Ceramic vessel 26-2. Las Calañas.

Ceramic vessel 26-2 (Section F, second phase) of the Iberian agrarian factory od La Calañas (Marmolejo, Jaén, Spain). Oxidasing atmosphere. It is decorated with grey semicircles and a black line.
The black decoration was obtained with a manganese oxide: jacobsite (MnFe2O4). Jacobsite is the result of the transformation of pyrolusite (‎MnO2, the most common manganese ore) when firing temperature reaches 900ºC. EDXRF of black color indicates a high Mn concentration: 3,36% wt.
The Raman spectrum of the grey decoration was inconclusive. EDXRF of the grey color shows a enough concentration of Mn: 0.73% wt versus 0.06% wt in the ceramic paste.
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Dimensions

: 5 Centimeters

: 7.5 Centimeters

Materials

pottery

Temporal

: Orientalising, Iberians, Iberian

: Late 7th ct. BC-Early 6th ct. BC

Otros metadatos

Spatial

  • : Las Calañas
  • : Marmolejo, Jaén, Spain
  • : WGS84
 

Copyrights

Creative Commons - Attribution, Non-Commercial, No Derivatives (BY-NC-ND)

References

Tuñón, J.A., Sánchez, A., Parras, D.J., Vandenabeele, P. and Montejo, M. (2016): Micro-Raman spectroscopy on Iberian archaeological material”. Journal of Raman Spectroscopy. DOI 10.1002/jrs.4934

Molinos, M., Rísquez, C., Serrano, J L. y Montilla, S. (1994): Un problema de fronteras en la periferia de Tartessos: Las Calañas de Marmolejo. Jaén: Universidad de Jaén.

Digital Resources

Activities

  • Archaeometric analysis
  • Physical-chemical analysis
  • Ceramic. Analysis of decoration.

University Research Center for Iberian Archaeology

Raman Microscopy

Mineral analysis of the black decoration.

Non destructive. Surface cleaning. Sample pretreatment is not required. Direct measurement.

Micro-Raman Spectroscopy (MRS)

Renishaw ‘in via’ Reflex Spectrometer coupled with a confocal Leica DM LM microscope (CICT, University of Jaén), equipped with a diode laser (785 nm, 300 mW), and a Peltier-cooled CCD detector, calibrated to the 520.5 cm-1 line of silicon.

X-Ray Fluorescence

Elemental analysis of the black and grey decoration

Non destructive. Surface cleaning. Sample pretreatment is not required. Direct measurement.

Energy dispersive X- ray fluorescence (EDXRF);

EDAX (model Eagle III) fluorescence spectrometer (CITI, University of Seville). This spectrometer is equipped with a microfocus X-ray tube with an Rh anode, a polycapillary lens for X-ray focussing, and an 80 mm2 energy dispersive Si-(Li) detector. The sample chamber incorporates an XYZ motorized stage for sample positioning. A high resolution microscope is used to position the sample on the desired distance from the polycapillary. To increase the sensitivity of the low Z elements, the sample chamber can be brought under vacuum. For the analysis of the samples, a spot size of 300 μm was chosen at an operating X-ray tube voltage of 40 kV. The tube current was adapted for each sample in order to optimise the detection of X-rays
 

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