Ba–Pb system
74 accepted literature values from 1 paper(s) (experimental 19, model 55); 1 calculated phase diagram(s). 9 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 (11) · papers (bibliography) · Markdown
| Evidence class | Values |
|---|---|
| experimental | 19 |
| model | 55 |
| Property group | Values |
|---|---|
| invariant reaction | 30 |
| phase transition | 17 |
| formation | 27 |
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 |
|---|---|---|---|
| BaPb-07Idb.tdb | M. Idbenali, C. Servant, N. Selhaoui, L. Bouirden, Calphad, 31, 479-89(2007). doi:10.1016/j.calphad.2007.04.003 | faf589a587c1792e24f7e6f91e38d497c3f3a318844137a56366cca5ec2f1d7e | viewer · TDB · JSON |
| TDB file | T (K) | Phases at the invariant |
|---|---|---|
| BaPb-07Idb.tdb | 1184.64 | LIQUID (x(Pb) 0.2756) + BA2PB_C37 (x(Pb) 0.33333) + BA5PB3_D8L (x(Pb) 0.375) |
| BaPb-07Idb.tdb | 1126.91 | BA5PB3_D8L (x(Pb) 0.375) + BAPB_B33 (x(Pb) 0.5) + LIQUID (x(Pb) 0.52376) |
| BaPb-07Idb.tdb | 1105.53 | BAPB_B33 (x(Pb) 0.5) + LIQUID (x(Pb) 0.5567) + BA17PB23 (x(Pb) 0.575) |
| BaPb-07Idb.tdb | 986.14 | BA17PB23 (x(Pb) 0.575) + BA3PB5_HT (x(Pb) 0.625) + LIQUID (x(Pb) 0.65805) |
| BaPb-07Idb.tdb | 977.58 | BA17PB23 (x(Pb) 0.575) + BA3PB5_LT (x(Pb) 0.625) + BA3PB5_HT (x(Pb) 0.625) |
| BaPb-07Idb.tdb | 977.58 | BA3PB5_LT (x(Pb) 0.625) + BA3PB5_HT (x(Pb) 0.625) + LIQUID (x(Pb) 0.66514) |
| BaPb-07Idb.tdb | 923.32 | BCC_A2 (x(Pb) 0.00133) + LIQUID (x(Pb) 0.05472) + BA2PB_C37 (x(Pb) 0.33333) |
| BaPb-07Idb.tdb | 870.28 | BA3PB5_LT (x(Pb) 0.625) + LIQUID (x(Pb) 0.72181) + BAPB3 (x(Pb) 0.75) |
| BaPb-07Idb.tdb | 563.12 | BAPB3 (x(Pb) 0.75) + LIQUID (x(Pb) 0.95796) + FCC_A1 (x(Pb) 0.99184) |
Convex hulls: Materials Project DFT hull · OQMD DFT hull
Invariant reactions (literature)
| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---|---|---|---|---|---|---|
| 1196.15 | peritectic: Ba2Pb <=> Liq + Ba5Pb3 | Ba2Pb: Pb 0.333333; Liq: Pb 0.3328; Ba5Pb3: Pb 0.375 | model | [1] Idbenali 2007 | Table 4, p. 7, row 6 report | |
| 1189.15 | peritectic: Ba2Pb <=> Liq + Ba5Pb3 | Ba2Pb: Pb 0.3; Ba5Pb3: Pb 0.375 | experimental | [1] Idbenali 2007 cites Bruzzone 1977 doi | Table 4, p. 7, row 5 report | |
| 1188.15 | peritectic: Ba2Pb <=> Liq + Ba5Pb3 | Ba2Pb: Pb 0.333333; Liq: Pb 0.2775; Ba5Pb3: Pb 0.375 | model | [1] Idbenali 2007 | Table 4, p. 7, row 7 report | |
| 1187.15 | peritectic: Ba2Pb <=> Liq + Ba5Pb3 | Ba2Pb: Pb 0.333333; Liq: Pb 0.2779; Ba5Pb3: Pb 0.375 | model | [1] Idbenali 2007 | Table 4, p. 7, row 8 report | |
