Vibrational Study, Reinvestigation of the Crystal Structure of MgHPO₄.3H₂O and Calculated IR Frequencies for the PO₄^3- by Isotopic Substitutions

The monohydrogenomonophosphatetrihydrate of magnesium MgHPO₄.3H₂O was reinvestigated by X-ray diffraction, vibrational spectroscopy, nuclear magnetic resonance and calculation of the IR frequencies by using isotopic substitutions. MgHPO₄.3H₂O is orthorhombic, space group Pbca with the following unit-cell parameters: a = 10.0133(2) Å, b= 10.2136(1) Å, c =10.6853(2) Å, Z = 8 and V = 1092.81(3) Å3. Raman and infrared spectra of MgHPO₄.3H₂O have been recorded and interpreted on the basis of factor group analysis. The occurrence of the four frequencies ν1, v2, v3, v4 in the vibrational spectra confirms the existence of the PO₄^3- tetrahedron.

Other Information

Published in: Biointerface Research in Applied Chemistry
License: https://creativecommons.org/licenses/by/4.0
See article on publisher's website: https://dx.doi.org/10.33263/briac123.41404154