Table 1 Experimental FTIR-ATR, Raman and INS wavenumbers (cm-1) for the burned skeletal samples from Egyptian mummies of the National Museum of Brazil
From: Effects of fire on Egyptian mummies: an optical and neutron vibrational spectroscopy study
FTIR-ATR | Raman | INS | Assignment |
|---|---|---|---|
4255 | OHlib + ν(OH) (HAp) | ||
3570 | 3570 | 3570 | ν(OH) (HAp) |
3526 | ν3(OH) (gypsum, CaSO4.2H2O) | ||
3402 | ν1(OH) (gypsum, CaSO4.2H2O) | ||
ca. 3400 | ca. 3400 | ν(OH) (water) | |
3285 | 3350 | Amide A (collagen) | |
2850–2960 | 2960 | ν(CH) (lipids, collagen) | |
2520 | 3rd overtone OHlib (HAp) | ||
2009 | ν(NC≡C) (cyanamide) | ||
1900 | 2nd overtone OHlib (HAp) | ||
1683 | δ(HOH) (gypsum, CaSO4.2H2O) | ||
1650–60 | 1650 | 1650–60 | Amide I (collagen) |
1620 | δ(HOH) (gypsum, CaSO4.2H2O) + δ(HOH) (H2O) | ||
1610 | ν(CC)G-band carbon black / ν(CO3) | ||
1550 | Amide II (collagen) + ν3(CO32-)A | ||
1530-40 | ν3(CO3)A (antisymmetric stretching) | ||
1460 | ν3(CO3)A+B (antisymmetric stretching) | ||
1400–1430 | ν3(CO3)B (antisymmetric stretching) | ||
1360 | ν(CC)D-band carbon black | ||
1310 | 1310 | 1st overtone OHlib (HAp) | |
1000–1250 | νas(OSiO) (egyptian blue, CaCuSi4O10) | ||
1107 | 1135 | ν3(SO4) (gypsum, CaSO4.2H2O, antisymmetric stretching) | |
1032, 1065 | 1076 | ν3as(PO4) (triply degenerate) + ν1(CO3)B | |
1070 | νas(OSiO) (egyptian blue, CaCuSi4O10) | ||
1030 | ν2(HCO3) | ||
1008 | ν1(SO4) (gypsum, CaSO4.2H2O, symmetric stretching) | ||
962 | 960 | ν1s(PO4) (nondegenerate) | |
915 | 915 | ν(HCO3) | |
880 | ν2(CO3)A | ||
875–870 | ν(HPO4) | ||
870 | ν2(CO3)B | ||
710 | ν(CO) (Ca(CO3)) | ||
702 | δ(NC ≡ N) (cyanamide, deformation) | ||
667 | 674 | ν4(SO4) (gypsum, CaSO4.2H2O, antisymmetric bending) | |
660–800 | 670 | νs(OSiO) (egyptian blue, CaCuSi4O10) | |
630–660 | 630–650 | OHlib (HAp) | |
620 | ν4(SO4) (gypsum, CaSO4.2H2O, antisymmetric bending) | ||
561, 575, 601 | 580, 593, 608 | 606 | ν4(PO4)bend (triply degenerate); ν4(HPO4) |
571 | ν2(PO4)bend (doubly degenerate) | ||
495 | ν2(SO4) (gypsum, CaSO4.2H2O, symmetric bending) | ||
442 | ν2(HPO4); ν2(PO4) | ||
420–430 | δ(SiO2) (egyptian blue, CaCuSi4O10) | ||
416 | ν2(SO4) (gypsum, CaSO4.2H2O, symmetric bending) | ||
335 | ν(HgS) (cinnabar, HgS) | ||
290–330 | ν3(Ca–OH); OHtrans (HAp) | ||
260 | ν(HgS) (cinnabar, HgS) | ||
250 | τ(CH3) (collagen, torsion) | ||
190–230 | (Ca–PO4)lattice | ||
179 | H2O lattice mode (gypsum, CaSO4.2H2O) | ||
130–150 | OHtrans (water) + (Ca–PO4)lattice | ||
137 | ν(PbO) (litharge, tetragonal PbO) | ||
79 | ν(Ca–PO4)lattice |