| 1140.15 | eutectic: BaPb + Ba5Pb3 <=> Liq | BaPb: Pb 0.5; Ba5Pb3: Pb 0.375; Liq: Pb 0.449 | model | [1] Idbenali 2007 | Table 4, p. 7, row 14 report | |
| 1128.15 | peritectic: Liq + Ba5Pb3 <=> BaPb | Liq: Pb 0.55; Ba5Pb3: Pb 0.375; BaPb: Pb 0.5 | experimental | [1] Idbenali 2007 cites Bruzzone 1977 doi | Table 4, p. 7, row 15 report | |
| 1128.15 | peritectic: Liq + Ba5Pb3 <=> BaPb | Liq: Pb 0.5239; Ba5Pb3: Pb 0.375; BaPb: Pb 0.5 | model | [1] Idbenali 2007 | Table 4, p. 7, row 16 report | |
| 1127.15 | peritectic: Liq + Ba5Pb3 <=> BaPb | Liq: Pb 0.5238; Ba5Pb3: Pb 0.375; BaPb: Pb 0.5 | model | [1] Idbenali 2007 | Table 4, p. 7, row 17 report | |
| 1105.65 | eutectic: BaPb + Ba0.425Pb0.575 <=> Liq | BaPb: Pb 0.5; Ba0.425Pb0.575: Pb 0.575; Liq: Pb 0.5567 | model | [1] Idbenali 2007 | Table 4, p. 7, row 21 report | |
| 1105.15 | eutectic: BaPb + Ba0.425Pb0.575 <=> Liq | BaPb: Pb 0.5; Ba0.425Pb0.575: Pb 0.575; Liq: Pb 0.5402 | model | [1] Idbenali 2007 | Table 4, p. 7, row 20 report | |
| 999.15 | eutectic: BaPb + βBa3Pb5 <=> Liq | BaPb: Pb 0.5; βBa3Pb5: Pb 0.625 | experimental | [1] Idbenali 2007 cites Bruzzone 1977 doi | Table 4, p. 7, row 26 report | |
| 998.65 | eutectic: BaPb + βBa3Pb5 <=> Liq | BaPb: Pb 0.5; βBa3Pb5: Pb 0.625; Liq: Pb 0.6048 | model | [1] Idbenali 2007 | Table 4, p. 7, row 28 report | |
| 998.25 | peritectic: Ba0.425Pb0.575 + Liq <=> βBa3Pb5 | Ba0.425Pb0.575: Pb 0.575; Liq: Pb 0.6812; βBa3Pb5: Pb 0.625 | model | [1] Idbenali 2007 | Table 4, p. 7, row 24 report | |
| 988.35 | eutectic: BaPb + βBa3Pb5 <=> Liq | BaPb: Pb 0.5; βBa3Pb5: Pb 0.625; Liq: Pb 0.6229 | model | [1] Idbenali 2007 | Table 4, p. 7, row 27 report | |
| 986.35 | peritectic: Ba0.425Pb0.575 + Liq <=> βBa3Pb5 | Ba0.425Pb0.575: Pb 0.575; Liq: Pb 0.658; βBa3Pb5: Pb 0.625 | model | [1] Idbenali 2007 | Table 4, p. 7, row 25 report | |
| 978.65 | peritectic: Ba0.425Pb0.575 + Liq <=> αBa3Pb5 | Ba0.425Pb0.575: Pb 0.575; Liq: Pb 0.6959; αBa3Pb5: Pb 0.625 | model | [1] Idbenali 2007 | Table 4, p. 7, row 29 report | |
| 977.75 | peritectic: Liq + BaPb <=> αBa3Pb5 | Liq: Pb 0.6664; BaPb: Pb 0.5; αBa3Pb5: Pb 0.625 | model | [1] Idbenali 2007 | Table 4, p. 7, row 36 report | |
| 977.75 | peritectic: Ba0.425Pb0.575 + Liq <=> αBa3Pb5 | Ba0.425Pb0.575: Pb 0.575; Liq: Pb 0.6651; αBa3Pb5: Pb 0.625 | model | [1] Idbenali 2007 | Table 4, p. 7, row 30 report | |
