Silver delafossite nitride, AgTaN{sub 2}?

Journal Article · Sat Jan 15 04:00:00 EST 2011 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2010.10.009· OSTI ID:21504035

Miura, Akira ^[1]; Lowe, Michael; Leonard, Brian M; Subban, Chinmayee V ^[2]; Masubuchi, Yuji; Kikkawa, Shinichi ^[3]; Dronskowski, Richard ^[1]; Hennig, Richard G ^[4]; Abruna, Hector D ^[2]

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1. Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen (Germany)
2. Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853 (United States)
3. Graduate School of Engineering, Hokkaido University, N13W8, Kita-ku Sapporo 060-8628 (Japan)
4. Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853 (United States)

A new silver nitride, AgTaN{sub 2}, was synthesized from NaTaN{sub 2} by a cation-exchange reaction, using a AgNO{sub 3}-NH{sub 4}NO{sub 3} flux at 175 {sup o}C. Its crystal structure type is delafossite (R3-bar m) with hexagonal lattice parameters of a=3.141(3) A, c=18.81(2) A, in which silver is linearly coordinated to nitrogen. Energy dispersive X-ray analysis and combustion nitrogen/oxygen analysis gave a composition with atomic ratios of Ag:Ta:N:O as 1.0:1.2(1):2.1(1):0.77(4), which is somewhat Ta rich and indicates some oxide formation. The X-ray photoelectron spectroscopy analysis showed a Ta- and O-rich surface and transmission electron microscope observation exhibited aggregates of ca. 4-5 nm-sized particles on the surface, which are probably related to the composition deviation from a AgTaN{sub 2}. The lattice parameters of stoichiometric AgTaN{sub 2} calculated by density functional theory agree with the experimental ones, but the possibility of some oxygen incorporation and/or silver deficiency is not precluded. -- Graphical abstract: A delafossite silver nitride, AgTaN{sub 2}, was synthesized from NaTaN{sub 2} by a cation-exchange reaction using a AgNO{sub 3}-NH{sub 4}NO{sub 3} flux. It contains N-Ag-N linear bonding. Display Omitted

• OSTI ID: 21504035
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 1 Vol. 184; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ALKALI METAL COMPOUNDS
AMMONIUM COMPOUNDS
AMMONIUM NITRATES
CALCULATION METHODS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DENSITY FUNCTIONAL METHOD
ELECTRON MICROSCOPY
ELECTRON SPECTROSCOPY
HEXAGONAL LATTICES
ION EXCHANGE
LATTICE PARAMETERS
MICROSCOPY
NITRATES
NITRIDES
NITROGEN COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
PNICTIDES
REFRACTORY METAL COMPOUNDS
SILVER COMPOUNDS
SILVER NITRATES
SILVER NITRIDES
SODIUM COMPOUNDS
SODIUM NITRIDES
SPECTROSCOPY
TANTALUM COMPOUNDS
TANTALUM NITRIDES
TEMPERATURE RANGE
TEMPERATURE RANGE 0400-1000 K
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
TRIGONAL LATTICES
VARIATIONAL METHODS
X-RAY PHOTOELECTRON SPECTROSCOPY