Ge–Y system
60 accepted literature values from 1 paper(s) (experimental 26, model 34); 1 calculated phase diagram(s). 2 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV.
Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (14) · papers (bibliography) · Markdown
| Evidence class | Values |
|---|---|
| experimental | 26 |
| model | 34 |
| Property group | Values |
|---|---|
| invariant reaction | 28 |
| phase transition | 9 |
| formation | 23 |
Calculated phase diagrams
Binary phase diagrams calculated with pycalphad 0.11.2 from the SGTE binary collection (Hallstedt 2025, CC BY 4.0). Evidence class: model.
| TDB file | Assessment | SHA-256 | Links |
|---|---|---|---|
| GeY-13Idb.tdb | M. Idbenali, C. Servant, J. Therm. Anal. Calorim., 111, 911-16(2013). doi:10.1007/s10973-012-2271-0 | 06a372a4f32faf120821f330a7702cab696f4e92fb451f414368f8042f13493a | viewer · TDB · JSON |
| TDB file | T (K) | Phases at the invariant |
|---|---|---|
| GeY-13Idb.tdb | 2215.33 | GE4Y5 (x(Y) 0.55556) + LIQUID (x(Y) 0.57356) + GE3Y5_D88 (x(Y) 0.625) |
| GeY-13Idb.tdb | 2215.33 | GE4Y5 (x(Y) 0.55556) + LIQUID (x(Y) 0.57339) + GE3Y5_D88 (x(Y) 0.625) |
| GeY-13Idb.tdb | 2215.33 | GE4Y5 (x(Y) 0.55556) + LIQUID (x(Y) 0.57394) + GE3Y5_D88 (x(Y) 0.625) |
| GeY-13Idb.tdb | 2157.47 | LIQUID (x(Y) 0.47799) + GE10Y11 (x(Y) 0.52381) + GE4Y5 (x(Y) 0.55556) |
| GeY-13Idb.tdb | 2157.46 | LIQUID (x(Y) 0.47776) + GE10Y11 (x(Y) 0.52381) + GE4Y5 (x(Y) 0.55556) |
| GeY-13Idb.tdb | 2008.97 | LIQUID (x(Y) 0.39879) + GEY_B33 (x(Y) 0.5) + GE10Y11 (x(Y) 0.52381) |
| GeY-13Idb.tdb | 2008.97 | LIQUID (x(Y) 0.39871) + GEY_B33 (x(Y) 0.5) + GE10Y11 (x(Y) 0.52381) |
| GeY-13Idb.tdb | 2008.97 | LIQUID (x(Y) 0.39892) + GEY_B33 (x(Y) 0.5) + GE10Y11 (x(Y) 0.52381) |
| GeY-13Idb.tdb | 1735.74 | LIQUID (x(Y) 0.97305) + BCC_A2 (x(Y) 0.99709) + HCP_A3 (x(Y) 1) |
| GeY-13Idb.tdb | 1732.57 | LIQUID (x(Y) 0.31451) + GE3Y2_HT (x(Y) 0.4) + GEY_B33 (x(Y) 0.5) |
| GeY-13Idb.tdb | 1732.57 | LIQUID (x(Y) 0.31445) + GE3Y2_HT (x(Y) 0.4) + GEY_B33 (x(Y) 0.5) |
| GeY-13Idb.tdb | 1732.57 | LIQUID (x(Y) 0.31467) + GE3Y2_HT (x(Y) 0.4) + GEY_B33 (x(Y) 0.5) |
| GeY-13Idb.tdb | 1707.4 | GE3Y2_HT (x(Y) 0.4) + GE3Y2_C32 (x(Y) 0.4) + GEY_B33 (x(Y) 0.5) |
| GeY-13Idb.tdb | 1707.4 | LIQUID (x(Y) 0.30352) + GE3Y2_C32 (x(Y) 0.4) + GE3Y2_HT (x(Y) 0.4) |
| GeY-13Idb.tdb | 1707.4 | LIQUID (x(Y) 0.30331) + GE3Y2_HT (x(Y) 0.4) + GE3Y2_C32 (x(Y) 0.4) |
| GeY-13Idb.tdb | 1549.61 | GE3Y5_D88 (x(Y) 0.625) + LIQUID (x(Y) 0.90517) + HCP_A3 (x(Y) 1) |
