Zirconium nitride

Crystal structure
	__ Zr 3+ __ N 3−
General
Surname	Zirconium nitride
other names	Zirconium mononitride; Zirconium nitride;
Ratio formula	ZrN
Brief description	yellow to brown odorless solid
External identifiers / databases
EC number	247-166-2
ECHA InfoCard	100,042,864
PubChem	94359
Wikidata	Q205646
properties
Molar mass	105.23 g mol −1
Physical state	firmly
density	7.09 g cm −3
Melting point	2980 ° C
solubility	almost insoluble in water; soluble in concentrated sulfuric acid and hydrofluoric acid;
safety instructions
H and P phrases	H: 228-315-319-335
	P: 210-241-305 + 351 + 338-302 + 352-405-501
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Zirconium nitride is an inorganic chemical compound of zirconium from the group of nitrides .

Extraction and presentation

Zirconium nitride can be prepared using the same methods as titanium nitride .

Yellow-brown zirconium nitride is obtained from the synthesis from the elements at 1200 ° C.

When producing zirconium nitride from zirconium (IV) chloride by the growth process , a lower temperature (2000 to 2400 ° C) is required in the presence of hydrogen (H ₂ + N ₂ or ammonia ) than in pure nitrogen (2900 ° C). In the latter case, the deposition takes place significantly more slowly than in the presence of hydrogen. By nitriding zirconium wires, i.e. H. By heating in pure nitrogen, even at a temperature just below the melting point of zirconium (1860 ° C), zirconium nitride is obtained only very slowly and, moreover, in a highly loosened, brittle state.

At relatively low temperatures, defined zirconium nitride phases can be obtained by ammonolysis of zirconium halides , in particular of zirconium (IV) iodide, via the intermediate stage zirconium nitride iodide ZrNI. At 700 ° C mainly brown Zr ₃ N _{4 forms} (o-Zr ₃ N ₄ with a density of 6.32 g / cm ³ and the space group Pnam), at 750 ° C blue zirconium nitride Zr _x N (x = 0, 94–0.81), above 1000 ° C the metallically conductive yellow zirconium nitride is formed.

Under high pressure conditions, ammonolysis or the reaction of ZrN with nitrogen forms a zirconium nitride Zr ₃ N _{4 of} the cubic Th ₃ P ₄ type with the space group I 4 3 d .

Zirconium nitride is a very hard and brittle yellow-brown odorless solid. It has a cubic crystal structure of the sodium chloride type with the space group Fm 3 m (space group no. 225) . Template: room group / 225

Zirconium nitride is used as a hard coating material (e.g. zirconium nitride multilayer coating ).

↑ ^a ^b ^c ^d ^e ^f ^g ^h Data sheet Zirconium nitride, 99.5% (metals basis excluding Hf), Hf <3% from AlfaAesar, accessed on June 6, 2013 ( PDF )(JavaScript required) .
↑ ^a ^b ^c Roger Blachnik (Ed.): Pocket book for chemists and physicists . Volume III: Elements, Inorganic Compounds and Materials, Minerals . founded by Jean d'Ans, Ellen Lax. 4th, revised and revised edition. Springer, Berlin 1998, ISBN 3-540-60035-3 , pp. 820 ( limited preview in Google Book search).
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↑ ^a ^b Dzivenko, Dmytro: High-pressure synthesis, structure and properties of cubic zirconium (IV) - and hafnium (IV) nitrides. Dissertation (2009), urn : nbn: de: tuda-tuprints-18742
↑ Werner Martienssen, Hans Warlimont: Springer Handbook of Condensed Matter and Materials Data . Springer, 2005, ISBN 978-3-540-30437-1 , pp. 470 ( limited preview in Google Book search).
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