Structural and vibrational study of a new mixed dipotassium hydrogenselenate dihydrogenphosphate K2(HSeO4)1.5(H2PO4)0.5

The infrared spectrum at room temperature is investigated in the frequency range 4000-400 cm−1 and confirm a structural disorder in this material and the coexistence of two different anions (H2PO4− and HSeO4−) in the same crystal structure.