| GeY-13Idb.tdb | 1177.32 | LIQUID (x(Y) 0.16179) + GE5Y3_CC (x(Y) 0.375) + GE3Y2_C32 (x(Y) 0.4) |
| GeY-13Idb.tdb | 1177.32 | LIQUID (x(Y) 0.16176) + GE5Y3_CC (x(Y) 0.375) + GE3Y2_C32 (x(Y) 0.4) |
| GeY-13Idb.tdb | 1132.58 | LIQUID (x(Y) 0.15153) + GE2Y (x(Y) 0.33333) + GE5Y3_CC (x(Y) 0.375) |
| GeY-13Idb.tdb | 1130.45 | LIQUID (x(Y) 0.15093) + GE7Y2 (x(Y) 0.22222) + GE2Y (x(Y) 0.33333) |
| GeY-13Idb.tdb | 1112.3 | DIAMOND_A4 (x(Y) 0) + LIQUID (x(Y) 0.13854) + GE7Y2 (x(Y) 0.22222) |
| GeY-13Idb.tdb | 1112.3 | DIAMOND_A4 (x(Y) 0) + LIQUID (x(Y) 0.13839) + GE7Y2 (x(Y) 0.22222) |
| GeY-13Idb.tdb | 1112.3 | DIAMOND_A4 (x(Y) 0) + LIQUID (x(Y) 0.13853) + GE7Y2 (x(Y) 0.22222) |
| GeY-13Idb.tdb | 1031.26 | DIAMOND_A4 (x(Y) 0) + GE7Y2 (x(Y) 0.22222) + GE2Y (x(Y) 0.33333) |
| GeY-13Idb.tdb | 1028.66 | DIAMOND_A4 (x(Y) 0) + GE2Y (x(Y) 0.33333) + GE5Y3_CC (x(Y) 0.375) |
| GeY-13Idb.tdb | 510.28 | GEY_B33 (x(Y) 0.5) + GE10Y11 (x(Y) 0.52381) + GE4Y5 (x(Y) 0.55556) |
Convex hulls: Materials Project DFT hull · OQMD DFT hull
Invariant reactions (literature)
| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---|---|---|---|---|---|---|
| 2218 | Ge4Y5 -> Liq + Ge3Y5 | Ge4Y5: Y 0.555556; L: Y 0.552; Ge3Y5: Y 0.625 | experimental | [1] Idbenali 2013 cites Schmidt 1972 doi | Table 3, p. 4, row 19 report | |
| 2214 | Ge4Y5 -> Liq + Ge3Y5 | Ge4Y5: Y 0.555556; L: Y 0.572; Ge3Y5: Y 0.625 | model | [1] Idbenali 2013 | Table 3, p. 4, row 20 report | |
| 2173 | Ge10Y11 -> Liq + Ge4Y5 | Ge10Y11: Y 0.52381; L: Y 0.498; Ge4Y5: Y 0.555556 | experimental | [1] Idbenali 2013 cites Schmidt 1972 doi | Table 3, p. 4, row 17 report | |
| 2157 | Ge10Y11 -> Liq + Ge4Y5 | Ge10Y11: Y 0.52381; L: Y 0.477; Ge4Y5: Y 0.555556 | model | [1] Idbenali 2013 | Table 3, p. 4, row 18 report | |
| 2003 | GeY -> Liq + Ge10Y11 | GeY: Y 0.5; L: Y 0.396; Ge10Y11: Y 0.52381 | model | [1] Idbenali 2013 | Table 3, p. 4, row 16 report | |
| 2003 | GeY -> Liq + Ge10Y11 | GeY: Y 0.5; L: Y 0.44; Ge10Y11: Y 0.52381 | experimental | [1] Idbenali 2013 cites Schmidt 1972 doi | Table 3, p. 4, row 15 report | |
| 1736 | HCP -> BCC + Liq | L: Y 0.973 | model | [1] Idbenali 2013 | Table 3, p. 4, row 26 report | |
| 1733 | Ge1.5Y-HT -> GeY + Liq | Ge1.5Y-HT: Y 0.4; GeY: Y 0.5; L: Y 0.314 | model | [1] Idbenali 2013 | Table 3, p. 4, row 14 report | |
| 1733 | HCP -> BCC + Liq | L: Y 0.97 | experimental | [1] Idbenali 2013 cites Schmidt 1972 doi | Table 3, p. 4, row 25 report | |
