Table 2 Average chemical composition variation of evaporitic samples before and after slaking with distilled water and groundwater.

	wt. (%)	CaO	SO₃	Na₂O	MgO	Al₂O₃	SiO₂	P₂O₅	K₂O	Fe₂O₃	TiO₂	Ti	Cl	Mn	Sr	Ba	Zr
Slaking fluid	Before slaking	47.494	50.074	0.25	0.844	0.164	0.613	0.023	0.051	0.122	0.024	0.015	0.240	0.001	0.088	0.019	0.013
Distilled water	After slaking	46.519	51.835	0.466	0.643	0.108	0.106	0.036	0.014	0.036	0.001	0.001	0.078	0.000	0.114	0.015	0.001
	Differences	0.975	−1.761	−0.216	0.201	0.056	0.507	−0.013	0.037	0.086	0.023	0.014	0.161	0.001	−0.026	0.004	0.012
Groundwater*	After slaking	39.801	42.523	0.673	0.707	0.076	0.121	0.021	0.122	0.039	0.001	0.001	3.220	0.000	0.144	0.017	0.001
	Differences	7.693	7.755	−0.423	0.137	0.088	0.492	0.002	−0.071	0.083	0.023	0.014	−2.980	0.001	−0.056	0.002	0.012
Total samples = 14–16**

*Groundwater specification: Groundwater level = 10–40 m, Temperature = 21.5–31.2 (\(^\circ \)C), Salinity = 20,000–65,000 (ppm), pH = 7.14–9.45, TDS = 32,700–175,360 (ppm), EC = 28,100–274,000 (μ mhos/cm).
**Chemical composition of two samples were missing in case of groundwater as a slaking fluid.

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