Table 5.

Elemental analysis of sandstone using XRF.

Element	Si ${\mathrm{O}}_2$	CaO	${\text{Al}}_2{\mathrm{O}}_3$	${\text{Fe}}_2{\mathrm{O}}_3$	${\mathrm{K}}_2$ O	${\text{Na}}_2$ O	MgO	Ti ${\mathrm{O}}_2$	${\mathrm{P}}_2{\mathrm{O}}_5$	MnO	SrO	Cl
Weight (%)	47.6	15.10	13.30	7.95	3.64	2.36	2.11	1.21	0.3	0.21	0.2	0.2