Table 4. Prediction Accuracy of Raman Spectra from Figure 7 Using a PLSR Model.

concentrations (g/kg solvent)	kyanite	wollastonite	olivine	silica	zircon
Figure 7a predicted	81.58	25.57	33.91	146.61	19.71
Figure 7a gravimetric	81.41	16.97	41.67	142.03	18.67
Figure 7b predicted	57.96	39.33	18.31	120.80	25.50
Figure 7b gravimetric	64.69	41.96	11.09	135.68	32.10