Ga2S3 - GALLIUM (III) SULFIDE

Properties of gallium (III) sulfide:

Bright yellow, melts without decomposition under excessive pressure of sulfur vapor; at further heating it is decomposes. Fully hydrolyzed with water, it does not precipitate out of solution. It reacts with acids and alkalis.


Molar mass g/mol 235.64
Density g/cm3 3.747
Melting point °C 1125

Methods for preparation of gallium (III) sulfide:

2Ga + 3S = Ga2S3 (800° C).

2Ga + 3H2S = Ga2S3 + 3H2 (250-350° C).

Ga2O3 + 3H2S = Ga2S3 + 3H2O (600-700° C).


Chemical reactions with gallium (III) sulfide:

Ga2S3 = Ga2S2 + S (950-1300° C).

Ga2S3 + 6H2O = 2Ga(OH)3↓ + 3H2S↑.

Ga2S3 + 6HCl(diluted) = 2GaCl3 + 3H2S↑.

Ga2S3 + 5NaOH(conc., hot) + 3H2O = 2Na[Ga(OH)4] + 3NaHS.

Ga2S3 + Na2S = 2Na[GaS2] (700-800° C).

2Ga2S3 + 9O2 = 2Ga2O3 + 6SO2 (500-750° C).


 

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