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Table 6 FTIR band assignment of calcite, tile dust and sticky rice powder

From: Effects of sticky rice addition on the properties of lime-tile dust mortars

 

Wavenumber (cm−1)

Band assignment

Calcite

 ~ 2513

ν1 (CO32− symmetric stretching) + ν3 (CO32− asymmetric stretching) and/or 2ν2 (O-C-O out-of-plane bending) + ν4 (C-O in-plane bending) [47]

 ~ 1791

ν1 + ν4 [47, 48]

 ~ 1422

ν3 [48]

 ~ 878

ν2 [48]

 ~ 709

ν4 [48]

Tile dust

 ~ 1079

Asymmetric si–o stretching [49, 50]

 ~ 796 and 775

Symmetric si–o stretching [50, 51]

 ~ 694

Si–O symmetric bending [50]

 ~ 648

Tetrahedral ring vibration [52]

 ~ 467

Si–O-Si bending [49, 50]

Sticky rice

 ~ 3700–3000

O–H stretching of carboxylic acids and polysaccharides [53,54,55]

 ~ 2929

Aliphatic C-H stretching in CH2 and CH3 groups of carboxylic acids and esters in polysaccharides [53,54,55]

 ~ 1652

Asymmetric -COO stretching [55]

C = O symmetric stretching (amide I) [53, 54]

Water molecules absorbed in the amorphous region [56]

 ~ 1533

N–H in-plane bending vibration strongly coupled to C-N stretching vibration of protein (amide II) [53, 57]

 ~ 1457

CH2 group scissoring modes [53]

 ~ 1419

−CH2 bending and symmetric −COO stretch [55, 58]

 ~ 1371

CH deformation or CH2 vibration [59]

 ~ 1338

−CCH and −OCH coupled bend CH2 rocking vibration [59]

 ~ 1241

CH2OH (side chain) related mode [59]

 ~ 1155

Vibrations of the glucosidic C–O–C bond and the whole glucose ring [58]

 ~ 1082

C–O–H bend vibration [59]

Crystalline regions of starch [58]

 ~ 1019

Amorphous regions of starch [58]

 ~ 928

Skeletal mode vibrations of α(1 → 4) skeletal glycosidic linkage [58, 59]

 ~ 861

C(1)H, CH2 deformation vibration [59]

 ~ 764

C–C stretch [60]

 ~ 709

Skeletal modes [59]

 ~ 577

Skeletal modes of the pyranose ring [58]