Partial pressures of Te2(g) in equilibrium with Ge12−δTe12 + δ(c) from optical density data
Partial pressures of Te2(g) in equilibrium with Ge12−δTe12 + δ(c) from optical density data
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根据光密度数据得出 Te2(g) 与 Ge12−δTe12 + δ(c) 平衡的分压
DOI：
10.1016/0022-3697(66)90144-2
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发表时间：
1966
期刊：
影响因子：
--
通讯作者：
R. F. Brebrick
中科院分区：
文献类型：
--
作者：
R. F. Brebrick
The partial pressures of Te 2 (g) in equilibrium with Ge-Te samples containing 1.00, 49.84, 49.92, 50.00, 50.08, 50.30, 50.60, 50.70, 50.85, 51.01, 51.5 and 52.0 at.% Te have been determined between about 500 and 780° C by measuring the optical density of the vapor at 4357 and 5000 Å. The data show that the maximum melting point of Ge 1 2− δ Te 1 2+ δ (c) occurs at 724±1° C and 49.84 at.% Te. The Te-rich solidus increases in Te-content with decreasing temperature to 500° C where it is 51.32 at.% Te. The stoichiometric solid is in equilibrium with a 52.0 at.% Te liquid and lies within the homogeneity range down to at least 600° C. At 636° C the Gibbs free energy of formation of Ge 1 2− δ Te 1 2+ δ (c) from ideal Te 2 (g) and Ge (g) each at 1 atm, increases monotonically with at.% Te at the rate of about 1.1±0.03 kcal/mole/at.% Te. The partial molal enthalpies and entropies of Te and Ge in Ge 1 2− gd Te 1 2+ δ (c) have also been obtained. It can be concluded that the primarily Te-rich homogeneity range of Ge 1 2− δ Te 1 2+ δ (c) cannot be attributed to the properties of this phase alone, which in fact tend to shift the homogeneity range towards Ge-rich compositions.
