Silver (I) selenide

Crystal structure
	__ Ag __ Se
General
Surname	Silver (I) selenide
Ratio formula	Ag 2 Se
Brief description	black solid
External identifiers / databases
EC number	215-099-8
ECHA InfoCard	100,013,727
PubChem	6914520
Wikidata	Q976343
properties
Molar mass	294.70 g mol −1
Physical state	firmly
density	8.22 g cm −3 (25 ° C)
Melting point	880 ° C
safety instructions
H and P phrases	H: 301-331-373-410
	P: 261-273-301 + 310-311-501
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Silver (I) selenide is an inorganic chemical compound of silver from the group of selenides .

Occurrence

Silver (I) selenide occurs naturally in the form of the mineral naumannite . The compound is also found in the anode sludge produced during copper refining .

Extraction and presentation

Silver (I) selenide can be obtained by reacting silver with selenium at 400 ° C.

{\ displaystyle \ mathrm {2 \ Ag + Se \ longrightarrow Ag_ {2} Se}}

It is also possible to display it by reacting soluble silver salts with copper (I) selenide .

properties

Silver (I) selenide is a black, crystalline solid. At 75 ° C it has a tetragonal (a = 49.8 pm, c = 47.8 pm) and at 240 ° C a cubic crystal structure . Other sources indicate an orthorhombic crystal structure for the former. It is a I-VI semiconductor , but is rarely used because of its poor strength and solubility.

Individual evidence

↑ ^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. 1000.

↑ ^a ^b ^c data sheet Silver (I) selenide from Sigma-Aldrich , accessed on May 25, 2017 ( PDF ).

↑ ^a ^b Perrin Walker, William H. Tarn: CRC Handbook of Metal Etchants . CRC Press, 1990, ISBN 0-8493-3623-6 , pp. 1166 ( limited preview in Google Book search).

↑ Erwin Riedel, Christoph Janiak: Inorganic Chemistry . Walter de Gruyter, 2011, ISBN 3-11-022567-0 , p. 437 ( limited preview in Google Book search).

↑ Collaboration: Authors and editors of the volumes III / 17E-17F-41C: Silver selenide (Ag2Se) crystal structure, lattice parameters . In: O. Madelung, U. Rössler, M. Schulz (eds.): Non-Tetrahedrally Bonded Elements and Binary Compounds I (= Landolt-Börnstein - Group III Condensed Matter ). tape 41 C. Springer, Berlin / Heidelberg 1998, ISBN 3-540-64583-7 , pp. 1-4 , doi : 10.1007 / 10681727_93 .

^ YI Aliyev, AG Babayev, DI Ismayilov, YG Asadov: The structural and thermodynamic aspects of polymorphic transformations in Ag ₂ Se . In: Fizika . vol . XII, No. 3 , 2007, p. 56–61 ( gov.az [PDF; accessed April 17, 2014]).

[brauer-1] 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. 1000.

[Sigma-2] ta sheet Silver (I) selenide from Sigma-Aldrich , accessed on May 25, 2017 ( PDF ).

[Perrin_Walker,_William_H._Tarn-3] Perrin Walker, William H. Tarn: CRC Handbook of Metal Etchants . CRC Press, 1990, ISBN 0-8493-3623-6 , pp. 1166 ( limited preview in Google Book search).

[Erwin_Riedel,_Christoph_Janiak-4] Erwin Riedel, Christoph Janiak: Inorganic Chemistry . Walter de Gruyter, 2011, ISBN 3-11-022567-0 , p. 437 ( limited preview in Google Book search).

[5] Collaboration: Authors and editors of the volumes III / 17E-17F-41C: Silver selenide (Ag2Se) crystal structure, lattice parameters . In: O. Madelung, U. Rössler, M. Schulz (eds.): Non-Tetrahedrally Bonded Elements and Binary Compounds I (= Landolt-Börnstein - Group III Condensed Matter ). tape 41 C. Springer, Berlin / Heidelberg 1998, ISBN 3-540-64583-7 , pp. 1-4 , doi : 10.1007 / 10681727_93 .