Nickel-ammonium sulfate

Nickel-ammonium sulfate ;
Names:	nickel ammonium sulfate; nickel Tutton's salt; ammonium nickel schoenite; ammonium nickelous sulfate; ANiSH; ANSH;
Formula:	(NH4)2Ni(SO4)2 (anhydrous); (NH4)2Ni(SO4)2 · 6H2O (hexahydrate);
Molar mass:	286.893 g/mol (anhydrous); 394.982 g/mol (hexahydrate);
Density:	1.923 g/cm3 (hexahydrate);
Crystal system:	monoclinic (hexahydrate); a=6.244 Å, b=12.469 Å, c=9.195 Åα=90°, β=106.98°, γ=90°;
Shapes:	https://en.crystalls.info/w/uploads/media/d/d0/Truncated_deformed_oblique_hexagonal_prism.json Truncated deformed oblique hexagonal prism https://en.crystalls.info/w/uploads/media/9/9a/Truncated_deformed_hexagonal_prism.json Truncated deformed hexagonal prism ;
Color:	green; blue-green;
Refractive index:	1.5007 (hexahydrate);
Optical properties:	pleochroism;
Stability:	stable (hexahydrate)

Description

Inorganic compound, double salt of transitional metal nickel, ammonium ion and inorganic sulfuric acid. From water solutions crystallizes as hexahydrate.

Minerals

Occurs in nature as nickelboussingaultite mineral.

Precursors

Reaction between nickel and ammonium sulfates

Chemical equation:

(NH₄)₂SO₄ + NiSO₄ = (NH₄)₂Ni(SO₄)₂↓

For preparation of 100.00g of nickel-ammonium sulfate

hexahydratehexahydrate
anhydrous

а 71.11g of nickel sulfate

heptahydrateheptahydrate
hexahydrate
monohydrate
anhydrous

and 33.45g of ammonium sulfate is required.

Dissolve compounds in hot water apart and then mix solutions into one container with intense stirring. Cooling or evaporation of a solution will cause double salt crystallyzation. Filter precipitate and wash it wish small amount of ethanol or acetone, then filter the solution and use it for crystal growing.

Influence of impurities

Excess of one of sulfates leads to changing a shape of the final crystal. Excess of potassium sulfate makes crystals cloudy/opaque. Small addition of zinc-potassium sulfate or magnesium-potassium sulfate changes crystal color to a lighter one. Compound could be mixed with Tutton's salts in any proportion, producing crystals with different colors and sometimes shapes. It is also possible to cover crystals with a layer of other Tutton's salt, e.g. by placing the crystal into s saturated solution of other salt, producing a crystal-in-crystal.

Influence of pH level

Addition of surfactants has a positive influence on crystal shape and transparency. For example, addition of soap containing sodium lauryl sulfate makes crystal transparent and sharp-edged. Same effect can be achieved by addition of baking soda (~1g of per 100g of solution) - a precipitate containing impurities is formed (e.g. iron salts), solution should be left intact for a while, and then filtered.

Storage conditions

Keep in its original form or under several layers of varnish at average humidity and room temperature. Do not keep crystals near heaters.

Solubility

TableGraph

Temperature	g/`100,00` g water
Temperature	(anhydrous)	(hexahydrate)
0°C273.15 K <br />32 °F <br />491.67 °R <br />	`1.6`
10°C283.15 K <br />50 °F <br />509.67 °R <br />	`4`
20°C293.15 K <br />68 °F <br />527.67 °R <br />	`6.5`	`10.4`
70°C343.15 K <br />158 °F <br />617.67 °R <br />	`21.8`
80°C353.15 K <br />176 °F <br />635.67 °R <br />		`29.8`

Insoluble in ethanol and acetone.

Gallery

Nickel-ammonium sulfateStanislav Popov, VKontakteStanislav PopovVKontakte
Nickel-ammonium sulfateStanislav Popov, VKontakteStanislav PopovVKontakte
Grown during 1 yearNickel-ammonium sulfate, Julas xZiom, reddit, VKontakteJulas xZiomReddit, VKontakte
Grown during 1 yearNickel-ammonium sulfate, Julas xZiom, reddit, VKontakteJulas xZiomReddit, VKontakte
Grown during 1 yearNickel-ammonium sulfate, Julas xZiom, reddit, VKontakteJulas xZiomReddit, VKontakte
1:1 mixture of nickel-ammonium and zinc-ammonium sulfatesNickel-ammonium sulfate, Stanislav Popov, VKontakteStanislav PopovVKontakte
Crystals of zinc-ammonium sulfate with 10% addition of nickel-ammonium sulfateZinc-ammonium sulfate, Rostislav Dolgikh, VKontakteRostislav DolgikhVKontakte
Nickel-ammonium sulfate without any additivesNickel-ammonium sulfate, Vladimir Semikin, VKontakteVladimir SemikinVKontakte
Nickel-ammonium sulfate with addition of few drops of soap (containing sodium lauryl sulfate sulfactant)Nickel-ammonium sulfate, Vladimir Semikin, VKontakteVladimir SemikinVKontakte