| 1732 | Ge1.5Y-HT -> GeY + Liq | Ge1.5Y-HT: Y 0.4; GeY: Y 0.5; L: Y 0.384 | experimental | [1] Idbenali 2013 cites Schmidt 1972 doi | Table 3, p. 4, row 13 report | |
| 1707 | Ge1.5Y-HT + Liq -> Ge1.5Y-LT | Ge1.5Y-HT: Y 0.4; L: Y 0.491; Ge1.5Y-LT: Y 0.4 | model | [1] Idbenali 2013 | Table 3, p. 4, row 28 report | |
| 1707 | Ge1.5Y-HT + GeY -> Ge1.5Y-LT | Ge1.5Y-HT: Y 0.303; GeY: Y 0.5; Ge1.5Y-LT: Y 0.4 | model | [1] Idbenali 2013 | Table 3, p. 4, row 30 report | |
| 1703 | Ge1.5Y-HT + Liq -> Ge1.5Y-LT | Ge1.5Y-HT: Y 0.4; L: Y 0.366; Ge1.5Y-LT: Y 0.4 | experimental | [1] Idbenali 2013 cites Schmidt 1972 doi | Table 3, p. 4, row 27 report | |
| 1703 | Ge1.5Y-HT + GeY -> Ge1.5Y-LT | Ge1.5Y-HT: Y 0.384; GeY: Y 0.5; Ge1.5Y-LT: Y 0.4 | experimental | [1] Idbenali 2013 cites Schmidt 1972 doi | Table 3, p. 4, row 29 report | |
| 1553 | eutectic: Liq -> HCP + Ge3Y5 | L: Y 0.88; Ge3Y5: Y 0.625 | experimental | [1] Idbenali 2013 cites Schmidt 1972 doi | Table 3, p. 4, row 23 report | |
| 1550 | eutectic: Liq -> HCP + Ge3Y5 | L: Y 0.905; Ge3Y5: Y 0.625 | model | [1] Idbenali 2013 | Table 3, p. 4, row 24 report | |
| 1181 | Ge5Y3 -> Liq + Ge1.5Y-LT | Ge5Y3: Y 0.375; L: Y 0.164; Ge1.5Y-LT: Y 0.4 | experimental | [1] Idbenali 2013 cites Schmidt 1972 doi | Table 3, p. 4, row 11 report | |
| 1177 | Ge5Y3 -> Liq + Ge1.5Y-LT | Ge5Y3: Y 0.375; L: Y 0.161; Ge1.5Y-LT: Y 0.4 | model | [1] Idbenali 2013 | Table 3, p. 4, row 12 report | |
| 1163 | Ge2Y -> Liq + Ge5Y3 | Ge2Y: Y 0.333333; L: Y 0.152; Ge5Y3: Y 0.375 | experimental | [1] Idbenali 2013 cites Schmidt 1972 doi | Table 3, p. 4, row 9 report | |
| 1150 | Ge2Y -> Liq + Ge5Y3 | Ge2Y: Y 0.333333; L: Y 0.155; Ge5Y3: Y 0.375 | model | [1] Idbenali 2013 | Table 3, p. 4, row 10 report | |
| 1133 | Ge7Y2 -> Ge2Y + Liq | Ge7Y2: Y 0.222222; Ge2Y: Y 0.333333; L: Y 0.142 | experimental | [1] Idbenali 2013 cites Schmidt 1972 doi | Table 3, p. 4, row 7 report | |
| 1132 | Ge7Y2 -> Ge2Y + Liq | Ge7Y2: Y 0.222222; Ge2Y: Y 0.333333; L: Y 0.15 | model | [1] Idbenali 2013 | Table 3, p. 4, row 8 report | |
| 1113 | (Ge) + Ge7Y2 -> Liq | (Ge): Y 0; Ge7Y2: Y 0.222222; L: Y 0.137 | model | [1] Idbenali 2013 | Table 3, p. 4, row 2 report | |
| 1093 | (Ge) + Ge7Y2 -> Liq | (Ge): Y 0; Ge7Y2: Y 0.222222; L: Y 0.119 | experimental | [1] Idbenali 2013 cites Schmidt 1972 doi | Table 3, p. 4, row 1 report | |
| 1033 | Ge7Y2 -> Ge2Y + (Ge) | Ge7Y2: Y 0.222222; Ge2Y: Y 0.333333; (Ge): Y 0 | experimental | [1] Idbenali 2013 cites Schmidt 1972 doi | Table 3, p. 4, row 5 report | |
