# Al–Sr system

> Al–Sr system: 112 accepted literature values (invariant reaction 65, formation 43, phase transition 3, activity / EMF / Gibbs energy 1) and 4 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

HTML: https://data.orchid-project.org/systems/AL-SR.html · Markdown: https://data.orchid-project.org/systems/AL-SR.md

112 accepted literature values from 3 paper(s) (experimental 43, model 26, DFT 43); 4 calculated phase diagram(s). 17 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV.

Data: [JSON](https://data.orchid-project.org/literature/systems/AL-SR.json) · [CSV](https://data.orchid-project.org/systems/AL-SR.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#AL-SR) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#AL-SR/AlSr-03Wan-LB.json) · [phases (8)](https://data.orchid-project.org/phases/pages/AL-SR.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/AL-SR.html) · [Markdown](https://data.orchid-project.org/systems/AL-SR.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 43 |
| model | 26 |
| DFT | 43 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 65 |
| phase transition | 3 |
| formation | 43 |
| activity / EMF / Gibbs energy | 1 |

## 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.

Table: Assessments with a calculated phase diagram

| TDB file | Assessment | SHA-256 | Links |
|---|---|---|---|
| AlSr-03Wan-LB.tdb | C. Wang, Z. Jin, Y. Du, J. Alloys Compd., 358, 288-93(2003). [doi:10.1016/S0925-8388(03)00046-X](https://doi.org/10.1016/S0925-8388%2803%2900046-X) | `2caf2ad6b04dbbc62837bdbe8e88b479240e72ddf83710674d5784217aa8514d` | [viewer](https://orchid-project.org/phase-diagrams/#AL-SR/AlSr-03Wan-LB.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/AlSr-03Wan-LB.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/AlSr-03Wan-LB.json) |
| AlSr-04Zho-RK.tdb | Y. Zhong, C. Wolverton, Y.A. Chang, Z.-K. Liu, Calphad, 52, 2739-54(2004). [doi:10.1016/j.actamat.2004.02.022](https://doi.org/10.1016/j.actamat.2004.02.022) | `967e575d3bcd6d9789a119bc94b4987c2267315e4157d278dcb1b4f165de52e8` | [viewer](https://orchid-project.org/phase-diagrams/#AL-SR/AlSr-04Zho-RK.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/AlSr-04Zho-RK.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/AlSr-04Zho-RK.json) |
| AlSr-04Zho-ass.tdb | Y. Zhong, C. Wolverton, Y.A. Chang, Z.-K. Liu, Calphad, 52, 2739-54(2004). [doi:10.1016/j.actamat.2004.02.022](https://doi.org/10.1016/j.actamat.2004.02.022) | `1ee19ea419966799c5314b1441f2dd73aeffef6915b77d5071be332d0fda62a6` | [viewer](https://orchid-project.org/phase-diagrams/#AL-SR/AlSr-04Zho-ass.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/AlSr-04Zho-ass.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/AlSr-04Zho-ass.json) |
| AlSr-14Lia.tdb | S.-M. Liang, M. Engstler, V. Groten, J. Barrirero, F. Muecklich, A. Buehrig-Polaczek, R. Schmid-Fetzer, J. Alloys Compd., 610, 443-50(2014). [doi:10.1016/j.jallcom.2014.05.018](https://doi.org/10.1016/j.jallcom.2014.05.018) | `1fa45401a85a4430ea2eeeea089f261e20f3c655f4f1649d988ed43f81783b9a` | [viewer](https://orchid-project.org/phase-diagrams/#AL-SR/AlSr-14Lia.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/AlSr-14Lia.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/AlSr-14Lia.json) |

Table: Calculated three-phase invariants (model, mole fraction of the second component)