| 976.85 | peritectic: Liq + BaPb <=> αBa3Pb5 | Liq: Pb 0.6608; BaPb: Pb 0.5; αBa3Pb5: Pb 0.625 | model | [1] Idbenali 2007 | Table 4, p. 7, row 35 report | |
| 927.15 | eutectic: (Ba) + Ba2Pb <=> Liq | (Ba): Pb 0.15; Ba2Pb: Pb 0.333333 | experimental | [1] Idbenali 2007 cites Bruzzone 1977 doi | Table 4, p. 7, row 1 report | |
| 925.25 | eutectic: (Ba) + Ba2Pb <=> Liq | (Ba): Pb 0; Ba2Pb: Pb 0.333333; Liq: Pb 0.1568 | model | [1] Idbenali 2007 | Table 4, p. 7, row 2 report | |
| 924.55 | eutectic: (Ba) + Ba2Pb <=> Liq | (Ba): Pb 0; Ba2Pb: Pb 0.333333; Liq: Pb 0.0541 | model | [1] Idbenali 2007 | Table 4, p. 7, row 3 report | |
| 924.15 | eutectic: (Ba) + Ba2Pb <=> Liq | (Ba): Pb 0; Ba2Pb: Pb 0.333333; Liq: Pb 0.0543 | model | [1] Idbenali 2007 | Table 4, p. 7, row 4 report | |
| 876.15 | eutectic: αBa3Pb5 + BaPb3 <=> Liq | αBa3Pb5: Pb 0.625; BaPb3: Pb 0.75; Liq: Pb 0.7449 | model | [1] Idbenali 2007 | Table 4, p. 7, row 43 report | |
| 873.85 | eutectic: αBa3Pb5 + BaPb3 <=> Liq | αBa3Pb5: Pb 0.625; BaPb3: Pb 0.75; Liq: Pb 0.7321 | model | [1] Idbenali 2007 | Table 4, p. 7, row 42 report | |
| 870.45 | eutectic: αBa3Pb5 + BaPb3 <=> Liq | αBa3Pb5: Pb 0.625; BaPb3: Pb 0.75; Liq: Pb 0.7218 | model | [1] Idbenali 2007 | Table 4, p. 7, row 45 report | |
| 870.05 | eutectic: αBa3Pb5 + BaPb3 <=> Liq | αBa3Pb5: Pb 0.625; BaPb3: Pb 0.75; Liq: Pb 0.7226 | model | [1] Idbenali 2007 | Table 4, p. 7, row 44 report | |
| 863.15 | eutectic: αBa3Pb5 + BaPb3 <=> Liq | αBa3Pb5: Pb 0.7; BaPb3: Pb 0.75 | experimental | [1] Idbenali 2007 cites Bruzzone 1977 doi | Table 4, p. 7, row 41 report | |
| 563.15 | eutectic: Liq <=> (Pb) + BaPb3 | BaPb3: Pb 0.75 | experimental | [1] Idbenali 2007 cites Bruzzone 1977 doi | Table 4, p. 7, row 46 report | |
| 562.95 | eutectic: Liq <=> (Pb) + BaPb3 | Liq: Pb 0.9562; BaPb3: Pb 0.75 | model | [1] Idbenali 2007 | Table 4, p. 7, row 47 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 |
|---|---|---|---|---|---|---|---|---|---|
| Ba0.25Pb0.75 | BaPb3 | -49.434 kJ/mol-atom | 300 | model | -35.948 (mp-aaaabfsw) | -35.568 (oqmd-10854) | [1] Idbenali 2007 | Table 5, p. 9, row 27 report | |
| Ba0.25Pb0.75 | BaPb3 | -47.202 kJ/mol-atom | 300 | model | -35.948 (mp-aaaabfsw) | -35.568 (oqmd-10854) | [1] Idbenali 2007 | Table 5, p. 9, row 29 report | |
| Ba0.25Pb0.75 | BaPb3 | -46 kJ/mol-atom ± 2 | 300 | experimental | -35.948 (mp-aaaabfsw) | -35.568 (oqmd-10854) | [1] Idbenali 2007 cites Conclusion | Table 5, p. 9, row 28 report | |