| 1031 | Ge7Y2 -> Ge2Y + (Ge) | Ge7Y2: Y 0.222222; Ge2Y: Y 0.333333; (Ge): Y 0 | model | [1] Idbenali 2013 | Table 3, p. 4, row 6 report | |
| 985 | (Ge) + Ge5Y3 -> Ge2Y | (Ge): Y 0; Ge5Y3: Y 0.375; Ge2Y: Y 0.333333 | experimental | [1] Idbenali 2013 cites Schmidt 1972 doi | Table 3, p. 4, row 3 report | |
| 982 | (Ge) + Ge5Y3 -> Ge2Y | (Ge): Y 0; Ge5Y3: Y 0.375; Ge2Y: Y 0.333333 | model | [1] Idbenali 2013 | Table 3, p. 4, row 4 report |
Formation enthalpies
Literature values in kJ/mol-atom where the per-atom basis is known. DFT columns: the lowest-energy entry at the same composition (Materials Project 2026.04.13, OQMD v1.8; different energy references, never averaged), from dft_parity.json.
| Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote |
|---|---|---|---|---|---|---|---|---|---|
| Ge1.5Y-HT | Ge3Y2 | -84.1 kJ/mol-atom ± 3.7 | 870 | experimental | -48.013 (mp-aaacreze) | [1] Idbenali 2013 cites Polotskaya 1996 doi | Table 4, p. 5, row 7 report | ||
| Ge1.5Y-HT | Ge3Y2 | -83.025 kJ/mol-atom | 2985 | model | -48.013 (mp-aaacreze) | [1] Idbenali 2013 | Table 4, p. 5, row 9 report | ||
| Ge1.5Y-HT | Ge3Y2 | -67.903 kJ/mol-atom | 870 | model | -48.013 (mp-aaacreze) | [1] Idbenali 2013 | Table 4, p. 5, row 8 report | ||
| Ge1.5Y-LT | Ge3Y2 | -84.785 kJ/mol-atom | 298.15 | model | -48.013 (mp-aaacreze) | [1] Idbenali 2013 | Table 4, p. 5, row 6 report | ||
| Ge1.5Y-LT | Ge3Y2 | -77.8 kJ/mol-atom ± 3.4 | 870 | experimental | -48.013 (mp-aaacreze) | [1] Idbenali 2013 cites Polotskaya 1996 doi | Table 4, p. 5, row 4 report | ||
| Ge1.5Y-LT | Ge3Y2 | -69.664 kJ/mol-atom | 870 | model | -48.013 (mp-aaacreze) | [1] Idbenali 2013 | Table 4, p. 5, row 5 report | ||
| Ge10Y11 | Ge10Y11 | -104.82 kJ/mol-atom | 298.15 | model | -84.382 (mp-aaacqssw) | [1] Idbenali 2013 | Table 4, p. 5, row 16 report | ||
| Ge10Y11 | Ge10Y11 | -100.5 kJ/mol-atom ± 5.2 | 870 | experimental | -84.382 (mp-aaacqssw) | [1] Idbenali 2013 cites Polotskaya 1996 doi | Table 4, p. 5, row 14 report | ||
| Ge10Y11 | Ge10Y11 | -89.461 kJ/mol-atom | 870 | model | -84.382 (mp-aaacqssw) | [1] Idbenali 2013 | Table 4, p. 5, row 15 report | ||
| Ge2Y | Ge2Y | -69.577 kJ/mol-atom | 298.15 | model | -51.377 (mp-aaaaapcv) | -59.996 (oqmd-1795069) | [1] Idbenali 2013 | Table 4, p. 5, row 2 report | |
| Ge3Y5 | Ge3Y5 | -109.7 kJ/mol-atom ± 5.7 | 298.15 | experimental | -80.391 (mp-aaaabagt) | -80.471 (oqmd-10313) | [1] Idbenali 2013 cites Jung 1991 doi | Table 4, p. 5, row 20 report | |
