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  2. Nickel(II) sulfate - Wikipedia

    en.wikipedia.org/wiki/Nickel(II)_sulfate

    Nickel(II) sulfate, or just nickel sulfate, usually refers to the inorganic compound with the formula NiSO 4 (H 2 O) 6. This highly soluble turquoise coloured salt is a common source of the Ni 2+ ion for electroplating .

  3. Nickel compounds - Wikipedia

    en.wikipedia.org/wiki/Nickel_compounds

    A binary compound of nickel contains one other element. Substances that contain only nickel atoms are not actually compounds. In a noble gas matrix, nickel can form dimers, a molecule with two nickel atoms: Ni 2. [1] Ni 2 has a bonding energy of 2.07±0.01 eV. For Ni 2 + the bond energy is around 3.3 eV. Nickel dimers and other clusters can ...

  4. Glossary of chemical formulae - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_chemical_formulae

    This is a list of common chemical compounds with chemical formulae and CAS numbers, indexed by formula. This complements alternative listing at list of inorganic compounds. There is no complete list of chemical compounds since by nature the list would be infinite.

  5. Nickel sulfide - Wikipedia

    en.wikipedia.org/wiki/Nickel_sulfide

    Nickel sulfide is any inorganic compound with the formula Ni x S y. These compounds range in color from bronze (Ni 3 S 2) to black (NiS 2). The nickel sulfide with simplest stoichiometry is NiS, also known as the mineral millerite. From the economic perspective, Ni 9 S 8, the mineral pentlandite, is the chief source of mined nickel.

  6. Color of chemicals - Wikipedia

    en.wikipedia.org/wiki/Color_of_chemicals

    Lycopene is a classic example of a compound with extensive conjugation (11 conjugated double bonds), giving rise to an intense red color (lycopene is responsible for the color of tomatoes). Charge-transfer complexes tend to have very intense colors for different reasons.

  7. Nickel double salts - Wikipedia

    en.wikipedia.org/wiki/Nickel_double_salts

    The known salts include (NH 4) 2 Ni 2 (SO 4) 3, K 2 Ni 2 (SO 4) 3 and Rb 2 Ni 2 (SO 4) 3, and those of Tl and Cs are predicted to exist. Some minerals are double salts, for example Nickelzippeite Ni 2 (UO 2 ) 6 (SO 4 ) 3 (OH) 10 · 16H 2 O which is isomorphic to cobaltzippeite , magnesiozippeite and zinczippeite , part of the zippeite group.

  8. Nickel (II) carbonate - Wikipedia

    en.wikipedia.org/wiki/Nickel(II)_carbonate

    NiCO 3 → NiO + CO 2. The nature of the resulting oxide depends on the nature of the precursor. The oxide obtained from the basic carbonate is often most useful for catalysis. Basic nickel carbonate can be made by treating solutions of nickel sulfate with sodium carbonate: 4 Ni 2+ + CO 2− 3 + 6 OH − + 4 H 2 O → Ni 4 CO 3 (OH) 6 (H 2 O) 4

  9. Oxalatonickelate - Wikipedia

    en.wikipedia.org/wiki/Oxalatonickelate

    The oxalatonickelates are a class of compounds that contain nickel complexed by oxalate groups. They form a series of double salts , and include clusters with multiple nickel atoms. Since oxalate functions as a bidentate ligand it can satisfy two coordinate positions around the nickel atom, or it can bridge two nickel atoms together.