| TDB file | T (K) | Phases at the invariant |
|---|---:|---|
| AlSr-03Wan-LB.tdb | 1201.3 | AL4SR_D13 (x(Sr) 0.2) + AL2SR (x(Sr) 0.33333) + LIQUID (x(Sr) 0.34877) |
| AlSr-03Wan-LB.tdb | 1201.3 | AL4SR_D13 (x(Sr) 0.2) + AL2SR (x(Sr) 0.33333) + LIQUID (x(Sr) 0.34885) |
| AlSr-03Wan-LB.tdb | 1201.3 | AL4SR_D13 (x(Sr) 0.2) + AL2SR (x(Sr) 0.33333) + LIQUID (x(Sr) 0.34859) |
| AlSr-03Wan-LB.tdb | 1050 | AL4SR_D13 (x(Sr) 0.2) + BCC_A2 (x(Sr) 1) + LIQUID (x(Sr) 1) |
| AlSr-03Wan-LB.tdb | 937.63 | AL2SR (x(Sr) 0.33333) + AL7SR8 (x(Sr) 0.53333) + LIQUID (x(Sr) 0.62297) |
| AlSr-03Wan-LB.tdb | 937.63 | AL2SR (x(Sr) 0.33333) + AL7SR8 (x(Sr) 0.53333) + LIQUID (x(Sr) 0.62271) |
| AlSr-03Wan-LB.tdb | 937.63 | AL2SR (x(Sr) 0.33333) + AL7SR8 (x(Sr) 0.53333) + LIQUID (x(Sr) 0.62303) |
| AlSr-03Wan-LB.tdb | 924.67 | FCC_A1 (x(Sr) 0) + LIQUID (x(Sr) 0.01164) + AL4SR_D13 (x(Sr) 0.2) |
| AlSr-03Wan-LB.tdb | 924.67 | FCC_A1 (x(Sr) 0) + LIQUID (x(Sr) 0.01156) + AL4SR_D13 (x(Sr) 0.2) |
| AlSr-03Wan-LB.tdb | 851.91 | AL7SR8 (x(Sr) 0.53333) + LIQUID (x(Sr) 0.73548) + BCC_A2 (x(Sr) 1) |
| AlSr-03Wan-LB.tdb | 851.91 | AL7SR8 (x(Sr) 0.53333) + LIQUID (x(Sr) 0.73592) + BCC_A2 (x(Sr) 1) |
| AlSr-03Wan-LB.tdb | 820 | AL7SR8 (x(Sr) 0.53333) + FCC_A1 (x(Sr) 1) + BCC_A2 (x(Sr) 1) |
| AlSr-04Zho-RK.tdb | 1195.24 | AL4SR_D13 (x(Sr) 0.2) + LIQUID (x(Sr) 0.33256) + AL2SR (x(Sr) 0.33333) |
| AlSr-04Zho-RK.tdb | 1195.24 | AL4SR_D13 (x(Sr) 0.2) + LIQUID (x(Sr) 0.33273) + AL2SR (x(Sr) 0.33333) |
| AlSr-04Zho-RK.tdb | 1195.24 | AL4SR_D13 (x(Sr) 0.2) + LIQUID (x(Sr) 0.33212) + AL2SR (x(Sr) 0.33333) |
| AlSr-04Zho-RK.tdb | 1050 | AL4SR_D13 (x(Sr) 0.2) + BCC_A2 (x(Sr) 1) + LIQUID (x(Sr) 1) |
| AlSr-04Zho-RK.tdb | 941.4 | AL2SR (x(Sr) 0.33333) + AL7SR8 (x(Sr) 0.53333) + LIQUID (x(Sr) 0.56058) |
| AlSr-04Zho-RK.tdb | 941.4 | AL2SR (x(Sr) 0.33333) + AL7SR8 (x(Sr) 0.53333) + LIQUID (x(Sr) 0.56063) |
| AlSr-04Zho-RK.tdb | 941.4 | AL2SR (x(Sr) 0.33333) + AL7SR8 (x(Sr) 0.53333) + LIQUID (x(Sr) 0.56046) |
| AlSr-04Zho-RK.tdb | 924.96 | FCC_A1 (x(Sr) 0) + LIQUID (x(Sr) 0.01127) + AL4SR_D13 (x(Sr) 0.2) |
| AlSr-04Zho-RK.tdb | 924.96 | FCC_A1 (x(Sr) 0) + LIQUID (x(Sr) 0.01119) + AL4SR_D13 (x(Sr) 0.2) |
| AlSr-04Zho-RK.tdb | 864.19 | AL3SR8 (x(Sr) 0.72727) + LIQUID (x(Sr) 0.78259) + BCC_A2 (x(Sr) 0.99878) |
| AlSr-04Zho-RK.tdb | 864.19 | AL3SR8 (x(Sr) 0.72727) + LIQUID (x(Sr) 0.78278) + BCC_A2 (x(Sr) 0.99878) |
| AlSr-04Zho-RK.tdb | 857.44 | AL7SR8 (x(Sr) 0.53333) + LIQUID (x(Sr) 0.67106) + AL3SR8 (x(Sr) 0.72727) |
| AlSr-04Zho-RK.tdb | 857.44 | AL7SR8 (x(Sr) 0.53333) + LIQUID (x(Sr) 0.67132) + AL3SR8 (x(Sr) 0.72727) |
| AlSr-04Zho-RK.tdb | 828.96 | AL3SR8 (x(Sr) 0.72727) + FCC_A1 (x(Sr) 0.99776) + BCC_A2 (x(Sr) 0.99907) |
| AlSr-04Zho-RK.tdb | 828.96 | AL3SR8 (x(Sr) 0.72727) + FCC_A1 (x(Sr) 0.99777) + BCC_A2 (x(Sr) 0.99908) |
| AlSr-04Zho-RK.tdb | 615.46 | AL7SR8 (x(Sr) 0.53333) + AL3SR8 (x(Sr) 0.72727) + FCC_A1 (x(Sr) 0.99963) |
