Thermodynamic Analysis of the Equilibrium Vapor Phase Composition of the Cd-I2 System
| Authors | O.V. Rybak |
| Affiliations |
Lviv Polytechnic National University, 79013 Lviv, Ukraine |
| Е-mail | oksana.v.rybak@lpnu.ua |
| Issue | Volume 16, Year 2024, Number 1 |
| Dates | Received 10 January 2024; revised manuscript received 18 February 2024; published online 28 February 2024 |
| Citation | O.V. Rybak, J. Nano- Electron. Phys. 16 No 1, 01021 (2024) |
| DOI | https://doi.org/10.21272/jnep.16(1).01021 |
| PACS Number(s) | 05.70. – a, 81.10Bk 82.60.Hc |
| Keywords | Cadmium diiodide, Thermodynamic analysis, Equilibrium constant, Partial pressure, Vapor phase. |
| Annotation |
The thermodynamic analysis of the composition of the vapor phase of the Cd-I2 system in the temperature range of 298-2000 K at the values of the total pressure in the system from 0.1 kPa to 100 kPa was assessed. The calculations assumed that the Cd-I2 system in the vapor phase contains the following components: I, I2, Cd, CdI, and CdI2. The results show that the dominant component of the vapor phase is cadmium diiodide (CdI2). In the temperature range of 298-950 K, Cd, and I2 predominate among the dissociation products, and the equilibrium in the vapor phase is described by the reaction CdI2(g) ↔ Cd(g) + I2(g). The optimal temperature conditions for growing cadmium diiodide crystals from the vapor phase are proposed. Single crystals of CdI2 have been grown at the temperature of the source zone – 890-900 K, and crystallization zone – 500-530 K. |
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