Discidium trisulfide

Discidium trisulfide
Discidium trisulfide
Are common
Systematic ; name	Discidium trisulfide
Traditional names	Scabium sesquisulfide
Chem. formula	Sc 2 S 3
Physical properties
condition	yellow crystals
Molar mass	186.11 g / mol
Density	2.80; 2.91 g / cm³
Thermal properties
T. melt.	1700 ° C
Classification
Reg. CAS number	12166-29-9
Pubchem
Reg. EINECS number
SMILES
Inchi
Chemspider
Security
NFPA 704	0 one 0

Discandium trisulfide is a binary inorganic compound of the metal of scandium and sulfur with the formula Sc ₂ S ₃ , yellow crystals, insoluble in water.

Content

Getting

Effect of sulfur vapor on metallic scandium:

{\mathsf {2Sc+3S\ {\xrightarrow {600-800^{o}C}}\ Sc_{2}S_{3}}}

{\ displaystyle {\ mathsf {2Sc + 3S \ {\ xrightarrow {600-800 ^ {o} C}} \ Sc_ {2} S_ {3}}}

Effect of hydrogen sulfide or carbon disulfide on scandium oxide :

{\mathsf {Sc_{2}O_{3}+3H_{2}S\ {\xrightarrow {1000-1150^{o}C}}\ Sc_{2}S_{3}+3H_{2}O}}

{\ displaystyle {\ mathsf {Sc_ {2} O_ {3} + 3H_ {2} S \ {\ xrightarrow {1000-1150 ^ {o} C}} \ Sc_ {2} S_ {3} + 3H_ {2} O}}}

{\mathsf {2Sc_{2}O_{3}+3CS_{2}\ {\xrightarrow {T}}\ 2Sc_{2}S_{3}+3CO_{2}}}

{\ displaystyle {\ mathsf {2Sc_ {2} O_ {3} + 3CS_ {2} \ {\ xrightarrow {T}} \ 2Sc_ {2} S_ {3} + 3CO_ {2}}}

Reduction of scandium sulphate with carbon or hydrogen sulfide :

{\mathsf {Sc_{2}(SO_{4})_{3}+12C\ {\xrightarrow {T}}\ Sc_{2}S_{3}+12CO}}

{\ displaystyle {\ mathsf {Sc_ {2} (SO_ {4}) _ {3} + 12C \ {\ xrightarrow {T}} \ Sc_ {2} S_ {3} + 12CO}}}

{\mathsf {Sc_{2}(SO_{4})_{3}+3H_{2}S\ {\xrightarrow {T}}\ Sc_{2}S_{3}+3H_{2}SO_{4}}}

{\ displaystyle {\ mathsf {Sc_ {2} (SO_ {4}) _ {3} + 3H_ {2} S \ {\ xrightarrow {T}} \ Sc_ {2} S_ {3} + 3H_ {2} SO_ {four}}}}

Physical Properties

Discidium trisulfide forms yellow crystals.

Does not dissolve in cold water, reacts with hot.

Chemical Properties

Reacts with hot water:

{\mathsf {Sc_{2}S_{3}+6H_{2}O\ {\xrightarrow {100^{o}C}}\ 2Sc(OH)_{3}+3H_{2}S\uparrow }}

{\ displaystyle {\ mathsf {Sc_ {2} S_ {3} + 6H_ {2} O \ {\ xrightarrow {100 ^ {o} C}} \ 2Sc (OH) _ {3} + 3H_ {2} S \ uparrow}}}

Reacts with acids :

{\mathsf {Sc_{2}S_{3}+3HCl\ {\xrightarrow {}}\ 2ScCl_{3}+3H_{2}S\uparrow }}

{\ displaystyle {\ mathsf {Sc_ {2} S_ {3} + 3HCl \ {\ xrightarrow {}} \ 2ScCl_ {3} + 3H_ {2} S \ uparrow}}}

It is oxidized by air oxygen when heated:

{\mathsf {3Sc_{2}S_{3}+15O_{2}\ {\xrightarrow {350-425^{o}C}}\ 2Sc_{2}O_{3}+Sc_{2}(SO_{4})_{3}+6SO_{2}\uparrow }}

{\ displaystyle {\ mathsf {3Sc_ {2} S_ {3} + 15O_ {2} \ {\ xrightarrow {350-425 ^ {o} C}} \ 2Sc_ {2} O_ {3} + Sc_ {2} ( SO_ {4}) _ {3} + 6SO_ {2} \ uparrow}}}

Literature

Lidin R.A. and other Chemical properties of inorganic substances: Proc. manual for universities. - 3rd ed., Corr. - M .: Chemistry, 2000. - 480 p. - ISBN 5-7245-1163-0 .
Ripan R., Chetyanu I. Inorganic chemistry. Metal Chemistry. - M .: Mir, 1972. - T. 2. - 871 p.