. 2020 Nov 2;10:18851. doi: 10.1038/s41598-020-75936-3

Table 6.

Oxide composition (concentration) of RH and RB (%) determined by XRF analysis.

Sample	Na₂O	MgO	SiO₂	P₂O₅	SO₃	K₂O	TiO₂	Cr₂O₃	MnO	Fe₂O₃	CuO	ZnO	Al₂O₃	CaO
RH (%)	0.01	0.11	27.44	0.32	0.17	1.65	0.01	0.03	0.24	0.17	0.01	0.02	0.04	0.47
RB (%)	0.24	0.18	13.46	0.32	0.27	3.73	0.06	0.01	0.36	0.53	0.02	0.22	0.15	-