Solid state decomposition studies on tetraperoxo species of transition metals. Kinetics of the isothermal decomposition of K3Nb(O2)4 and K3Ta(O2)4

Vibrational spectra of the peroxotantalates (NH4)3[Ta(O2)4], K3[Ta(O2)4], Rb3[Ta(O2)4] and Cs3[Ta(O2)4] and the crystal structure of Rb3[Ta(O2)4]

“…The knowledge on the vibrational spectra of all these compounds is very limited. Some work has been done by Griffith [11] and Griffith et al [12] who report on an intense band at 807 cm À1 in the infrared spectrum of K 3 [Ta(O 2 ) 4 ] due to the O-O stretching vibration which is also reported by Jere et al [13] with a slightly different value. For the same vibration Bogdanov et al [14] report a much higher value (860 cm À1 ) and for Rb 3 [Ta(O 2 ) 4 ] and Cs 3 [Ta(O 2 ) 4 ] they find 870 cm À1 .…”