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Full Record Details
Persistent URL
http://purl.org/net/epubs/work/42169
Record Status
Checked
Record Id
42169
Title
Synthesis, stoichiometry and thermal stability of Zn
3
N
2
powders prepared by ammonolysis reactions
Contributors
G Paniconi (Nottingham U.)
,
Z Stoeva (Nottingham U.)
,
RI Smith (STFC Rutherford Appleton Lab.)
,
PC Dippo (National Renewable Energy Laboratory)
,
BL Gallagher (Nottingham U.)
,
DH Gregory (Glasgow U.)
Abstract
Zn3N2 powders were prepared by ammonolysis reactions at 600 °C and examined by thermogravimetric analysis, powder X-ray and neutron diffraction. The powders obtained in this way are unstable in an oxygen atmosphere above 450 °C. In an argon atmosphere, the powders are stable up to their decomposition point at around 700 °C. Structural models obtained from Rietveld refinements against the powder neutron diffraction data indicate that the Zn3N2 powders so-prepared have the anti-bixbyite structure and are almost certainly stoichiometric with no compelling evidence of nitrogen vacancies. Further, no evidence was found for aliovalent oxygen substitution at the nitrogen sites. The calculated bond valence sums imply that Zn3N2 cannot be described as a 100% ionic compound. The structural findings are supported by photoluminescence measurements that reveal a band gap of approximately 0.9 eV.
Organisation
ISIS
,
ISIS-POLARIS
,
STFC
Keywords
Materials
,
Chemistry
,
powder neutron diffraction
,
zinc nitride
,
stoichiometry
,
nitrogen vacancies
,
ammonolysis
Funding Information
Related Research Object(s):
Licence Information:
Language
English (EN)
Type
Details
URI(s)
Local file(s)
Year
Journal Article
J Solid State Chem
181, no. 1 (2008): 158-165.
doi:10.1016/j.jssc.2007.11.005
2008
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