Figure 6 | Scientific Reports

Figure 6

From: Pyrometamorphic process of ceramic composite materials in pottery production in the Bronze/Iron Age of the Northern Caucasus (Russia)

Figure 6

Example of comparison between XRD and FT-IR according to firing conditions: (a) three ceramic sherds from Ransyrt 1 fired in the oxidizing atmosphere with the estimated firing temperature of 300–675 °C (blue), 675–750 °C (orange), 1050–1300 °C (light grey); (b) three ceramic sherds fired at over 1050 °C (estimation) in Ca-rich matrix/reducing atmosphere (dark yellow), Ca-poor matrix/oxidizing atmosphere (dark grey); Ca-rich/oxidizing atmosphere (yellow).

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