| Ba0.25Pb0.75 | BaPb3 | -44 kJ/mol-atom ± 2 | 300 | experimental | -35.948 (mp-aaaabfsw) | -35.568 (oqmd-10854) | [1] Idbenali 2007 cites Kubaschewski 1949 | Table 5, p. 9, row 30 report | |
| Ba0.425Pb0.575 | -68.449 kJ/mol-atom | 300 | model | [1] Idbenali 2007 | Table 5, p. 9, row 16 report | ||||
| Ba0.425Pb0.575 | -67.7 kJ/mol-atom ± 2 | 300 | experimental | [1] Idbenali 2007 cites Conclusion | Table 5, p. 9, row 17 report | ||||
| Ba0.425Pb0.575 | -65.055 kJ/mol-atom | 300 | model | [1] Idbenali 2007 | Table 5, p. 9, row 18 report | ||||
| Ba0.5Pb0.5 | BaPb | -101 kJ/mol-atom | 300 | model | -56.755 (mp-aaaabdum) | -56.392 (oqmd-10853) | [1] Idbenali 2007 cites F 2007 | Table 5, p. 9, row 13 report | |
| Ba0.5Pb0.5 | BaPb | -76.223 kJ/mol-atom | 300 | model | -56.755 (mp-aaaabdum) | -56.392 (oqmd-10853) | [1] Idbenali 2007 | Table 5, p. 9, row 11 report | |
| Ba0.5Pb0.5 | BaPb | -75.3 kJ/mol-atom ± 12 | 300 | experimental | -56.755 (mp-aaaabdum) | -56.392 (oqmd-10853) | [1] Idbenali 2007 cites Kubaschewski 1949 | Table 5, p. 9, row 15 report | |
| Ba0.5Pb0.5 | BaPb | -74.454 kJ/mol-atom | 300 | model | -56.755 (mp-aaaabdum) | -56.392 (oqmd-10853) | [1] Idbenali 2007 | Table 5, p. 9, row 14 report | |
| Ba0.5Pb0.5 | BaPb | -73 kJ/mol-atom ± 2 | 300 | experimental | -56.755 (mp-aaaabdum) | -56.392 (oqmd-10853) | [1] Idbenali 2007 cites Conclusion | Table 5, p. 9, row 12 report | |
| Ba0.625Pb0.375 | Ba5Pb3 | -69 kJ/mol-atom ± 2 | 300 | experimental | -51.899 (mp-aaabjkhe) | -51.776 (oqmd-10856) | [1] Idbenali 2007 cites Conclusion | Table 5, p. 9, row 7 report | |
| Ba0.625Pb0.375 | Ba5Pb3 | -68.993 kJ/mol-atom | 300 | model | -51.899 (mp-aaabjkhe) | -51.776 (oqmd-10856) | [1] Idbenali 2007 | Table 5, p. 9, row 6 report | |
| Ba0.625Pb0.375 | Ba5Pb3 | -68.54 kJ/mol-atom | 300 | model | -51.899 (mp-aaabjkhe) | -51.776 (oqmd-10856) | [1] Idbenali 2007 | Table 5, p. 9, row 5 report | |
| Ba0.6667Pb0.3333 | Ba2Pb | -96 kJ/mol-atom ± 12 | 300 | experimental | -52.226 (mp-aaaabfle) | -52.132 (oqmd-10855) | [1] Idbenali 2007 cites Kubaschewski 1949 | Table 5, p. 9, row 4 report | |
| Ba0.6667Pb0.3333 | Ba2Pb | -67.814 kJ/mol-atom | 300 | model | -52.226 (mp-aaaabfle) | -52.132 (oqmd-10855) | [1] Idbenali 2007 | Table 5, p. 9, row 3 report | |
| Ba0.6667Pb0.3333 | Ba2Pb | -67 kJ/mol-atom ± 2 | 300 | experimental | -52.226 (mp-aaaabfle) | -52.132 (oqmd-10855) | [1] Idbenali 2007 cites Conclusion | Table 5, p. 9, row 2 report | |
