Copper (I) telluride

General
Surname	Copper (I) telluride
other names	Dicopper telluride
Molecular formula	Cu 2 Te
Brief description	bluish black odorless solid
External identifiers / databases
EC number	234-646-1
ECHA InfoCard	100,031,484
PubChem	6914517
Wikidata	Q4454241
properties
Molar mass	254.68 g mol −1
Physical state	firmly
density	7.27 g cm −3
Melting point	1127 ° C
solubility	almost insoluble in water
Refractive index	1.45 (20 ° C)
safety instructions
GHS labeling of hazardous substances danger
H and P phrases	H: 301-332
	P: 261-301 + 310-304 + 340-312-405-501
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C

Copper (I) telluride is an inorganic chemical compound of copper from the group of tellurides . In addition to this feature Rickardit Cu ₇ Te ₅ and Vulcanit / copper (II) telluride CuTe at least two further Kupfertelluride known.

Occurrence

Copper (I) telluride occurs naturally in the form of the mineral whiteite .

Extraction and presentation

Copper (I) telluride can be obtained by reacting copper with tellurium under a protective layer of sodium chloride and potassium chloride .

{\ displaystyle \ mathrm {2 \ Cu + Te \ longrightarrow Cu_ {2} Te}}

properties

Copper (I) telluride is a gray-blue, brittle solid that is insoluble in water. At room temperature it has a hexagonal crystal structure with the space group P 6 / mmm (space group no. 191) and the lattice parameters a = 417 pm, c = 720 pm. When the temperature is increased, the compound shows an unusually large number of transformations for a single-phase system up to a temperature of 600 ° C. Template: room group / 191

use

The almost exclusively in the electrolytic copper refining the anode sludge obtained copper (I) telluride is used for the preparation of tellurium. In addition to copper (I) telluride, it also contains silver telluride and gold (I) telluride . The connection itself is one of the conductive contact material most commonly used for highly efficient cadmium telluride - solar cells .

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h data sheet Copper (I) telluride, 99.5% (metals basis) from AlfaAesar, accessed on April 12, 2014 ( PDF )(JavaScript required) .
^ William M. Haynes: CRC Handbook of Chemistry and Physics, 93rd Edition . CRC Press, 2012, ISBN 1-4398-8049-2 , pp. 4–61 ( limited preview in Google Book search).
↑ ^a ^b Georg Brauer (Ed.), With the collaboration of Marianne Baudler u a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 983.
^ Günter Harbeke: On the line mechanism in the Cu-Te system. 1957, urn : nbn: de: gbv: 084-12121913264 .
^ AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 101st edition. Walter de Gruyter, Berlin 1995, ISBN 3-11-012641-9 , p. 629.
↑ Kai-Ming Ho, Manh Cuong Nguyen, Jinho Choi, Cai-Zhuang Wang, Xin Zhao, Zhenyu Zhang: Crystal structure of Cu ₂ Te predicted within adaptive genetic algorithm . 2013, p. 38011 , bibcode : 2013APS..MARR38011H .

[Alfa-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h data sheet Copper (I) telluride, 99.5% (metals basis) from AlfaAesar, accessed on April 12, 2014 ( PDF )(JavaScript required) .

[William_M._Haynes-2] William M. Haynes: CRC Handbook of Chemistry and Physics, 93rd Edition . CRC Press, 2012, ISBN 1-4398-8049-2 , pp. 4–61 ( limited preview in Google Book search).

[brauer-3] Georg Brauer (Ed.), With the collaboration of Marianne Baudler u a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 983.

[4] Günter Harbeke: On the line mechanism in the Cu-Te system. 1957, urn : nbn: de: gbv: 084-12121913264 .

[Arnold_F._Holleman-5] AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 101st edition. Walter de Gruyter, Berlin 1995, ISBN 3-11-012641-9 , p. 629.

[harvard.edu-6] Kai-Ming Ho, Manh Cuong Nguyen, Jinho Choi, Cai-Zhuang Wang, Xin Zhao, Zhenyu Zhang: Crystal structure of Cu ₂ Te predicted within adaptive genetic algorithm . 2013, p. 38011 , bibcode : 2013APS..MARR38011H .