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Table 1 EPMA microanalysis data performed on several areas of the green tesserae sample

From: Novel characterization techniques for cultural heritage using a TEM orientation imaging in combination with 3D precession diffraction tomography: a case study of green and white ancient Roman glass tesserae

Green Diameter SiO2 Al2O3 K2O CaO SnO2 Na2O MgO TiO2 MnO FeO CoO CuO SO3 PbO Cl Sb2O5 Total
1 > 1 μm 42.93 1.16 0.29 4.24 23.54 3.91 0.31 0.04 0.26 0.68 0.00 2.00 0.29 8.63 1.12 0.00 89.40
2 > 1 μm 41.03 1.24 0.27 4.70 13.11 8.86 0.28 0.00 0.24 0.60 0.00 2.08 0.20 22.86 1.04 5.77 102.28
3 > 1 μm 38.97 1.12 0.34 4.72 9.32 4.80 0.28 0.05 0.25 0.62 0.07 1.85 0.23 18.58 1.05 6.32 88.56
4 < 1 μm 57.09 1.81 0.48 5.61 0.32 5.86 0.54 0.08 0.39 0.70 0.10 2.67 0.26 10.06 1.66 1.38 89.01
5 < 1 μm 57.91 1.83 0.52 5.61 0.27 5.39 0.52 0.06 0.37 0.66 0.00 2.66 0.29 9.18 1.64 1.19 88.09
6 Glass 59.59 1.90 0.60 5.94 0.26 6.66 0.58 0.07 0.37 0.69 0.00 2.73 0.26 9.41 1.67 0.87 91.60
7 Glass 59.58 1.86 0.63 5.88 0.25 6.59 0.60 0.07 0.38 0.68 0.00 2.87 0.24 9.42 1.66 0.89 91.61
8 Glass 59.38 1.91 0.58 5.91 0.22 6.63 0.58 0.04 0.40 0.66 0.00 2.83 0.26 9.29 1.65 0.81 91.14
9 Glass 59.32 1.92 0.58 5.97 0.24 6.39 0.56 0.10 0.37 0.68 0.02 2.75 0.22 9.65 1.66 0.89 91.32
10 Glass 59.56 1.91 0.57 5.94 0.23 6.65 0.63 0.06 0.39 0.67 0.09 2.78 0.24 9.59 1.65 0.85 91.80
Average pigment comp. 47.59 1.43 0.38 4.98 9.31 5.76 0.39 0.05 0.30 0.65 0.03 2.25 0.25 13.86 1.30 2.93 91.47
Average glaze comp. 59.49 1.90 0.59 5.93 0.24 6.58 0.59 0.07 0.38 0.68 0.02 2.79 0.25 9.47 1.66 0.86 91.49
  1. Elemental composition obtained by means of EPMA in wt% on green tesserae. Typical analyzed areas are shown in Additional file 1: Fig. S4