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Raman features of major feldspar minerals

 

Structure & chemistry of feldspar minerals:

Characterizing feldspars, a major minerals formed in igneous systems, is important in determining rock petrogenesis.

Can we distinguish different types of feldspars using only Raman spectra?

Vibrational mode assignment distinguishing three end-members

Structural and compositional variations in K-Na feldspars and Na-Ca feldspars:

Structural order/disorder reflects the forming temperature of K-feldspar. Compositional variation causes further structural distortion. Structural order/disorder reflects the forming temperature of Na-Ca feldspar. Compositional variation causes further structural distortion.

 

To distinguish seven types of feldspars:

Using Raman peaks in three characteristic regions of Raman spectra of feldspars, we can distinguish seven types of feldspars

Reference: Freeman J., Wang A., Kuebler K. E., Haskin L. A., Raman Spectroscopic Characterization of the Feldspars Implications for In Situ Surface Mineral Characterization in Planetary Exploration. Abstract #1676, 34th LPSc, 2003.

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