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.
formulanamecolourstructureproductionreferencesNH4NiS5ammonium nickel sulphideblackNH4 polysulfide+NiSO4K2Ni3S4potassium nickel tetrasulfidebronze yellowFddd a=10.023 b=26.074 c=5.704NiSO4 K2CO3 SK2Ni11S10potassium nickel decasulfidedark metallic greenNiO+KCNSMellor p443 J. MilbauerNa2Ni3S4sodium nickel tetrasulfidedark yellowNiSO4 Na2CO3 S R. SchneiderKNi2S2potassium dinickel disulfideorange yellowNi foil, S, K at 723KK2Ni3Se4potassium nickel tetraselenidegoldFddd a=10.468 b=26.496 c=5.995KNi2Se2potassium dinickel diselenidepurple-redI4/mmmtetragonal a=3.909, c=13.4142Ni foil, Se shot, K at 723KCsNi2Se2caesium dinickel diselenidetetragonal a=3.988, c=14.419heat elementsTlNi2Se2Thallium dinickel diselenidegold metallictetragonalheat elements together in closed quartz tubeRb2Ni3S4rubidium nickel tetrasulphidemetallic greenish goldFmmm orthorhombic a=9.901 Å, b=13.606 Å and c=5.861 Z=4 layered; ferromagnetic only after water immersionRb2Ni3Se4rubidium nickel tetraselenidegolden metallicFddd orthorhombic a = 10.555 Å, b = 27.588 Å, c = 6.031 Å, Z = 8 layered; ferromagnetic only after water immersionRb2CO3 S NiCs2Ni3S4cesium nickel tetrasulphidegreenish goldFmmm a=10.038 b=14.552 c=5.934Cs2Ni3S4cesium nickel tetrasulphidegoldFmmm a=10.540 b=14.624 c=6.194Cs0.9Ni3.1Se3Hexagonal P63/m a = 9.26301(4) Å and c = 4.34272(2) Åquasi-one-dimensional electric conductorBaNi4S5Barium nickel pentasulfidebronze yellowNiSO4 K2CO3 S R. Schneider; I. and L. BellucciPb2Ni3S2lead nickel disulfidemelt 790°PbS NiMellor p444 W Guertler; W Guertler H Schack(Ni,Fe)9S8Pentlanditebronze yellow melt 870 T. ScheererFe2Ni2S4ferrous nickel tetrasulfidemelt 840Mellor p445 K BornemannFe2Ni2S3ferrous nickel trisulfidestable over 575°, melt 886, Mellor p446 K BornemannFe3Ni4S5ferrous nickel pentasulfidebelow 575 K BornemannFe4Ni2S5 K BornemannFe2Ni3S4 K BornemannFe3Ni4S5 K BornemannFe2Ni2S3 K BornemannFeNi2S4Violaritedark violet grey mineral oxidateNi3Sn2S2Ni3Bi2S2superconductingNi3Bi2Se2superconductingNiSnS3nickel thiostannategreenish blackorthorhombic a=6.88 b=7.89 c=11.95 Z=8 V=644NiCl2 + SnS2NiGeS33nickelselenogermanateTa2NiS5Orthorhombic Ta2NiSe5monoclinic β=90.53Ta2Ni2Te4Ta2Ni3Te5
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