Preparation, Characterization, and Luminescence Properties of Orthorhombic Sodium Sulphate

Table 2

The characteristic FTIR spectra of Na₂SO₄.

Nature of Bond	IR absorption peak (cm^−1)
	200°C	400°C	600°C
M–O	2847	2854	—
	2921	2921	—
	3415	3444	3422
S–O	613	613	616
	1117	1129	1121