Silicate — FTIR absorption peaks and assignments
These are the characteristic FTIR wavenumbers where Silicate tends to absorb, compiled from published literature and ranked by supporting evidence. Each assignment is traceable to a source (DOI) and cross-validated against our 130,000+ reference spectra and knowledge graph.
Backed by 8 cited sources
Quick answer
Silicate is usually assigned by looking for a recurring cluster of characteristic peaks rather than one exact textbook number. The table below shows where the literature most often places this group in FTIR, ranked by accumulated evidence.
Characteristic FTIR peaks for Silicate
| Wavenumber (cm⁻¹) | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| 800 | 4 | 4 | 1.0 |
| 1000 | 3 | 3 | 1.0 |
| 1400 | 3 | 3 | 1.0 |
| 1050 | 2 | 2 | 1.0 |
| 900 | 2 | 2 | 1.0 |
| 470 | 2 | 2 | 1.0 |
| 945 | 2 | 2 | 1.0 |
| 437 | 1 | 1 | 1.0 |
| 870 | 1 | 1 | 1.0 |
| 990 | 1 | 1 | 1.0 |
| 950 | 1 | 1 | 1.0 |
| 1029 | 1 | 1 | 1.0 |
| 3325 | 1 | 1 | 1.0 |
| 1646 | 1 | 1 | 1.0 |
| 1100 | 1 | 1 | 1.0 |
| 462 | 1 | 1 | 1.0 |
| 710 | 1 | 1 | 1.0 |
| 3450 | 1 | 1 | 1.0 |
| 795 | 1 | 1 | 1.0 |
| 1776 | 1 | 1 | 1.0 |
| 680 | 1 | 1 | 1.0 |
| 1040 | 1 | 1 | 1.0 |
| 445 | 1 | 1 | 1.0 |
| 960 | 1 | 1 | 1.0 |
| 3620 | 1 | 1 | 1.0 |
| 1630 | 1 | 1 | 1.0 |
| 2924 | 1 | 1 | 1.0 |
| 1110 | 1 | 1 | 1.0 |
| 1423 | 1 | 1 | 1.0 |
| 463 | 1 | 1 | 1.0 |
Showing the 30 best-supported peaks of 82 total for Silicate.
Spectrum logic
A functional-group assignment becomes more confident when several expected bands appear together. Use this page to find the strongest-supported peaks, then confirm that the same sample exhibits a coherent pattern rather than a single isolated hit.
Real-world usage
These pages are useful for unknown material analysis, peak explanation in reports, polymer troubleshooting, and verifying whether a candidate material family is chemically plausible.
Common mistakes
- Using one functional-group page as a complete material verdict without checking the rest of the spectrum.
- Assuming the strongest band is always the most diagnostic one.
- Forgetting that processing, additives, aging, and mixtures can shift or broaden expected peaks.
Verification advice
Use DSC, GC-MS, or TGA when several material families share similar bands or when mixture effects make the FTIR assignment uncertain.
Literature behind these assignments
-
1429 cm⁻¹ confidence 1.0
“The sodium silicate μL and 100 DMSO per well was added to dissolve the shows the absorption bands around 1429, 970, 864 and cm-1”
Fabrication of Biogenic Silica Nanostructures from Sorghum bicolor Leaves for Food Industry Applications DOI: 10.1007/s12633-020-00379-4 -
3500 cm⁻¹ confidence 1.0
“The silane-modified NaeMt 29Si pattern of NMR spectrum of in DMF cm-1 eOH band after 3500 is associated with metal groups in silicate medium is presented in Fig.”
Silane functionalization of sodium montmorillonite nanoclay_ The effect of dispersing media on intercalation and chemical grafting DOI: 10.1016/j.clay.2017.12.020 -
1400 cm⁻¹ confidence 1.0
“1400cm-1 due to silicate, tetrahedral and triangular borate Table 2 depicts the corrosion weight loss data of the three 1700 groups, respectively.”
Corrosion Behavior Mechanism of Borosilicate Glasses Towards Different Leaching Solutions Evaluated by the Grain Method and FTIR Spectral Analysis Before and After Gamma Irradiation DOI: 10.1007/s12633-017-9586-1 -
470 cm⁻¹ confidence 1.0
“The second silicate bands are 4 cm-1 in C-S-H broadly characterized as O-Si-O deformation or bending modes, which occur near 451 470cm-1 cm-1 667cm-1 and in C-A-S-H and the band 663 or is due to Si-O-Si bending vibrations.”
He 等 - 2011 - Morphology and Structure of Aluminum Substituted C DOI: 10.4028/www.scientific.net/AMR.287-290.1193 -
1034 cm⁻¹ confidence 1.0
“cm-1 appeared at 1509 A weak peak at 1034 showed asymmetric stretching of C-OC and Si-O stretching vibration, indicating the presence of silicates.”
Structural, Physical, and Mechanical Analysis of ZnO and TiO2 Nanoparticle-Reinforced Self-Adhesive Coating Restorative Material DOI: 10.3390/ma14247507 -
975 cm⁻¹ confidence 1.0
“Intense, shoulder Intense Si-O 1000 SiO2 stretching lattice n/a Intense, shoulder Intense Si-O 975 SiO2 silicate stretching (kaolinite, illite) [86] n/a Intense, shoulder Intense”
FTIR photoacoustic spectroscopy for identification and assessment of soil components_ Chernozems and their size fractions DOI: 10.1016/j.pacs.2020.100162 -
800 cm⁻¹ confidence 1.0
“K FTIR spectra of these solutions show great variaFigure 3 FTIR spectra of silica sol, potassium silicate solution and tions in band shape and band location between 800 and the corresponding potassium silicate glass.”
Osswald 和 Fehr - 2006 - FTIR spectroscopic study on liquid silica solution DOI: 10.1007/s10853-006-7327-8 -
969 cm⁻¹ confidence 1.0
“The absorption band at 953 and is designated to the stretching 857cm-1 frequency of Sr-O bond and Si-O stretching frequency appears at in the prepared silicate materials is due to the asymmetric 969cm-1 stretching frequency of Si-O bond in”
Down-conversion characteristics of Eu3+ doped M2Y2Si2O9 (M = Ba, Ca, Mg and Sr) nanomaterials for innovative solar panels DOI: 10.1016/j.pnsc.2019.07.003
See Silicate in your own spectrum
Upload your FTIR spectrum and get a full interpretation report — peak assignments with literature citations, library matches, and a literature-backed analysis — in seconds.