Research Article
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 |
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