A new story in the structural chemistry of cerium(IV) phosphate

Two different cerium(IV) phosphates have been prepared by ageing at 95 °C an aqueous solution made from Ce(NO 3) 6(NH 4) 2, nitric acid, and phosphoric acid with the following conditions: P/Ce=2, [HNO 3]=5.8 M and [Ce 4+]=0.1 M. The control over the formed solid was achieved through the ageing time....

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Vydáno v:	The Journal of physics and chemistry of solids Ročník 68; číslo 5; s. 795 - 798
Hlavní autoři:	Nazaraly, Micaela, Chanéac, Corinne, Ribot, François, Wallez, Gilles, Quarton, Michel, Jolivet, Jean-Pierre
Médium:	Journal Article Konferenční příspěvek
Jazyk:	angličtina
Vydáno:	Oxford Elsevier Ltd 01.05.2007 Elsevier
Témata:	A. Inorganic compounds C. TGA C. X-ray diffraction Condensed matter: structure, mechanical and thermal properties D. NMR Exact sciences and technology Inorganic compounds Physics Structure of solids and liquids; crystallography Structure of specific crystalline solids A. Inorganic compounds D. NMR C. TGA C. X-ray diffraction Aqueous solutions Thermogravimetry Aging Cerium phosphates XRD Nuclear magnetic resonance Solid structure
ISSN:	0022-3697, 1879-2553
On-line přístup:	Získat plný text
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Popis
Shrnutí:	Two different cerium(IV) phosphates have been prepared by ageing at 95 °C an aqueous solution made from Ce(NO 3) 6(NH 4) 2, nitric acid, and phosphoric acid with the following conditions: P/Ce=2, [HNO 3]=5.8 M and [Ce 4+]=0.1 M. The control over the formed solid was achieved through the ageing time. After 18 h, a metastable compound ( A), corresponding to Ce(PO 4) 1.5(H 2O)(H 3O) 0.5(H 2O) 0.5, is obtained, while after 5 days a stable one ( B), corresponding to Ce(PO 4)(HPO 4) 0.5(H 2O) 0.5, is recovered. Both solids exhibit a P/Ce ratio of 1.5. Their structures, 31P solid state NMR, and thermal behaviors are compared.
ISSN:	0022-3697 1879-2553
DOI:	10.1016/j.jpcs.2007.03.010