Magnesium-ammonium sulfate

Magnesium-ammonium sulfate ;
Names:	diammonium-magnesium sulfate; magnesium-ammonium Tutton's salt; magnesium-ammonium schoenite; AMSH; AMgSH;
Formula:	(NH4)2Mg(SO4)2 (anhydrous); (NH4)2Mg(SO4)2 · 6H2O (hexahydrate);
Molar mass:	252.505 g/mol (anhydrous); 360.594 g/mol (hexahydrate);
Density:	1.723 g/cm3 (hexahydrate);
Crystal system:	monoclinic (hexahydrate); a=9.383 Å, b=12.669 Å, c=6.220 Åα=90°, β=107.05°, γ=90°;
Shapes:	Template:Rhombohedron 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:	colorless; white;
Refractive index:	1.472 (hexahydrate);
Stability:	stable (hexahydrate); hygroscopic (anhydrous);
Toxicity:	non-toxic

Description

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

Minerals

Occurs in nature as boussingaultite mineral.

Precursors

Reaction between magnesium and ammonium sulfates

Chemical equation:

(NH₄)₂SO₄ + MgSO₄ = (NH₄)₂Mg(SO₄)₂↓

For preparation of 100.00g of magnesium-ammonium sulfate

hexahydratehexahydrate
anhydrous

а 68.35g of magnesium sulfate

heptahydrateheptahydrate
anhydrous

and 36.64g 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.

Reaction between ammonium sulfate and magnesium chloride

Chemical equation:

2(NH₄)₂SO₄ + 2MgCl = (NH₄)₂Mg(SO₄)₂↓ + 2KCl

For preparation of 100.00g of magnesium-ammonium sulfate

hexahydratehexahydrate
anhydrous

а 73.29g 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. For purifying compound from unreacted compounds add large amount of cold ethanol or acetone to solution, salt will settle to the bottom in the form of fine crystals or powder. Filter precipitate and wash it with small amount of the same solvent, then filter the solution and use it for crystal growing.

Influence of impurities

Small addition (~10%) of Tutton's salts, like nickel-ammonium sulfate, cobalt(II)-ammonium sulfate, copper(II)-ammonium sulfate or magnesium-ammonium chromate can be used to change color of crystals. Adding large amounts of those sales may change crystal shape. It is also possible to cover crystals with a layer of other Tutton's salts, by placing the crystals into s saturated solution of other salt, producing a crystal-in-crystal.

Temperature	гр/`100,00` гр water
22°C295.15 K <br />71.6 °F <br />531.27 °R <br />	`18.0`
100°C373.15 K <br />212 °F <br />671.67 °R <br />	`66.0`

Gallery

Magnesium-ammonium sulfateManzana cristal, twitterManzana cristalTwitter
Magnesium-ammonium sulfateEugene Dudko, VKontakteEugene DudkoVKontakte
Addition of ~5-10% cobalt(II)-ammonium sulfate and magnesium-ammonium chromateMagnesium-ammonium sulfate, Vladimir Semikin, VKontakteVladimir SemikinVKontakte
Crystal-in-crystal. The core is grown from a solution with small addition of magnesium-ammonium chromate, then it was placed to solution with small addition of both magnesium-ammonium chromate and cobalt(II)-ammonium sulfateMagnesium-ammonium sulfate, Vladimir Semikin, VKontakteVladimir SemikinVKontakte
Addition of ~5-10% copper(II)-ammonium sulfate and magnesium-ammonium chromateMagnesium-ammonium sulfate, Vladimir Semikin, VKontakteVladimir SemikinVKontakte
Addition of other shoenites, ~5-10%. Blue - addition of copper(II)-ammonium sulfate. Green - addition of copper(II)-ammonium sulfate and magnesium-ammonium chromate. Yellow - addition of magnesium-ammonium chromate. Rew - addition of cobalt(II)-ammonium sulfate. Orange - addition of cobalt(II)-ammonium sulfate and magnesium-ammonium chromate.Magnesium-ammonium sulfate, Vladimir Semikin, VKontakteVladimir SemikinVKontakte
Addition of other shoenites, ~5-10%. Blue - addition of copper(II)-ammonium sulfate. Green - addition of copper(II)-ammonium sulfate and magnesium-ammonium chromate. Yellow - addition of magnesium-ammonium chromate. Rew - addition of cobalt(II)-ammonium sulfate. Orange - addition of cobalt(II)-ammonium sulfate and magnesium-ammonium chromate.Magnesium-ammonium sulfate, Vladimir Semikin, VKontakteVladimir SemikinVKontakte
Addition of other shoenites, ~5-10%. Blue - addition of copper(II)-ammonium sulfate. Green - addition of copper(II)-ammonium sulfate and magnesium-ammonium chromate. Yellow - addition of magnesium-ammonium chromate. Rew - addition of cobalt(II)-ammonium sulfate. Orange - addition of cobalt(II)-ammonium sulfate and magnesium-ammonium chromate.Magnesium-ammonium sulfate, Vladimir Semikin, VKontakteVladimir SemikinVKontakte
Mix of magnesium-ammonium and cobalt(II)-ammonium sulfates with ration 5:1Magnesium-ammonium sulfate, Manzana cristal, twitterManzana cristalTwitter

Video

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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])

Magnesium compounds
Salts	Magnesium hydrocarbonate (Mg(HCO₃)₂) • Magnesium sulfamate (Mg(NH₂SO₃)₂) • Magnesium sulfate (MgSO₄)
Double salts	Iron(II)-magnesium sulfate ((Fe,Mg)SO₄) • Magnesium-ammonium sulfate ((NH₄)₂MgSO₄) • Magnesium-potassium sulfate (K₂MgSO₄) • Magnesium-potassium sulfate-chromate (K₂CrO₄ · MgSO₄)

Magnesium-ammonium sulfate
Names:	diammonium-magnesium sulfate magnesium-ammonium Tutton's salt magnesium-ammonium schoenite AMSH AMgSH
Formula:	(NH₄)₂Mg(SO₄)₂ (anhydrous) (NH₄)₂Mg(SO₄)₂ · 6H₂O (hexahydrate)
Molar mass:	252.505 g/mol (anhydrous) 360.594 g/mol (hexahydrate)
Density:	1.723 g/cm³ (hexahydrate)
Crystal system:	monoclinic (hexahydrate) a=9.383 Å, b=12.669 Å, c=6.220 Åα=90°, β=107.05°, γ=90°
Shapes:	Template:Rhombohedron Truncated deformed oblique hexagonal prism Truncated deformed hexagonal prism
Color:	colorless white
Refractive index:	1.472 (hexahydrate)
Stability:	stable (hexahydrate) hygroscopic (anhydrous)
Toxicity:	non-toxic