Meet the Cerium(IV) Phosphate Sisters: CeIV(OH)PO4 and CeIV2O(PO4)2

Two new cerium(IV) phosphates were obtained: cerium(IV) hydroxidophosphate, Ce(OH)PO4, and cerium(IV) oxidophosphate, Ce2O(PO4)2, which were shown to complement the classes of isostructural compounds M(OH)PO4 and R2O(PO4)2, where M=Th, U and R=Th, U, Np, Zr. Ce2O(PO4)2 oxidophosphate is formed by el...

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Published in:Chemistry : a European journal 2020-09, Vol.26 (53), p.12188-12193
Main Authors: Kozlova, Taisiya O., Mironov, Andrey V., Istomin, Sergey Y., Birichevskaya, Karina V., Gippius, Andrey A., Zhurenko, Sergey V., Shatalova, Tatyana B., Baranchikov, Alexander E., Ivanov, Vladimir K.
Format: Article
Language:English
Subjects:
basic phosphates
ceric hydroxophosphates
ceric oxophosphates
Cerium
Chemistry
Crystal structure
hydrothermal treatment
Phosphates
rare earths
Thermal decomposition
Unit cell
Zirconium
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Summary:Two new cerium(IV) phosphates were obtained: cerium(IV) hydroxidophosphate, Ce(OH)PO4, and cerium(IV) oxidophosphate, Ce2O(PO4)2, which were shown to complement the classes of isostructural compounds M(OH)PO4 and R2O(PO4)2, where M=Th, U and R=Th, U, Np, Zr. Ce2O(PO4)2 oxidophosphate is formed by elimination of H2O from the crystal structure of Ce(OH)PO4 during its thermal decomposition. The structures of Ce(OH)PO4 and Ce2O(PO4)2 are related to each other with the same Cmce space group and similar unit cell parameters (a=6.9691(3) Å, b=9.0655(4) Å, c=12.2214(4) Å, V=772.13(8) Å3, Z=8; a=7.0220(4) Å, b=8.9894(5) Å, c=12.544(1) Å, V=791.8(1) Å3, Z=4, respectively). New compounds discovered: Two previously unknown cerium(IV) phosphates with similar structures, Ce(OH)PO4 and Ce2O(PO4)2, are discovered. Ce(OH)PO4 belongs to a very limited family of ceric basic salts. Ce2O(PO4)2 can be obtained by a gentle dehydration of Ce(OH)PO4.
ISSN:0947-6539
1521-3765
DOI:10.1002/chem.202002527