Chemical elements
    Physical Properties
      Nickel Fluoride
      Nickel Dichloride
      Double Nickel Chlorides
      Nickel Dibromide
      Nickel Di-iodide
      Nickel Chlorate
      Nickel Perchlorate
      Nickel Bromate
      Nickel Iodate
      Tri-nickel Suboxide
      Nickel Suboxide
      Nickel Monoxide
      Nickel Dihydroxide
      Nickelo-nickelic Oxide
      Nickel Dioxide
      Nickel Subsulphide
      Nickel Monosulphide
      Nickel Sesquisulphide
      Tri-nickel Tetrasulphide
      Nickel Disulphide
      Nickel Tetrasulphide
      Nickel Sulphite
      Nickel Thiosulphate
      Nickel Dithionate
      Nickel Sulphate
      Nickel Subselenide
      Nickel Selenide
      Nickel Sesquiselenide
      Nickel Selenite
      Nickel Sesquitelluride
      Nickel Tellurite
      Nickel Chromate
      Nickel Dichromate
      Double Nickel Chromates
      Nickel Molybdate
      Nickel Nitride
      Nickel Azoimide
      Nickel Nitrite
      Nickel Nitrate
      Di-nickel Phosphide
      Nickel Sesquiphosphide
      Nickel Diphosphide
      Nickel Triphosphide
      Nickel Hypophosphite
      Nickel Phosphite
      Nickel Metaphosphate
      Nickel Orthophosphate
      Nickel Pyrophosphate
      Nickel Thio-orthophosphate
      Nickel Thiopyrophosphite
      Nickel Thiopyrophosphate
      Tri-nickel Diarsenide
      Nickel Arsenide
      Nickel Diarsenide
      Nickel Arsenite
      Nickel Orthoarsenate
      Nickel Antimonide
      Nickel Antimonate
      Nickel Thioantimonite
      Nickel Vanadate
      Nickel Carbide
      Nickel Tetracarbonyl
      Nickel Carbonate
      Nickel Monocyanide
      Nickel Cyanide
      Nickel Thiocyanate
      Nickel Thiocarbonate Hexammoniate
      Nickel Subsilicide
      Nickel Orthosilicate
      Nickel Monoboride
      Nickel Borates
    PDB 1a5n-1g2a
    PDB 1g3v-1mn0
    PDB 1mro-1s9b
    PDB 1scr-1xmk
    PDB 1xu1-2cg5
    PDB 2cqz-2jih
    PDB 2jk8-2v4b
    PDB 2vbq-3c2q
    PDB 3c6c-3h85
    PDB 3hdp-3kvb
    PDB 3l1m-3o00
    PDB 3o01-4ubp
    PDB 8icl-9ant

Nickel Nitrate, Ni(NO3)2

Nickelous Nitrate or Nickel Nitrate, Ni(NO3)2 may be obtained in the anhydrous condition by the action of nitric anhydride or a solution of this in nitric acid upon the hydrated salt. It is a pale greenish yellow powder, which decomposes at 105° to 110° C., evolving nitrous fumes.

The hexahydrate, Ni(NO3)2.6H2O, is dimorphous. It is obtained as green monoclinic crystals by concentration of a solution of nickel hydroxide or carbonate in dilute nitric acid at temperatures below 55° C. - most advantageously at about 40° C. Density 2.065 at 14° C. At low temperatures the salt separates out in crystalline lamellae. The crystals deliquesce in moist air and effloresce in the dry. Their solubility in water is as follows:

Temperature ° C-21-12.5-10-60204156.7
Grams Ni(NO3)2 per 100 grams solution.39.9441.5942.1143.0044.3249.0655.2262.76

The composition of a saturated solution of the hexahydrate in water at temperatures ranging from -21° to 41° C. is given by the expression:

Ni(NO3)2 + (12.886 - 0.11355t)H2O.

Crystals of the hexahydrate melt at about 56.7° C., losing 3 molecules of water. If maintained at 70° C. they melt, large orthorhombic crystals of the trihydrate, Ni(NO3)2.3H2O, being produced. This hydrate is stable between c. 55° and 95° C., at which latter temperature the crystals melt with simultaneous decomposition.

The solubility of the trihydrate in water is as follows:

Temperature ° C.586064709095
Grams Ni(NO3)2 per 100 grams solution.61.6161.9962.7663.9570.1677.12

At 55° C. nickel nitrate has nearly the same solubility as the corresponding cobalt salt.

At -16° C. the nonahydrate, Ni(NO3)2.9H2O, can be isolated from the solution, but only with difficulty on account of the low temperature. Its solubility in water is as follows:

Temperature ° C.-23-21-10.5
Grams Ni(NO3)2 per 100 grams solution39.0239.4844.13

The solubility curve of this hydrate intersects that of the hexahydrate at -16° C.

When alcohol is added to a solution of nickel nitrate in aqueous ammonia, blue octahedral crystals of the monohydrated tetrammoniate, Ni(NO3)2.4NH3.H2O, separate out. These are unstable in air.

Double Nickel Nitrates

A double nitrate of nickel and bismuth, 3Ni(NO3)2.2Bi(NO3)3.24H2O, has been prepared as green crystals, melting at 69° C. without decomposition. Other double nitrates are known, including double nitrates of certain rare earth metals, and several basic salts had been prepared.
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