Video

Sources

Sulfates
Simple	Aluminum sulfate (Al₂(SO₄)₃) • Ammonium sulfate ((NH₄)₂SO₄) • Calcium sulfate (CaSO₄) • Cadmium sulfate (CdSO₄) • Cerium(III) sulfate (Ce₂(SO₄)₃) • Cerium(IV) sulfate (Ce(SO₄)₂) • Chromium(III) sulfate (Cr₂(SO₄)₃) • Cobalt(II) sulfate (CoSO₄) • Copper(II) sulfate (CuSO₄) • Gadolinium sulfate (Gd₂(SO₄)₃) • Holmium sulfate (Ho₂(SO₄)₃) • Hydrazine sulfate (N₂H₄ · H₂SO₄) • Iron(II) sulfate (FeSO₄) • Iron(III) sulfate (Fe₂(SO₄)₃) • Lanthanum sulfate (La₂(SO₄)₃) • Lithium sulfate (Li₂SO₄) • Magnesium sulfate (MgSO₄) • Manganese(II) sulfate (MnSO₄) • Neodymium sulfate (Nd₂(SO₄)₃) • Nickel sulfate (NiSO₄) • Potassium sulfate (K₂SO₄) • Praseodymium(III) sulfate (Pr₂(SO₄)₃) • Rubidium sulfate (Rb₂SO₄) • Sodium hydrosulfate (NaHSO₄) • Sodium sulfate (Na₂SO₄) • Yttrium sulfate (Gd₂(SO₄)₃) • Zinc sulfate (ZnSO₄)
Alums	Aluminum-ammonium sulfate (NH₄Al(SO₄)₂) • Aluminum-potassium sulfate (KAl(SO₄)₂) • Chromium(III)-ammonium sulfate (NH₄Cr(SO₄)₂) • Chromium(III)-potassium sulfate (KCr(SO₄)₂) • Cobalt(III)-ammonium sulfate (NH₄Co(SO₄)₂) • Indium(III)-potassium sulfate (KIn(SO₄)₂) • Iron(III)-ammonium sulfate (NH₄Fe(SO₄)₂) • Iron(III)-potassium sulfate (KFe(SO₄)₂) • Manganese(III)-ammonium sulfate (NH₄Mn(SO₄)₂) • Vanadium(III)-ammonium sulfate (NH₄V(SO₄)₂)
Tutton's salts	Chromium(II)-ammonium sulfate ((NH₄)₂Cr(SO₄)₂) • Cobalt(II)-ammonium sulfate ((NH₄)₂Co(SO₄)₂) • Cobalt(II)-potassium sulfate (K₂Co(SO₄)₂) • Copper(II)-ammonium sulfate ((NH₄)₂Cu(SO₄)₂) • Copper(II)-potassium sulfate (K₂Cu(SO₄)₂) • Iron(II)-ammonium sulfate ((NH₄)₂Fe(SO₄)₂) • Iron(II)-potassium sulfate (K₂Fe(SO₄)₂) • Magnesium-ammonium sulfate ((NH₄)₂Mg(SO₄)₂) • Magnesium-potassium sulfate (K₂Mg(SO₄)₂) • Magnesium-potassium sulfate-chromate (K₂CrO₄ · MgSO₄) • Manganese(II)-ammonium sulfate ((NH₄)₂Mn(SO₄)₂) • Manganese(II)-potassium sulfate (K₂Mn(SO₄)₂) • Nickel-ammonium sulfate ((NH₄)₂Ni(SO₄)₂) • Nickel-potassium sulfate (K₂Ni(SO₄)₂) • Vanadium(II)-ammonium sulfate ((NH₄)₂V(SO₄)₂) • Zinc-ammonium sulfate ((NH₄)₂Zn(SO₄)₂) • Zinc-potassium sulfate (K₂Zn(SO₄)₂)
Double salts	Copper(II)-iron(II) sulfate ((Cu,Fe)SO₄) • Iron(II)-magnesium sulfate ((Fe,Mg)SO₄) • Lithium-potassium sulfate (KLiSO₄) • Sodium-ammonium sulfate (NaNH₄SO₄) • Zinc-sodium sulfate (Na₂Zn(SO₄)₂)
Adducts	Triglycine sulfate ((NH₂CH₂COOH)₃ · H₂SO₄) • Glutamic acid sulfate (C₅H₉NO₄ · H₂SO₄)
Complexes	Cerium(III) sulfocerate(IV) (Ce₄[Ce(SO₄)₄]₃) • Glycinecopper(II) sulfate ([Cu(NH₂CH₂COOH)]SO₄) • Hexakarbamatzinc sulfate ([(CON₂H₄)₆Zn]SO₄) • Tetraamminecopper(II) sulfate ([Cu(NH₃)₄]SO₄) • Tris(hydroxymethil)methanoaminecopper(II) sulfate ([Cu(NH₂C(CH₂OH)₃)₄]SO₄)

