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
K₂Ni₃S₄	potassium nickel tetrasulfide	bronze yellow	Fddd a=10.023 b=26.074 c=5.704	NiSO₄ K₂CO₃ S
K₂Ni₁₁S₁₀	potassium nickel decasulfide	dark metallic green		NiO+KCNS	J. Milbauer
Na₂Ni₃S₄	sodium nickel tetrasulfide	dark yellow		NiSO₄ Na₂CO₃ S	R. Schneider
KNi₂S₂	potassium dinickel disulfide	orange yellow		Ni foil, S, K at 723K
K₂Ni₃Se₄	potassium nickel tetraselenide	gold	Fddd a=10.468 b=26.496 c=5.995
KNi₂Se₂	potassium dinickel diselenide	purple-red	I4/mmmtetragonal a=3.909, c=13.4142	Ni foil, Se shot, K at 723K
CsNi₂Se₂	caesium dinickel diselenide		tetragonal a=3.988, c=14.419	heat elements
TlNi₂Se₂	Thallium dinickel diselenide	gold metallic	tetragonal	heat elements together in closed quartz tube
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
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
Cs₂Ni₃S₄	cesium nickel tetrasulphide	greenish gold	Fmmm a=10.038 b=14.552 c=5.934
Cs₂Ni₃S₄	cesium nickel tetrasulphide	gold	Fmmm a=10.540 b=14.624 c=6.194
Cs_0.9Ni_3.1Se₃			Hexagonal P6₃/m a = 9.26301 Å and c = 4.34272 Å	quasi-one-dimensional electric conductor
BaNi₄S₅	Barium nickel pentasulfide	bronze yellow		NiSO₄ K₂CO₃ S	R. Schneider; I. and L. Bellucci
Pb₂Ni₃S₂	lead nickel disulfide	melt 790°		PbS Ni	W Guertler; W Guertler H Schack
₉S₈	Pentlandite	bronze yellow melt 870			T. Scheerer
Fe₂Ni₂S₄	ferrous nickel tetrasulfide	melt 840			K Bornemann
Fe₂Ni₂S₃	ferrous nickel trisulfide	stable over 575°, melt 886,			K Bornemann
Fe₃Ni₄S₅	ferrous nickel pentasulfide			below 575	K Bornemann
Fe₄Ni₂S₅					K Bornemann
Fe₂Ni₃S₄					K Bornemann
Fe₃Ni₄S₅					K Bornemann
Fe₂Ni₂S₃					K Bornemann
FeNi₂S₄	Violarite	dark violet grey		mineral oxidate
Ni₃Sn₂S₂
Ni₃Bi₂S₂				superconducting
Ni₃Bi₂Se₂				superconducting
NiSnS₃	nickel thiostannate	greenish black	orthorhombic a=6.88 b=7.89 c=11.95 Z=8 V=644	NiCl₂ + SnS₂
NiGeS3₃	nickelselenogermanate
Ta₂NiS₅			Orthorhombic
Ta₂NiSe₅			monoclinic β=90.53
Ta₂Ni₂Te₄
Ta₂Ni₃Te₅