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Manganese(II)-ammonium sulfate

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   Manganese(II)-ammonium sulfate   
Names: Manganese ammonium sulfate
Manganese Tutton's salt
ammonium manganese schoenite
AMnSH
AMSH
Formula: (NH4)2Mn(SO4)2 (anhydrous)
(NH4)2Mn(SO4)2 · 6H2O (hexahydrate)
Molar mass: 283.138 g/mol (anhydrous)
391.227 g/mol (hexahydrate)
Density: 1.827 g/cm3 (anhydrous)
Crystal system: monoclinic (hexahydrate)
a=6.256 Å, b=12.742 Å, c=9.398 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: pink
Stability: erodes (hexahydrate)
hygroscopic (anhydrous)
Hardness: relatively strong

Description

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

Precursors

Reaction between manganese(II) and ammonium sulfates

Chemical equation:

(NH4)2SO4 + MnSO4 = (NH4)2Mn(SO4)2↓


For preparation of 100.00g of manganese(II)-ammonium sulfate hexahydrate а 61.62g of manganese(II) sulfate pentahydrate and 33.78g 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.

Due to the high solubility of the product and the heat generated during dissolution, compounds should be added carefully and less amount of water is recommended..

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

For crystal storing use hermetic vessel with small amount of saturated solution at the bottom or place wadding moistened with such solution. You can use such alternatives as vessel with vaseline or vegetable oil, organic non-hygroscopic solvent (kerosene, benzine or paraffin). Also you can use acrylate polymer or another kinds of solidifying plastic.

Solubility

Very highly soluble in water. Insoluble in ethanol and acetone.


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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])


   Manganese compounds
Salts

Manganese(II) acetate (Mn(CH3COO)2) • Manganese(II) chloride (MnCl2) • Manganese(II) formate (Mn(COOH)2) • Manganese(II) sulfate (MnSO4)

Double salts

Cerium(III)-cobalt-manganese nitrate (3(Co,Mn)(NO3)2 · 2Ce(NO3)3) • Cerium(III)-manganese nitrate (3Mn(NO3)2 · 2Ce(NO3)3) • Manganese(II)-ammonium sulfate ((NH4)2Mn(SO4)2) • Manganese(III)-ammonium sulfate (NH4Mn(SO4)2) • Manganese(II)-potassium sulfate (K2Mn(SO4)2)


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