A high-pressure, Raman spectroscopic study of bis(pyrophosphato)tetrazinc(II) and -tetramanganese(II) decahydrate salts

The effect of high pressures on the Raman spectra of M4(P2O7)2 · 10H2O (M = Zn, Mn) have been examined. The zinc salt undergoes a reversible phase transition at 15-20 kbar.