Nickel ternary chalcogenides

The nickel ternary chalcogenides are a class of chemical compounds that contain nickel, one other metallic element, and a chalcogenide. Nickel combined with another metal and oxygen forms a series of double nickel oxides which are referred to as "nickelates" or, more precisely, "oxonickelates". This page lists the many other well-defined double compounds of nickel with sulfur, selenium and tellurium; double nickel oxides are listed elsewhere.

formula	name	colour	structure	production	references
NH4NiS5	ammonium nickel sulphide	black		NH4 polysulfide+NiSO4	[1][2]
K2Ni3S4	potassium nickel tetrasulfide	bronze yellow	Fddd a=10.023 b=26.074 c=5.704	NiSO4 K2CO3 S	[1][3][4]
K2Ni11S10	potassium nickel decasulfide	dark metallic green		NiO+KCNS	[1] J. Milbauer
Na2Ni3S4	sodium nickel tetrasulfide	dark yellow		NiSO4 Na2CO3 S	[1] R. Schneider
KNi2S2	potassium dinickel disulfide	orange yellow		Ni foil, S, K at 723K	[5][6]
K2Ni3Se4	potassium nickel tetraselenide	gold	Fddd a=10.468 b=26.496 c=5.995		[7][8]
KNi2Se2	potassium dinickel diselenide	purple-red	I4/mmmtetragonal a=3.909, c=13.4142	Ni foil, Se shot, K at 723K	[5][9]
CsNi2Se2	caesium dinickel diselenide		tetragonal a=3.988, c=14.419	heat elements	[10]
TlNi2Se2	Thallium dinickel diselenide	gold metallic	tetragonal	heat elements together in closed quartz tube	[11]
Rb2Ni3S4	rubidium nickel tetrasulphide	metallic greenish gold	Fmmm orthorhombic a=9.901 Å, b=13.606 Å and c=5.861 Z=4 layered; ferromagnetic only after water immersion		[7][12]
Rb2Ni3Se4	rubidium nickel tetraselenide	golden metallic	Fddd orthorhombic a = 10.555 Å, b = 27.588 Å, c = 6.031 Å, Z = 8 layered; ferromagnetic only after water immersion	Rb2CO3 S Ni	[13]
Cs2Ni3S4	cesium nickel tetrasulphide	greenish gold	Fmmm a=10.038 b=14.552 c=5.934		[8][13]
Cs2Ni3S4	cesium nickel tetrasulphide	gold	Fmmm a=10.540 b=14.624 c=6.194		[8]
Cs0.9Ni3.1Se3			Hexagonal P63/m a = 9.26301(4) Å and c = 4.34272(2) Å	quasi-one-dimensional electric conductor	[14]
BaNi4S5	Barium nickel pentasulfide	bronze yellow		NiSO4 K2CO3 S	[1] R. Schneider; I. and L. Bellucci
Pb2Ni3S2	lead nickel disulfide	melt 790°		PbS Ni	[15] W Guertler; W Guertler H Schack
(Ni,Fe)9S8	Pentlandite	bronze yellow melt 870			[15] T. Scheerer
Fe2Ni2S4	ferrous nickel tetrasulfide	melt 840			[16] K Bornemann
Fe2Ni2S3	ferrous nickel trisulfide	stable over 575°, melt 886,			[17] K Bornemann
Fe3Ni4S5	ferrous nickel pentasulfide			below 575	[17] K Bornemann
Fe4Ni2S5					[17] K Bornemann
Fe2Ni3S4					[17] K Bornemann
Fe3Ni4S5					[17] K Bornemann
Fe2Ni2S3					[17] K Bornemann
FeNi2S4	Violarite	dark violet grey		mineral oxidate
Ni3Sn2S2					[18]
Ni3Bi2S2				superconducting	[18]
Ni3Bi2Se2				superconducting	[18]
NiSnS3	nickel thiostannate	greenish black	orthorhombic a=6.88 b=7.89 c=11.95 Z=8 V=644	NiCl2 + SnS2	[19]
NiGeS33	nickelselenogermanate				[20]
Ta2NiS5			Orthorhombic		[21]
Ta2NiSe5			monoclinic β=90.53		[21]
Ta2Ni2Te4					[22]
Ta2Ni3Te5					[22]