Table 2. XRF Profile of the “Major Oxides” of Raw Samples.

	LRS_H	LRS_HF	LRS_HK	LRS_HKF	LRS_K	LRS_KF
Al2O3	36.19	29.80	38.55	30.08	40.53	36.90
SiO2	55.73	56.48	54.71	56.78	56.78	54.41
Fe2O3	0.56	6.07	0.40	5.33	0.57	3.74
TiO2	0.46	0.47	0.66	2.00	0.67	0.32
K2O	5.96	4.68	4.72	4.30	0.38	3.59
P2O5	0.517	0.66	0.505	0.713	0.528	0.511