Physicochemical and Electrical Properties of Praseodymium Oxides

Table 1

Stoichiometry of the known members of the homologous series Pr_𝑛O_2𝑛−2. Reproduced from J. Solid State Electrochem., 2001, 5, 531. Copyright 2001, Springer-Verlag [4].

Value of 𝑛	Formula	Phase	𝑥 in PrO𝑥	Average oxidation state of Pr
4	Pr2O3	θ	1.500	3.000
7	Pr7O12	ι	1.714	3.428
9	Pr9O16	ζ	1.778	3.556
10	Pr5O9	ε	1.800	3.600
11	Pr11O20	δ	1.818	3.636
12	Pr6O11	β	1.833	3.667
infinity	PrO2		2.000	4.000