| Ge3Y5 | Ge3Y5 | -107.41 kJ/mol-atom | 298.15 | model | -80.391 (mp-aaaabagt) | -80.471 (oqmd-10313) | [1] Idbenali 2013 | Table 4, p. 5, row 23 report | |
| Ge3Y5 | Ge3Y5 | -91.861 kJ/mol-atom | 870 | model | -80.391 (mp-aaaabagt) | -80.471 (oqmd-10313) | [1] Idbenali 2013 | Table 4, p. 5, row 22 report | |
| Ge3Y5 | Ge3Y5 | -89.8 kJ/mol-atom ± 5 | 298.15 | experimental | -80.391 (mp-aaaabagt) | -80.471 (oqmd-10313) | [1] Idbenali 2013 cites Safonov 1985 | Table 4, p. 5, row 21 report | |
| Ge4Y5 | Ge4Y5 | -109.55 kJ/mol-atom | 298.15 | model | -84.954 (mp-aaaaattw) | -85.431 (oqmd-124138) | [1] Idbenali 2013 | Table 4, p. 5, row 19 report | |
| Ge4Y5 | Ge4Y5 | -102.5 kJ/mol-atom ± 5.5 | 870 | experimental | -84.954 (mp-aaaaattw) | -85.431 (oqmd-124138) | [1] Idbenali 2013 cites Polotskaya 1996 doi | Table 4, p. 5, row 17 report | |
| Ge4Y5 | Ge4Y5 | -94.131 kJ/mol-atom | 870 | model | -84.954 (mp-aaaaattw) | -85.431 (oqmd-124138) | [1] Idbenali 2013 | Table 4, p. 5, row 18 report | |
| Ge5Y3 | Ge5Y3 | -79.834 kJ/mol-atom | 298.15 | model | -69.583 (mp-aaaaazik) | -69.416 (oqmd-1795285) | [1] Idbenali 2013 | Table 4, p. 5, row 3 report | |
| Ge7Y2 | -42.349 kJ/mol-atom | 298.15 | model | [1] Idbenali 2013 | Table 4, p. 5, row 1 report | ||||
| GeY | GeY | -108.8 kJ/mol-atom | model | -86.308 (mp-aaaaaotn) | -86.397 (oqmd-7938) | [1] Idbenali 2013 cites Miedema 1976 doi | Table 4, p. 5, row 24 report | ||
| GeY | GeY | -101.53 kJ/mol-atom | 298.15 | model | -86.308 (mp-aaaaaotn) | -86.397 (oqmd-7938) | [1] Idbenali 2013 | Table 4, p. 5, row 13 report | |
| GeY | GeY | -98 kJ/mol-atom ± 4.9 | 870 | experimental | -86.308 (mp-aaaaaotn) | -86.397 (oqmd-7938) | [1] Idbenali 2013 cites Polotskaya 1996 doi | Table 4, p. 5, row 10 report | |
| GeY | GeY | -86.218 kJ/mol-atom | 870 | model | -86.308 (mp-aaaaaotn) | -86.397 (oqmd-7938) | [1] Idbenali 2013 | Table 4, p. 5, row 12 report |
Other properties
Phase transition (9)
| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---|---|---|---|---|---|---|
| Phase transition | 1093 K | 1093 | (Ge) ? Ge7Y2 , Liq | experimental | [1] Idbenali 2013 cites Schmidt 1972 doi | p. 4 report | The temperature of invariant reactions fits well the experiments [1] except both the temperature of the invariant reaction: (Ge) ? Ge7Y2 , Liq (calculated 1113 K, measured 1093 K) and Ge10Y11 , Liq ? Ge4Y5 (calculated 2157 K, measured 2173 K). |
