Arsenide nitride

Arsenide nitrides or nitride arsenides are compounds containing anions composed of nitride (N³⁻) and arsenide (As³⁻). They can be considered as mixed anion compounds or mixed pnictide compounds. Related compounds include the arsenide phosphides, germanide arsenides, arsenide carbides, and phosphide nitrides.

Cubic Mg₃AsN, orthorhombic Ca₃AsN Sr₃AsN and Ba₃AsN showing increased distortion as alkaline earth metal increases in size.

Arsenide and nitride are quite different in size, so alloys are challenging to produce.^[1] They can be produced by heating an arsenide compound with a nitride, under pressure so that nitrogen does not escape.

List

name	formula	crystal system	space group	unit cell Å	volume	density	comment	ref
	Mg3AsN	cubic	Pm3m	a =4.2148 Z=1	74.88	3.589	orange	[2]
	Ca3AsN	orthorhombic	Pbnm	a=6.725 b=6.7198 c=9.5335 Z=4	430.8	3.237	red; moisture sensitive	[3]
	Ca14As6C0.445N1.135H4.915		P4/mbm	a = 15.749 c = 9.1062			red; band gap 1.6 eV	[4]
	Cr3AsN	tetragonal	I4/mcm	a=5.360 c=8.066				[5][6]
gallium arsenide nitride	Ga(As,N)
indium gallium arsenide nitride	(In,Ga)(As,N)
aluminium gallium arsenide nitride	(Al,Ga)(As,N)
	Sr3AsN	orthorhombic	Pbnm	a=7.1856 b=10.1446 c=7.1464 Z=4	520.93	4.486	dark grey	[2]
	Ba3AsN	orthorhombic	Pbnm	a=7.6741 b=10.7573 c=7.5387 Z=4	622.33	5.347	black	[2]
	LaFe2AsN	orthorhombic	Cmcm	a =3.79932 b =11.11461 c =7.18656	303.474			[7]
	LaCo2AsN	orthorhombic	Cmcm	a =3.75993 b =11.1674 c =7.0185	294699			[7]
	LaNi2AsN	orthorhombic	Cmcm	a =3.71584 b =11.4147 c =6.9786	296.004			[7]
	Th2ONAs		P3m1	a=4.041 c=6.979				[8]
	ThCrAsN						metallic	[9]
	ThMnAsN	tetragonal	P4/nmm	a =4.0818 b =4.0818 c =8.947			metallic	[10]
	ThFeAsN	tetragonal	P4/nmm	a = 4.0367 c = 8.5262			superconductor Tc 30 K	[11]
	ThFe1−xCoxAsN						superconductivity lost for x>0.05	[12]
	ThNiAsN	tetragonal	P4/nmm	a=4,0804 c=7.9888			superconductor at 4.3K	[13]
	BaTh2Fe4As4(N0.7O0.3)2			a=3.9886 c=29.853			Tc 22K	[14]
	U2N2As		P3m1	a=3.833 c=6.737				[8]