Iron (III) sulfide

Iron sulfide
Iron sulfide
Are common
Systematic ; name	Iron (III) sulfide
Traditional names	Sulfur Iron
Chem. formula	Fe 2 S 3
Physical properties
condition	yellow green crystals
Molar mass	207.89 g / mol
Density	4.3 g / cm³
Chemical properties
Water solubility	slightly soluble
Classification
Reg. CAS number	12063-27-3
Pubchem
SMILES
Inchi
CHEBI
Chemspider

Iron (III) sulfide is an inorganic compound, a salt of iron and hydrosulphuric acid with the formula Fe ₂ S ₃ , yellow-green crystals, not soluble in water.

Content

Getting

The exchange reaction between ammonium sulfide and ferric salts:

{\mathsf {2Fe(NO_{3})_{3}+3(NH_{4})_{2}S\ {\xrightarrow {}}\ Fe_{2}S_{3}\downarrow +6NH_{4}NO_{3}}}

{\ displaystyle {\ mathsf {2Fe (NO_ {3}) _ {3} +3 (NH_ {4}) _ {2} S \ {\ xrightarrow {}} \ Fe_ {2} S_ {3} \ downarrow + 6NH_ {4} NO_ {3}}}}

The effect of hydrogen sulfide on the suspension of iron hydroxide (III) in the absence of air:

{\mathsf {2Fe(OH)_{3}+3H_{2}S\ {\xrightarrow {}}\ Fe_{2}S_{3}\downarrow +6H_{2}O}}

{\ displaystyle {\ mathsf {2Fe (OH) _ {3} + 3H_ {2} S \ {\ xrightarrow {}} \ Fe_ {2} S_ {3} \ downarrow + 6H_ {2} O}}}

Passing hot hydrogen sulfide through iron (III) oxide :

{\mathsf {Fe_{2}O_{3}+H_{2}S\ {\xrightarrow {<100^{o}C}}\ Fe_{2}S_{3}+H_{2}O}}

{\ displaystyle {\ mathsf {Fe_ {2} O_ {3} + H_ {2} S \ {\ xrightarrow {<100 ^ {o} C}} \ Fe_ {2} S_ {3} + H_ {2} O }}}

Physical Properties

Iron (III) sulfide forms yellow-green crystals of the cubic system , the space group F d3m , cell parameters a = 0.99342 nm, Z = 12.

It is very slightly soluble in water.

The crystals are formed upon prolonged exposure of the amorphous suspension under a pressure of hydrogen sulfide of 10 at.

Chemical Properties

It decomposes when heated in an inert atmosphere:

{\mathsf {Fe_{2}S_{3}\ {\xrightarrow {200^{o}C}}\ FeS+FeS_{2}}}

{\ displaystyle {\ mathsf {Fe_ {2} S_ {3} \ {\ xrightarrow {200 ^ {o} C}} \ FeS + FeS_ {2}}}

When stored in air, it decomposes in several ways:

{\mathsf {2Fe_{2}S_{3}\ {\xrightarrow {}}\ Fe_{3}S_{4}+FeS_{2}}}

{\ displaystyle {\ mathsf {2Fe_ {2} S_ {3} \ {\ xrightarrow {}} \ Fe_ {3} S_ {4} + FeS_ {2}}}}

{\mathsf {2Fe_{2}S_{3}+3O_{2}\ {\xrightarrow {}}\ 2Fe_{2}O_{3}+6S}}

{\ displaystyle {\ mathsf {2Fe_ {2} S_ {3} + 3O_ {2} \ {\ xrightarrow {}} \ 2Fe_ {2} O_ {3} + 6S}}}

the presence of moisture accelerates decomposition.

Literature

Chemical Encyclopedia / Redkol .: Knunyants I.L. et al. - M .: Soviet Encyclopedia, 1990. - T. 2. - 671 p. - ISBN 5-82270-035-5 .
Chemist Handbook / Redkol .: Nikolsky B.P. et al. - 3rd ed., Rev. - L .: Chemistry, 1971. - T. 2. - 1168 p.
Samsonov G.V., Drozdova S.V. Sulphides. - M .: Metallurgy, 1972. - 304 p.