Disodium silver telluride is a binary inorganic compound of silver and tellurium with the formula Ag 2 Te, gray or black crystals, it does not dissolve in water.
| Dis telluride | |
|---|---|
| General | |
| Systematic name | Dis telluride |
| Traditional names | Tellurium silver |
| Chem. formula | Ag 2 Te |
| Physical properties | |
| condition | gray crystals |
| Molar mass | 343.34 g / mol |
| Density | 8.4; 8.5 g / cm³ |
| Thermal properties | |
| T. melt. | 955; 960 ° C |
| Enthalpy of Education | -18.1 [1] kJ / mol |
| Classification | |
| Reg. CAS number | 12002-99-2 |
| PubChem | |
| Reg. EINECS number | |
| Smiles | |
| Inchi | |
| ChemSpider | |
Content
- 1 Receiving
- 2 Physical properties
- 3 notes
- 4 Literature
Getting
- In nature, the Hessite mineral Ag 2 Te with impurities Au , Pb is found [2] .
- Heating stoichiometric amounts of pure substances:
Physical Properties
Disodium silver telluride forms gray or black crystals of several modifications:
- α-Ag 2 Te, monoclinic syngony , space group P 2 1 / c , cell parameters a = 0.652 nm , b = 0.615 nm , c = 0.611 nm , β = 61.25 ° , exists at temperatures below 145 ° C;
- β-Ag 2 Te, cubic syngony , space group F m 3 m , cell parameters a = 0.6595 nm , Z = 4 , exists at a temperature of 145-802 ° С;
- γ-Ag 2 Te, cubic syngony , space group F m 3 m , cell parameters a = 0.529 nm , Z = 2 , exists at temperatures above 802 ° C [3] [4] .
Not soluble in water.
The compound melts congruently at a temperature of 960 ° C.
Notes
- ↑ P. Franke, D. Neuschütz. Ag-Te (Silver - Tellurium). Thermodynamic Properties of Inorganic Materials // Landolt-Börnstein - Group IV Physical Chemistry. - 2007.- T. 19B5 . - S. 1-4 . - DOI : 10.1007 / 978-3-540-45280-5_16 .
- ↑ Hessit. Material from GeoWiki, an open encyclopedia on Earth sciences.
- ↑ State Diagrams of Double Metal Systems / Ed. N.P. Lyakisheva. - M .: Mechanical Engineering, 1996. - T. 1. - 992 p. - ISBN 5-217-02688-X .
- ↑ B. Predel. Ag-Te (Silver-Tellurium) // Landolt-Börnstein - Group IV Physical Chemistry. - 1991 .-- T. 5a . - S. 1-6 . - DOI : 10.1007 / 10000866_74 .
Literature
- Chemistry Handbook / Editorial: Nikolsky B.P. et al. - 2nd ed., rev. - M.-L.: Chemistry, 1966. - T. 1. - 1072 p.
- Chemistry Handbook / Editorial: Nikolsky B.P. et al. - 3rd ed., rev. - L .: Chemistry, 1971. - T. 2. - 1168 p.
- CRC Handbook of Chemistry and Physics . - 89th Edition. - Taylor and Francis Group, LLC, 2008-2009.