National Laboratory.  |4 res. 
710 1 |a United States.  |b Department of Energy.  |b Office of Scientific and Technical Information.  |4 dst. 
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