Gallium (III) selenide

Crystal structure
	__ Ga __ Se
General
Surname	Gallium (III) selenide
other names	Gallium sesquiselenide
Ratio formula	Ga 2 Se 3
Brief description	black solid
External identifiers / databases
EC number	234-693-8
ECHA InfoCard	100,031,527
PubChem	165985
Wikidata	Q4119851
properties
Molar mass	376.33 g mol −1
Physical state	firmly
density	5.203 g cm −3
Melting point	1020 ° C
safety instructions
H and P phrases	H: 300-330-373-410
	P: 260-301 + 310-304 + 340-320-330-405-501
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Gallium (III) selenide is an inorganic chemical compound of gallium from the group of selenides .

Extraction and presentation

Gallium (III) selenide can be obtained by reacting gallium with selenium at high temperatures.

{\ displaystyle \ mathrm {2 \ Ga + 3 \ Se \ longrightarrow Ga_ {2} Se_ {3}}}

properties

Gallium (III) selenide is a compact mass of black, finely ground red solid that is quite hard and brittle. It has a cubic crystal structure of the zinc blende type with the space group F 4 3 m (space group no. 216) . The compound crystallizes in two modifications. The α-form with a zinc blende grid that is stable at low temperatures and a high-temperature modification (β) with a wurtzite structure . The transition temperature is between 550 ° C and 600 ° C. Template: room group / 216

Individual evidence

↑ ^a ^b ^c ^d data sheet Gallium (III) selenide, 99.99% (metals basis) from AlfaAesar, accessed on March 4, 2014 ( PDF )(JavaScript required) .
↑ ^a ^b ^c ^d Georg Brauer (Ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 860.
↑ Roger Blachnik (Ed.): Paperback for chemists and physicists . Volume III: Elements, Inorganic Compounds and Materials, Minerals . founded by Jean d'Ans, Ellen Lax. 4th, revised and revised edition. Springer, Berlin 1998, ISBN 3-540-60035-3 , pp. 466 ( limited preview in Google Book search).
↑ Harry Hahn, Wilhelm Klingler: About the crystal structures of Ga2S3, Ga2Se3 and Ga2Te3. In: Journal of Inorganic Chemistry. 259, 1949, pp. 135-142, doi : 10.1002 / zaac.19492590111 .

[Alfa-1] ta sheet Gallium (III) selenide, 99.99% (metals basis) from AlfaAesar, accessed on March 4, 2014 ( PDF )(JavaScript required) .

[brauer-2] Georg Brauer (Ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 860.

[Jean_d'._Ans,_Ellen_Lax,_Roger_Blachnik-3] Roger Blachnik (Ed.): Paperback for chemists and physicists . Volume III: Elements, Inorganic Compounds and Materials, Minerals . founded by Jean d'Ans, Ellen Lax. 4th, revised and revised edition. Springer, Berlin 1998, ISBN 3-540-60035-3 , pp. 466 ( limited preview in Google Book search).

[DOI10.1002/zaac.19492590111-4] Harry Hahn, Wilhelm Klingler: About the crystal structures of Ga2S3, Ga2Se3 and Ga2Te3. In: Journal of Inorganic Chemistry. 259, 1949, pp. 135-142, doi : 10.1002 / zaac.19492590111 .