Microscanning Xrf, Xanes, and Xrd Studies of the Decorated Surface of Roman Terra Sigillata Ceramics

  • Mirguet C
  • Sciaua P
  • P G
 et al. 
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Abstract

Different microscanning synchrotron techniques were used to better understand the elaboration process and origins of Terra Sigillata potteries from the Roman period. A mixture Gallic slip sample cross-section showing red and yellow colors was studied. The small (micron) size of the X-ray beam available at Stanford Synchrotron Radiation Laboratory (SSRL) and Advanced Light Source (ALS) synchrotron sources, coupled with the use of a sample scanning stage allowed us to spatially resolve the distribution of the constitutive mineral phases related to the chemical composition. Results show that red color is a result of iron-rich hematite crystals and the yellow part is a result of the presence of Ti-rich rutile-type phase (brookite). Volcanic-type clay is at the origin of these marble Terra Sigillata.

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Authors

  • C Mirguet

  • P Sciaua

  • Goudeau P

  • M Mehta

  • Pianetta P

  • Liu Z

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