Table 2: Observed FT-IR absorption frequencies (cm-1) and relative intensities of ancient archaeological pottery fragments.
FT-IR absorption bands in wave numbers (cm-1) with relative intensities | Tentative vibrational assignments | ||||||
SH-01 | SH-02 | SH-03 | KDR-01 | UMR-01 | UMR-02 | UMR-03 | |
3620 VW | 3618 VW | OH Stretching, Crystalline hydroxyl | |||||
3446 M | 3450 M | 3433 S | 3415 VS | 3436 M | 3411 M | 3402 W | O-H str. of adsorbed water |
1645 W | 1641 W | 1631 W | 1629 VW | 1633 M | 1647 W | 1627 VW | Bending of water |
1465 VW | H-O-H stretching of adsorbed water | ||||||
1041 VS | 1041 VS | 1081 VS | 1080 VS | 1018 VS | 1033 VS | 1035 VS | Si-O Str. of clay minerals |
786 M | 788 M | 779 W | 777 W | 775 W | 777 VW | 781 VW | Si-O str. of clay minerals |
797 | 796 VW | Si-O of quartz | |||||
727 W | 727 VW | C-O str. Calcite | |||||
686 VW | 688 VW | 694 VW | 694 VW | 692 VW | 696 VW | Si-O bending of quartz | |
642 VW | 646 VW | Al-O-Si str. of feldspar | |||||
538 W | 518 VW | 538 VW | Fe-O bend of Hematite | ||||
470 S | 451 M | 451 M | 457 W | 468 VW | 460 W | 468 W | Si-O-Si bending of silicates |
VS: Very strong; S: Strong; M: Medium; W: Week; VW: Very week.