Chemical, Mineralogical, and Refractory Characterization of Kaolin in the Regions of Huayacocotla-Alumbres, Mexico

Table 3

Semiquantitative analysis of the kaolin samples by SEM in percentage weight (SD).

Compounds	H-RMC-2	H-RMC-3	H-RMC-6	H-RMC-16	A-RMC-25	A-RMC-31	A-RMC-38	A-RMC-39
SiO2	69.8 (4.6)	66.0 (5.2)	76.4 (5.0)	80.8 (5.4)	88.7 (7.4)	81.1 (6.8)	76.9 (4.6)	54.9 (3.6)
Al2O3	21.2 (1.4)	31.7 (2.8)	21.7 (2.4)	18.7 (2.4)	10.0 (2.4)	18.0 (3.6)	22.1 (3.4)	41.6 (4.6)
Na2O	0.1 (0.1)	0.1 (0.1)	0.1 (0.1)	0.1 (0.1)	0.1 (0.1)	0.4 (0.1)	0.1 (0.1)	0.1 (0.1)
MgO	1.0 (0.4)	0.2 (0.1)	0.1 (0.1)	0.1 (0.1)	0.3 (0.1)	0.1 (0.1)	0.2 (0.1)	0.2 (0.1)
K2O	2.7 (0.8)	1.1 (0.6)	0.1 (0.1)	0.1 (0.1)	0.2 (0.1)	0.2 (0.1)	0.1 (0.1)	0.1 (0.1)
CaO	0.1 (0.1)	0.1 (0.1)	0.1 (0.1)	0.1 (0.1)	0.1 (0.1)	0.1 (0.1)	0.1 (0.1)	0.1 (0.1)
FeO	4.5 (1.4)	0.4 (0.1)	0.1 (0.1)	0.1 (0.1)	0.4 (0.1)	0.1 (0.1)	0.4 (0.1)	1.3 (0.4)
TiO2	0.7 (0.2)	0.5 (0.1)	1.6 (0.4)	0.2 (0.1)	0.2 (0.1)	0.2 (0.1)	0.2 (0.1)	1.7 (0.4)