How can you identify kaolinite from FTIR?
This page summarizes the recurring FTIR evidence reported for kaolinite, including the most frequent peaks, supporting functional groups, and literature-backed interpretation patterns. It is a structured evidence page, not a claim of automatic single-spectrum certainty.
Backed by 22 cited sources
Quick answer
kaolinite is usually reported with a recurring pattern of peaks and functional-group evidence. The most useful approach is to cross-check at least two characteristic peaks before treating it as a match, then verify whether the full spectrum still fits the same material family.
Peak interpretation
Possible materials / groups
| Grup funcțional | Dovezi |
|---|---|
| Hydroxyl (O-H) | 66 |
| Silicon-oxygen (Si-O) | 54 |
| Silicon (Si) | 28 |
| Siloxane (Si-O-Si) | 18 |
| Metal oxygen | 14 |
| Water (H2O) | 10 |
| Phosphate (PO4) | 7 |
| Metal hydroxyl | 6 |
Spectrum logic
The logic here is evidence aggregation: repeated literature mentions of kaolinite, repeated peak positions, and repeated functional-group associations. A strong material hypothesis should still be supported by multiple peaks that agree with each other, not by one headline band alone.
Real-world usage
This page is designed for polymer identification, incoming-material QC, unknown plastic analysis, recycled-content review, and literature-backed interpretation of reference spectra.
Common mistakes
- Calling a material match too early because one famous peak is present.
- Ignoring sample prep, fillers, oxidation, water, or additives that can change the apparent pattern.
- Using literature evidence without checking whether your own sampling mode and spectrum quality are comparable.
Verification advice
Use DSC, GC-MS, or TGA to validate the material hypothesis when the peak pattern is ambiguous or mixed.
Literature behind this page
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Souissi 等 - 2022 - Synthesis, Thermal Properties and Electrical Condu DOI: 10.21203/rs.3.rs-1294285/v1 -
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Review of Filters for Air Sampling and Chemical Analysis in Mining Workplaces DOI: 10.3390/min12101314 -
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Khang 等 - 2016 - Identification of clay minerals in reservoir rocks DOI: 10.1088/1755-1315/43/1/012004 -
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Negrao 等 - 2021 - Mineralogical Appraisal of Bauxite Overburdens fro DOI: 10.3390/min11070677 -
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Turki 等 - 2022 - Environmental Application of Acid Activated Kaolin DOI: 10.21203/rs.3.rs-809851/v1 -
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Ma 等 - 2019 - Investigation of the Optical, Physical, and Chemic DOI: 10.3390/su11143803 -
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Maciejewska - 2015 - INFLUENCE OF SPECTRAL INTERFERENCES ON THE RESULTS DOI: 10.13075/mp.5893.00212 -
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Oyebanjo 等 - 2018 - Mineral Constituents and Kaolinite Crystallinity o DOI: 10.1515/geo-2018-0012 -
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Study on Gemological Characteristics of Blue Sapphires from Baw-Mar Mine, Mogok, Myanmar DOI: 10.3390/cryst11111275 -
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Interactions between kaolinite and phosphinate-based flame retardant in Polyamide 6 DOI: 10.1016/j.clay.2018.02.021
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