Ammonium–cobalt–nickel phosphates, NH{sub 4}[Co{sub 1−x}Ni{sub x}PO{sub 4}]·H{sub 2}O

Journal Article · Tue Oct 15 00:00:00 EDT 2013 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/J.JSSC.2013.07.039· OSTI ID:22274107

Torre-Fernández, Laura; Trobajo, Camino ^[1]; Pedro, Imanol de ^[2]; Alfonso, Belén F. ^[3]; Fabelo, Oscar ^[4]; Blanco, Jesús A. ^[3]; García-Granda, Santiago ^[1]

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1. Departamentos de Química Física y Analítica y Química Orgánica e Inorgánica, Universidad de Oviedo-CINN, Oviedo, Asturias 33006 (Spain)
2. CITIMAC, Facultad de Ciencias, Universidad de Cantabria, 39005 Santander (Spain)
3. Departamento de Física, Universidad de Oviedo, Oviedo, Asturias 33007 (Spain)
4. Institut Laue Langevin, Grenoble, France and Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, Zaragoza (Spain)

The ammonium–cobalt–nickel phosphates, NH{sub 4}[Co{sub 1−x}Ni{sub x}PO{sub 4}]·H{sub 2}O (x=0.00, 0.34, 0.59, 0.70, 1.00), and the deuterated forms, ND{sub 4}[Co{sub 1−x}Ni{sub x}PO{sub 4}]·D{sub 2}O (x=0.00, 0.38, 0.48, 0.69, 0.85), have been synthesized under mild hydrothermal conditions and characterised using X-ray and neutron diffraction, chemical and thermal analysis, and magnetic measurements. Their crystal structures, including hydrogen positions, were determined by Rietveld refinement using single-crystal X-ray and neutron powder diffraction data. The space group of these orthorhombic crystals modifies as a function of their composition. The magnetic susceptibility and magnetization measurements of these ammonium–cobalt–nickel phosphates show antiferromagnetic behaviour, and the Neel temperature evolves from 5.5 K (x=0.00) up to 13.2 K (x=1.00). - Graphical abstract: We obtained single crystals for all the members of the family. In this series, although all crystals are orthorhombic, the space group changes as a function of the composition, showing how the single-crystal diffraction data is capable to manifest structural subtleties that had not been described before for this group of materials. All the investigated materials behave antiferromagnetically with ordering temperatures from 5.5 K up to 13.2 K. Display Omitted - Highlights: • The ammonium–cobalt–nickel phosphates, NH{sub 4}[Co{sub 1−x}Ni{sub x}PO{sub 4}]·H{sub 2}O (x=0.00, 0.34, 0.59, 0.70, 1.00) and the deuterated forms ND4[Co1-xNixPO4]·D{sub 2}O (x=0.00, 0.38, 0.49, 0.68, 0.85) have synthesized by hydrothermal synthesis. • The structural studies of these compounds are introduced as a function of the composition. • The magnetic studies show an antiferromagnetically behavior with ordering temperatures from 5.5 K to 13.2 K.

• OSTI ID: 22274107
• Journal Information: Journal of Solid State Chemistry, Vol. 206; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ANTIFERROMAGNETISM
COBALT
DEUTERIDES
FUNCTIONS
HYDROTHERMAL SYNTHESIS
MAGNETIC SUSCEPTIBILITY
MAGNETIZATION
MONOCRYSTALS
NEEL TEMPERATURE
NEUTRON DIFFRACTION
NICKEL
ORTHORHOMBIC LATTICES
PHOSPHATES
SPACE GROUPS
THERMAL ANALYSIS
X RADIATION
X-RAY DIFFRACTION