title: On the crystal structure and thermal decomposition of ammonium-iron(III) bis(hydrogenphosphate).
abstract: NH(4)Fe(HPO(4))(2) and its deuterated form have been synthesized as monophasic polycrystalline materials. Their crystal structures, including hydrogen positions, were determined by Rietveld refinement and Fourier synthesis using constant-wavelength neutron powder diffraction data. In addition, the thermal decomposition of NH(4)Fe(HPO(4))(2) was found to give mixtures of Fe(4)(P(2)O(7))(3) and Fe(PO(3))(3)via NH(4)FeP(2)O(7) formation, the crystal structure of which has also been refined from X-ray powder diffraction data.
authors.affiliation: Departamento de Física, Universidad de Oviedo, 33007, Oviedo, Spain.
authors.forename: Belén F
authors.initials: BF
authors.lastname: Alfonso
authors.forename: Jesús A
authors.initials: JA
authors.lastname: Blanco
authors.forename: Maria Teresa
authors.initials: MT
authors.lastname: Fernández-Díaz
authors.forename: Camino
authors.initials: C
authors.lastname: Trobajo
authors.forename: Sergei A
authors.initials: SA
authors.lastname: Khainakov
authors.forename: José R
authors.initials: JR
authors.lastname: García
mesh_terms: D003460:Crystallization; D005290:Ferric Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D015394:Molecular Structure; D010756:Phosphoric Acids / Q000737:chemistry*; D033362:Powder Diffraction; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D013696:Temperature
chemical_list: D005290:Ferric Compounds; D010756:Phosphoric Acids; D000644:Quaternary Ammonium Compounds