page_title: Nickel selenide
hierarchical_section_title: Nickel selenide
context_page_description: Nickel selenide is the inorganic compound with the formula NiSe. As for many metal chalcogenides, the phase diagram for nickel(II) selenide is complicated. Two other selenides of nickel are known, NiSe₂ with a pyrite structure, and Ni₂Se₃. Additionally, NiSe is usually nonstoichiometric and is often described with the formula Ni1−xSe, with 0 < x <0.15. This material is a semi-conducting solid, and can be obtained as in the form of a black fine powder, or silver if obtained in the form of larger crystals. Nickel(II) selenide is insoluble in all solvents, but can be degraded by strongly oxidizing acids.
context_section_description: Nickel selenide is the inorganic compound  with the formula NiSe.  As for many metal chalcogenides, the phase diagram for nickel(II) selenide is complicated.  Two other selenides of nickel are known, NiSe₂ with a pyrite structure, and Ni₂Se₃. Additionally, NiSe is usually nonstoichiometric and is often described with the formula Ni1−xSe, with 0 < x <0.15.  This material is a semi-conducting solid, and can be obtained as in the form of a black fine powder, or silver if obtained in the form of larger crystals.  Nickel(II) selenide is insoluble in all solvents, but can be degraded by strongly oxidizing acids.
caption: Stoichiometric NiSe:      Ni      Se
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