| Ba0.6667Pb0.3333 | Ba2Pb | -64.24 kJ/mol-atom | 300 | model | -52.226 (mp-aaaabfle) | -52.132 (oqmd-10855) | [1] Idbenali 2007 | Table 5, p. 9, row 1 report | |
| αBa0.375Pb0.625 | Ba3Pb5 | -62.811 kJ/mol-atom | 300 | model | -48.835 (mp-aaabjxih) | -48.642 (oqmd-20937) | [1] Idbenali 2007 | Table 5, p. 9, row 25 report | |
| αBa0.375Pb0.625 | Ba3Pb5 | -62.709 kJ/mol-atom | 300 | model | -48.835 (mp-aaabjxih) | -48.642 (oqmd-20937) | [1] Idbenali 2007 | Table 5, p. 9, row 23 report | |
| αBa0.375Pb0.625 | Ba3Pb5 | -60 kJ/mol-atom ± 2 | 300 | experimental | -48.835 (mp-aaabjxih) | -48.642 (oqmd-20937) | [1] Idbenali 2007 cites Conclusion | Table 5, p. 9, row 24 report | |
| αBa0.375Pb0.625 | Ba3Pb5 | -59.844 kJ/mol-atom | 300 | model | -48.835 (mp-aaabjxih) | -48.642 (oqmd-20937) | [1] Idbenali 2007 | Table 5, p. 9, row 26 report | |
| βBa0.375Pb0.625 | Ba3Pb5 | -62.809 kJ/mol-atom | 300 | model | -48.835 (mp-aaabjxih) | -48.642 (oqmd-20937) | [1] Idbenali 2007 | Table 5, p. 9, row 21 report | |
| βBa0.375Pb0.625 | Ba3Pb5 | -62.708 kJ/mol-atom | 300 | model | -48.835 (mp-aaabjxih) | -48.642 (oqmd-20937) | [1] Idbenali 2007 | Table 5, p. 9, row 19 report | |
| βBa0.375Pb0.625 | Ba3Pb5 | -60 kJ/mol-atom ± 2 | 300 | experimental | -48.835 (mp-aaabjxih) | -48.642 (oqmd-20937) | [1] Idbenali 2007 cites Conclusion | Table 5, p. 9, row 20 report | |
| βBa0.375Pb0.625 | Ba3Pb5 | -59.843 kJ/mol-atom | 300 | model | -48.835 (mp-aaabjxih) | -48.642 (oqmd-20937) | [1] Idbenali 2007 | Table 5, p. 9, row 22 report |
Other properties
Phase transition (17)
| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---|---|---|---|---|---|---|
| Phase transition | 876.35 K | 876.35 | congruent melting: Liq <=> BaPb3 Liq: Pb 0.75; BaPb3: Pb 0.75 | model | [1] Idbenali 2007 | Table 4, p. 7, row 38 report | |
| Phase transition | 878.75 K | 878.75 | congruent melting: Liq <=> BaPb3 Liq: Pb 0.75; BaPb3: Pb 0.75 | model | [1] Idbenali 2007 | Table 4, p. 7, row 39 report | |
| Phase transition | 879.75 K | 879.75 | congruent melting: Liq <=> BaPb3 Liq: Pb 0.75; BaPb3: Pb 0.75 | model | [1] Idbenali 2007 | Table 4, p. 7, row 40 report | |
| Phase transition | 883.15 K | 883.15 | congruent melting: Liq <=> BaPb3 BaPb3: Pb 0.75 | experimental | [1] Idbenali 2007 cites Bruzzone 1977 doi | Table 4, p. 7, row 37 report | |
| Phase transition | 976.85 K | 976.85 | other: αBa3Pb5 <=> βBa3Pb5 αBa3Pb5: Pb 0.625; βBa3Pb5: Pb 0.625 | model | [1] Idbenali 2007 | Table 4, p. 7, row 32 report | |
