Europium (III) nitride

Crystal structure
General
Surname	Europium (III) nitride
other names	Europium (III) nitride
Ratio formula	EuN
Brief description	black solid
External identifiers / databases
ECHA InfoCard	100,031,496
Wikidata	Q15628201
properties
Molar mass	165.97 g · mol -1
Physical state	firmly
safety instructions
GHS hazard labeling ; no classification available
GHS hazard labeling ; no classification available
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Europium (III) nitride is a chemical compound and is one of the nitrides of europium .

Extraction and presentation

Europium (III) nitride can be produced through the reaction of elemental europium in a stream of ammonia in corundum boats in silica glass tubes. The reaction takes place at 700 ° C.

{\ displaystyle {\ ce {2 Eu +2 NH3 -> 2 EuN + 3 H2}}}

During this reaction, europium is oxidized and the hydrogen in the ammonia is reduced.

properties

Europium (III) nitride shows Van Vleck paramagnetism and crystallizes in the rock salt structure with a = 501.779 (6) pm. Thin films of rare earth nitrides, including europium (III) nitride, tend to form oxides in the presence of oxygen . The enthalpy of formation of EuN is: Δ H ₀ = 217.6 ± 25.1 k J / mol. The band gap for europium (III) nitride was calculated to be 2.08 eV.

Individual evidence

^ ^A ^b T. Suehiro, N. Hirosaki, T. Wada, Y. Yajima, M. Mitomo,: Europium nitride synthesized by direct nitridation with ammonia . In: Powder Diffraction . tape 20 , 2005, pp. 40-42 , doi : 10.1154 / 1.1835963 .
↑ ^a ^b ^c W. Klemm, G. Winkelmann: On the knowledge of the nitrides of the rare earth metals . In: Journal of Inorganic and General Chemistry . tape 288 , 1956, pp. 87-90 , doi : 10.1002 / zaac.19562880112 .
↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
↑ G. Busch: Influence of crystal fields on the magnetic properties of the rare earth nitrides . In: Physics Letters . tape 14 , no. 4 , 1965, pp. 264-266 , doi : 10.1016 / 0031-9163 (65) 90190-3 .
↑ P. Larson, WRL Lambrecht, A. Chantis, M. van Schilfgaarde: Electronic structure of rare-earth nitrides using the LSDA + U approach: Importance of allowing 4f orbitals to break the cubic crystal symmetry . In: Physical Review B : Condensed Matter and Materials Physics . tape 75 , no. 4 , 2007, p. 045114 / 1–045114 / 14 , doi : 10.1103 / PhysRevB.75.045114 .
^ BJ Ruck, F. Natali, NOV Plank, Binh Do Le, M. Azeem, M. Alfheid, C. Meyer, HJ Trodahl: The influence of nitrogen vacancies on the magnetic behavior of rare-earth nitrides . In: Physica B: Condensed Matter . tape 407 , no. 15 , 2011, p. 2954–2956 , doi : 10.1016 / j.physb.2011.08.004 .
↑ J. Kordis, KA Gingerich, E. Kaldis: Heat of vaporization of europium (II) nitride and its standard heat of formation . In: Journal of the American Ceramic Society . tape 56 , no. 11 , 1973, p. 581-583 , doi : 10.1111 / j.1151-2916.1973.tb12420.x .
↑ N. Sclar: Energy gaps of the III-V and the (rare earth) -V semiconductors . In: Journal of Applied Physics . tape 33 , 1962, ISSN 0021-8979 , pp. 2999-3002 , doi : 10.1063 / 1.1728552 .

[:1-1] A ^b T. Suehiro, N. Hirosaki, T. Wada, Y. Yajima, M. Mitomo,: Europium nitride synthesized by direct nitridation with ammonia . In: Powder Diffraction . tape 20 , 2005, pp. 40-42 , doi : 10.1154 / 1.1835963 .

[:0-2] W. Klemm, G. Winkelmann: On the knowledge of the nitrides of the rare earth metals . In: Journal of Inorganic and General Chemistry . tape 288 , 1956, pp. 87-90 , doi : 10.1002 / zaac.19562880112 .

[NV-3] This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.

[4] G. Busch: Influence of crystal fields on the magnetic properties of the rare earth nitrides . In: Physics Letters . tape 14 , no. 4 , 1965, pp. 264-266 , doi : 10.1016 / 0031-9163 (65) 90190-3 .

[5] P. Larson, WRL Lambrecht, A. Chantis, M. van Schilfgaarde: Electronic structure of rare-earth nitrides using the LSDA + U approach: Importance of allowing 4f orbitals to break the cubic crystal symmetry . In: Physical Review B : Condensed Matter and Materials Physics . tape 75 , no. 4 , 2007, p. 045114 / 1–045114 / 14 , doi : 10.1103 / PhysRevB.75.045114 .

[6] BJ Ruck, F. Natali, NOV Plank, Binh Do Le, M. Azeem, M. Alfheid, C. Meyer, HJ Trodahl: The influence of nitrogen vacancies on the magnetic behavior of rare-earth nitrides . In: Physica B: Condensed Matter . tape 407 , no. 15 , 2011, p. 2954–2956 , doi : 10.1016 / j.physb.2011.08.004 .

[7] J. Kordis, KA Gingerich, E. Kaldis: Heat of vaporization of europium (II) nitride and its standard heat of formation . In: Journal of the American Ceramic Society . tape 56 , no. 11 , 1973, p. 581-583 , doi : 10.1111 / j.1151-2916.1973.tb12420.x .

[8] N. Sclar: Energy gaps of the III-V and the (rare earth) -V semiconductors . In: Journal of Applied Physics . tape 33 , 1962, ISSN 0021-8979 , pp. 2999-3002 , doi : 10.1063 / 1.1728552 .