Illustrative Example: Analysis of a Feldspar Mineral
Figures 1-6 below display the high-resolution XPS spectra for elements on the surface of a freshly ground feldspar sample. We use high-resolution analyses to determine the various chemical species present in the sample.
Analysis Details
In each spectrum, we identified three component peaks corresponding to three different chemical phases:
- Phase 1: Na₂O • 0.76 K₂O • 1.59 Al₂O₃ • 12.64 SiO₂ • 0.84 H₂O
- Phase 2: Na₂O • 0.33 K₂O • 1.26 Al₂O₃ • 7.86 SiO₂ • 8.48 H₂O
- Phase 3: Na₂O • 0.19 K₂O • 1.62 Al₂O₃ • 7.25 SiO₂ • 9.79 H₂O
Feldspar Varieties
Feldspar comes in various types, including Soda Feldspar (Na₂O • Al₂O₃ • 6 SiO₂), Potash Feldspar (K₂O • Al₂O₃ • 6 SiO₂), and Calcium Feldspar (CaO • Al₂O₃ • 2 SiO₂). The feldspar we analyzed is a complex compound with three distinct chemical phases. Phase 1 is the major component, while Phases 2 and 3 are minor. By taking advantage of the differential charging of these species, we could identify each phase separately. Without this differential charging, the material would show a weighted average of these three compositions.
Key Findings
The main phase has a relatively low degree of hydration, whereas the two minor phases are highly hydrated. In certain applications, the presence of these highly hydrated phases is significant.
XPS High-Resolution Spectra
For a detailed view of the spectra, refer to Figures 1-6. These figures illustrate the high-resolution XPS analysis of the feldspar sample.
Additional Information
To learn more about XPS high-energy resolution chemical analysis, visit our XPS page.
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If you need further assistance with XPS analysis or other material evaluations, please contact us today. Our experts are ready to help with accurate and detailed assessments.