| Phase transition | 977.75 K | 977.75 | other: αBa3Pb5 <=> βBa3Pb5 αBa3Pb5: Pb 0.625; βBa3Pb5: Pb 0.625 | model | [1] Idbenali 2007 | Table 4, p. 7, row 34 report | |
| Phase transition | 978.15 K | 978.15 | other: αBa3Pb5 <=> βBa3Pb5 αBa3Pb5: Pb 0.625; βBa3Pb5: Pb 0.625 | experimental | [1] Idbenali 2007 cites Bruzzone 1977 doi | Table 4, p. 7, row 31 report | |
| Phase transition | 978.65 K | 978.65 | other: αBa3Pb5 <=> βBa3Pb5 αBa3Pb5: Pb 0.625; βBa3Pb5: Pb 0.625 | model | [1] Idbenali 2007 | Table 4, p. 7, row 33 report | |
| Phase transition | 988.45 K | 988.45 | congruent melting: βBa3Pb5 <=> Liq βBa3Pb5: Pb 0.625; Liq: Pb 0.625 | model | [1] Idbenali 2007 | Table 4, p. 7, row 22 report | |
| Phase transition | 1007.35 K | 1007.35 | congruent melting: βBa3Pb5 <=> Liq βBa3Pb5: Pb 0.625; Liq: Pb 0.625 | model | [1] Idbenali 2007 | Table 4, p. 7, row 23 report | |
| Phase transition | 1111.15 K | 1111.15 | congruent melting: Ba0.425Pb0.575 <=> Liq Ba0.425Pb0.575: Pb 0.575; Liq: Pb 0.575 | model | [1] Idbenali 2007 | Table 4, p. 7, row 19 report | |
| Phase transition | 1115.15 K | 1115.15 | congruent melting: Ba0.425Pb0.575 <=> Liq Ba0.425Pb0.575: Pb 0.575; Liq: Pb 0.575 | model | [1] Idbenali 2007 | Table 4, p. 7, row 18 report | |
| Phase transition | 1171.15 K | 1171.15 | congruent melting: BaPb <=> Liq BaPb: Pb 0.5; Liq: Pb 0.5 | model | [1] Idbenali 2007 | Table 4, p. 7, row 13 report | |
| Phase transition | 1240.15 K | 1240.15 | congruent melting: Liq <=> Ba5Pb3 Liq: Pb 0.375; Ba5Pb3: Pb 0.375 | model | [1] Idbenali 2007 | Table 4, p. 7, row 10 report | |
| Phase transition | 1243.15 K | 1243.15 | congruent melting: Liq <=> Ba5Pb3 Ba5Pb3: Pb 0.375 | experimental | [1] Idbenali 2007 cites Bruzzone 1977 doi | Table 4, p. 7, row 9 report | |
| Phase transition | 1244.15 K | 1244.15 | congruent melting: Liq <=> Ba5Pb3 Liq: Pb 0.375; Ba5Pb3: Pb 0.375 | model | [1] Idbenali 2007 | Table 4, p. 7, row 12 report | |
| Phase transition | 1245.15 K | 1245.15 | congruent melting: Liq <=> Ba5Pb3 Liq: Pb 0.375; Ba5Pb3: Pb 0.375 | model | [1] Idbenali 2007 | Table 4, p. 7, row 11 report |
Sources
Reporting papers the values were read from (a value cited from another work names that work in its row).
- M. Idbenali, C. Servant, N. Selhaoui, L. Bouirden, A thermodynamic modelling of the Ba–Pb system, Calphad 31, 479-489 (2007). doi:10.1016/j.calphad.2007.04.003