| Phase transition | 1113 K | 1113 | (Ge) ? Ge7Y2 , Liq | model | [1] Idbenali 2013 | p. 4 report | The temperature of invariant reactions fits well the experiments [1] except both the temperature of the invariant reaction: (Ge) ? Ge7Y2 , Liq (calculated 1113 K, measured 1093 K) and Ge10Y11 , Liq ? Ge4Y5 (calculated 2157 K, measured 2173 K). |
| Phase transition | 1703 K | 1703 | polymorphic | experimental | [1] Idbenali 2013 cites Schmidt 1972 doi | p. 1 report | A polymorphic transition (Ge1.5Y_LT , Ge1.5Y_HT) was determined at 1703 K for Ge1.5Y in [1]. |
| Phase transition | 1710 K | 1710 | polymorphic | model | [1] Idbenali 2013 | p. 4 report | It is necessary to use all the digits of the optimized parameters listed in Table 3 for the calculation of the polymorphic transition temperature between the polytypes at T = 1710 K. |
| Phase transition | 2157 K | 2157 | Ge10Y11 , Liq ? Ge4Y5 | model | [1] Idbenali 2013 | p. 4 report | The temperature of invariant reactions fits well the experiments [1] except both the temperature of the invariant reaction: (Ge) ? Ge7Y2 , Liq (calculated 1113 K, measured 1093 K) and Ge10Y11 , Liq ? Ge4Y5 (calculated 2157 K, measured 2173 K). |
| Phase transition | 2173 K | 2173 | Ge10Y11 , Liq ? Ge4Y5 | experimental | [1] Idbenali 2013 cites Schmidt 1972 doi | p. 4 report | The temperature of invariant reactions fits well the experiments [1] except both the temperature of the invariant reaction: (Ge) ? Ge7Y2 , Liq (calculated 1113 K, measured 1093 K) and Ge10Y11 , Liq ? Ge4Y5 (calculated 2157 K, measured 2173 K). |
| Phase transition | 2238 K | 2238 | Ge3Y5 -> Liq Ge3Y5: Y 0.625; L: Y 0.625 | experimental | [1] Idbenali 2013 cites Schmidt 1972 doi | Table 3, p. 4, row 21 report | |
| Phase transition | 2238 K | 2238 | congruent melting | experimental | [1] Idbenali 2013 | p. 1 report | For the Ge3Y5 compound, a congruent melting was determined at 2238 K; for the Ge4Y5, Ge10Y11, GeY, Ge1.5Y-LT, Ge1.5Y-HT, Ge5Y3, Ge2Y and Ge7Y2 compounds, a peritectic formation was reported, respectively, at 2218, 2173, 2003, 1733, 1183, 1153, and 1133 K see Fig. 1. |
| Phase transition | 2241 K | 2241 | Ge3Y5 -> Liq Ge3Y5: Y 0.625; L: Y 0.625 | model | [1] Idbenali 2013 | Table 3, p. 4, row 22 report |
Sources
Reporting papers the values were read from (a value cited from another work names that work in its row).
- Mohamed Idbenali, Colette Servant, Thermodynamic optimization of the germanium–yttrium system, J Therm Anal Calorim 111, 911-916 (2013). doi:10.1007/s10973-012-2271-0