Ammonium compounds
Salts	Ammonium citrate ((NH₄)₃C₃H₅O(COO)₃) • Ammonium chloride (NH₄Cl) • Ammonium dichromate ((NH₄)₂Cr₂O₇) • Ammonium dihydrophosphate (NH₄H₂PO₄) • Ammonium nitrate (NH₄NO₃) • Ammonium perrhenate (NH₄ReO₄) • Ammonium sulfate ((NH₄)₂SO₄) • Ammonium succinate ((NH₄)₂C₄H₄O₄) • Ammonium tetraborate ((NH₄)₂B₄O₇) • Ammonium thiocyanate (NH₄NCS)
Double salts	Aluminum-ammonium sulfate (NH₄Al(SO₄)₂) • Calcium-ammonium nitrate (5Ca(NO₃)₂ · NH₄NO₃) • Chromium(II)-ammonium sulfate ((NH₄)₂Cr(SO₄)₂) • Chromium(III)-ammonium sulfate (NH₄Cr(SO₄)₂) • Cobalt(II)-ammonium sulfate ((NH₄)₂Co(SO₄)₂) • Cobalt(III)-ammonium sulfate (NH₄Co(SO₄)₂) • Copper(II)-ammonium sulfate ((NH₄)₂Cu(SO₄)₂) • Iron(II)-ammonium sulfate ((NH₄)₂Fe(SO₄)₂) • Iron(III)-ammonium sulfate (NH₄Fe(SO₄)₂) • Magnesium-ammonium sulfate ((NH₄)₂Mg(SO₄)₂) • Manganese(II)-ammonium sulfate ((NH₄)₂Mn(SO₄)₂) • Manganese(III)-ammonium sulfate (NH₄Mn(SO₄)₂) • Nickel-ammonium sulfate ((NH₄)₂Ni(SO₄)₂) • Sodium-ammonium sulfate (NaNH₄SO₄) • Vanadium(II)-ammonium sulfate ((NH₄)₂V(SO₄)₂) • Vanadium(III)-ammonium sulfate (NH₄V(SO₄)₂) • Zinc-ammonium sulfate ((NH₄)₂Zn(SO₄)₂)
Complexes	Ammines • Ammonium dioxalatocuprate(II) ((NH₄)₂[Cu(C₂O₄)₂]) • Ammonium pentachloroferrate(III) ((NH₄)₂[FeCl₅]) • Ammonium tetrachlorocuprate(II) ((NH₄)₂[CuCl₄]) • Ammonium trioxalatoferrate(III) ((NH₄)₃[Fe(C₂O₄)₃])

Nickel compounds
Salts	Nickel (Ni) • Nickel acetate (Ni(CH₃COO)₂) • Nickel nitrate (Ni(NO₃)₂) • Nickel sulfate (NiSO₄) • Nickel tartrate (NiC₄H₄O₆)
Double salts	Nickel-ammonium sulfate ((NH₄)₂Ni(SO₄)₂) • Nickel-potassium sulfate (K₂Ni(SO₄)₂)
Complexes	Hexaamminenickel chloride ([Ni(NH₃)₆]Cl₂) • Tris(ethylenediamine)nickel(II) oxalate ([Ni(H₂NCH₂CH₂NH₂)₃]C₂O₄)

Nickel-ammonium sulfate
Names:	nickel ammonium sulfate nickel Tutton's salt ammonium nickel schoenite ammonium nickelous sulfate ANiSH ANSH
Formula:	(NH₄)₂Ni(SO₄)₂ (anhydrous) (NH₄)₂Ni(SO₄)₂ · 6H₂O (hexahydrate)
Molar mass:	286.893 g/mol (anhydrous) 394.982 g/mol (hexahydrate)
Density:	1.923 g/cm³ (hexahydrate)
Crystal system:	monoclinic (hexahydrate) a=6.244 Å, b=12.469 Å, c=9.195 Åα=90°, β=106.98°, γ=90°
Shapes:	Truncated deformed oblique hexagonal prism Truncated deformed hexagonal prism
Color:	green blue-green
Refractive index:	1.5007 (hexahydrate)
Optical properties:	pleochroism
Stability:	stable (hexahydrate)