Abstract

The new form of cerium(III) ultraphosphate, CeP 5O 14 described here is triclinic with a = 9.227(5), b = 8.890(5), c = 7.219(4)Å, α = 110.12(5)°, β = 102.68(5)°, γ = 82.13(5)°. Space group is P1. Z = 2. D x = 3.186 mg/m 3. Crystal structure of this salt has been solved by using 4587 independent reflections with a final R value 0.029. The atomic arrangement can be described as [P 10O 28] sheets spreading in (110) planes. The internal structure of these sheets is mainly a linkage of (P 12O 36) rings in which 40% of the phosphorus atoms are branching phosphorus.

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