| AlSr-04Zho-RK.tdb | 615.46 | AL7SR8 (x(Sr) 0.53333) + AL3SR8 (x(Sr) 0.72727) + FCC_A1 (x(Sr) 0.99963) |
| AlSr-04Zho-RK.tdb | 615.46 | AL7SR8 (x(Sr) 0.53333) + AL3SR8 (x(Sr) 0.72727) + FCC_A1 (x(Sr) 0.99963) |
| AlSr-04Zho-RK.tdb | 615.46 | AL7SR8 (x(Sr) 0.53333) + AL3SR8 (x(Sr) 0.72727) + FCC_A1 (x(Sr) 0.99963) |
| AlSr-04Zho-ass.tdb | 1196.21 | AL4SR_D13 (x(Sr) 0.2) + LIQUID (x(Sr) 0.31534) + AL2SR (x(Sr) 0.33333) |
| AlSr-04Zho-ass.tdb | 935.68 | AL2SR (x(Sr) 0.33333) + AL7SR8 (x(Sr) 0.53333) + LIQUID (x(Sr) 0.55499) |
| AlSr-04Zho-ass.tdb | 928.83 | FCC_A1 (x(Sr) 0) + LIQUID (x(Sr) 0.00671) + AL4SR_D13 (x(Sr) 0.2) |
| AlSr-04Zho-ass.tdb | 871.2 | AL7SR8 (x(Sr) 0.53333) + LIQUID (x(Sr) 0.67967) + AL3SR8 (x(Sr) 0.72727) |
| AlSr-04Zho-ass.tdb | 860.39 | AL3SR8 (x(Sr) 0.72727) + LIQUID (x(Sr) 0.80098) + BCC_A2 (x(Sr) 0.99908) |
| AlSr-04Zho-ass.tdb | 826.86 | AL3SR8 (x(Sr) 0.72727) + FCC_A1 (x(Sr) 0.99829) + BCC_A2 (x(Sr) 0.99929) |
| AlSr-04Zho-ass.tdb | 826.86 | AL3SR8 (x(Sr) 0.72727) + FCC_A1 (x(Sr) 0.99829) + BCC_A2 (x(Sr) 0.9993) |
| AlSr-04Zho-ass.tdb | 673.79 | AL7SR8 (x(Sr) 0.53333) + AL3SR8 (x(Sr) 0.72727) + FCC_A1 (x(Sr) 0.99947) |
| AlSr-04Zho-ass.tdb | 673.79 | AL7SR8 (x(Sr) 0.53333) + AL3SR8 (x(Sr) 0.72727) + FCC_A1 (x(Sr) 0.99947) |
| AlSr-14Lia.tdb | 1195.99 | AL4SR_D13 (x(Sr) 0.2) + AL2SR (x(Sr) 0.33333) + LIQUID (x(Sr) 0.35142) |
| AlSr-14Lia.tdb | 1195.99 | AL4SR_D13 (x(Sr) 0.2) + AL2SR (x(Sr) 0.33333) + LIQUID (x(Sr) 0.35148) |
| AlSr-14Lia.tdb | 1195.99 | AL4SR_D13 (x(Sr) 0.2) + AL2SR (x(Sr) 0.33333) + LIQUID (x(Sr) 0.35112) |
| AlSr-14Lia.tdb | 940.86 | AL2SR (x(Sr) 0.33333) + AL7SR8 (x(Sr) 0.53333) + LIQUID (x(Sr) 0.56117) |
| AlSr-14Lia.tdb | 940.86 | AL2SR (x(Sr) 0.33333) + AL7SR8 (x(Sr) 0.53333) + LIQUID (x(Sr) 0.5613) |
| AlSr-14Lia.tdb | 940.86 | AL2SR (x(Sr) 0.33333) + AL7SR8 (x(Sr) 0.53333) + LIQUID (x(Sr) 0.561) |
| AlSr-14Lia.tdb | 928.58 | FCC_A1 (x(Sr) 2.000e-5) + LIQUID (x(Sr) 0.00681) + AL4SR_D13 (x(Sr) 0.2) |
| AlSr-14Lia.tdb | 928.58 | FCC_A1 (x(Sr) 2.000e-5) + LIQUID (x(Sr) 0.00674) + AL4SR_D13 (x(Sr) 0.2) |
| AlSr-14Lia.tdb | 863.99 | AL3SR8 (x(Sr) 0.72727) + LIQUID (x(Sr) 0.78247) + BCC_A2 (x(Sr) 0.99878) |
| AlSr-14Lia.tdb | 863.99 | AL3SR8 (x(Sr) 0.72727) + LIQUID (x(Sr) 0.78265) + BCC_A2 (x(Sr) 0.99878) |
| AlSr-14Lia.tdb | 857.22 | AL7SR8 (x(Sr) 0.53333) + LIQUID (x(Sr) 0.67137) + AL3SR8 (x(Sr) 0.72727) |
| AlSr-14Lia.tdb | 857.21 | AL7SR8 (x(Sr) 0.53333) + LIQUID (x(Sr) 0.6711) + AL3SR8 (x(Sr) 0.72727) |
| AlSr-14Lia.tdb | 815.11 | AL3SR8 (x(Sr) 0.72727) + BCC_A2 (x(Sr) 0.99917) + FCC_A1 (x(Sr) 0.99992) |
| AlSr-14Lia.tdb | 815.11 | AL3SR8 (x(Sr) 0.72727) + BCC_A2 (x(Sr) 0.99918) + FCC_A1 (x(Sr) 0.99992) |
| AlSr-14Lia.tdb | 615.07 | AL7SR8 (x(Sr) 0.53333) + AL3SR8 (x(Sr) 0.72727) + FCC_A1 (x(Sr) 1) |
| AlSr-14Lia.tdb | 615.07 | AL7SR8 (x(Sr) 0.53333) + AL3SR8 (x(Sr) 0.72727) + FCC_A1 (x(Sr) 1) |
| AlSr-14Lia.tdb | 615.07 | AL7SR8 (x(Sr) 0.53333) + AL3SR8 (x(Sr) 0.72727) + FCC_A1 (x(Sr) 1) |

Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/AL/AL-SR.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/AL/AL-SR.json) · [CALPHAD hull AlSr-03Wan-LB](https://data.orchid-project.org/hulls/calphad-sgte/AL/AL-SR--AlSr-03Wan-LB.json) · [CALPHAD hull AlSr-04Zho-RK](https://data.orchid-project.org/hulls/calphad-sgte/AL/AL-SR--AlSr-04Zho-RK.json) · [CALPHAD hull AlSr-04Zho-ass](https://data.orchid-project.org/hulls/calphad-sgte/AL/AL-SR--AlSr-04Zho-ass.json)

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Al–Sr system (65)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 1316.15 | congruent melting: Liquid = SrAl4 | L: Al 0.8, Sr 0.2 (basis unresolved); SrAl4: Al 0.8, Sr 0.2 (basis unresolved) | model | [1] Liang 2014; _cites Zhong 2004_ [doi](https://doi.org/10.1016/j.actamat.2004.02.022) | Table 5, p. 6, row 17; `ORC-ZYHCIGD63Q` |  |
| 1313.15 | congruent melting: Liquid = SrAl4 | L: Al 0.8, Sr 0.2; SrAl4: Al 0.8, Sr 0.2 | experimental | [1] Liang 2014; _cites Vakhobov 1979_ | Table 5, p. 6, row 13; `ORC-FOBESNRPFN` |  |
| 1313.15 | congruent melting: Liquid = SrAl4 | L: Al 0.8, Sr 0.2; SrAl4: Al 0.8, Sr 0.2 | experimental | [1] Liang 2014; _cites Conclusion_ | Table 5, p. 6, row 12; `ORC-IFG6BRMCEK` |  |
| 1313.15 | congruent melting: SrAl4->L | SrAl4: Al 0.8, Sr 0.2; L: Al 0.8, Sr 0.2 | experimental | [2] Wang 2003 | Table 1, p. 2, row 2; `ORC-L7Z5GQ7JXI` |  |
| 1313.15 | congruent melting: SrAl4->L | SrAl4: Al 0.8, Sr 0.2; L: Sr 0.25 | model | [2] Wang 2003; _cites Du 2002_ | Table 1, p. 2, row 6; `ORC-V72J5FHZF2` |  |
| 1313.15 | congruent melting: SrAl4->L | SrAl4: Al 0.8, Sr 0.2; L: Sr 0.25 | experimental | [2] Wang 2003; _cites Bruzzone 1975_ [doi](https://doi.org/10.1016/0022-5088%2875%2990212-x) | Table 1, p. 2, row 3; `ORC-YMWZ7BMUVL` |  |
| 1311.15 | congruent melting: Liquid = SrAl4 | L: Al 0.8, Sr 0.2 (basis unresolved); SrAl4: Al 0.8, Sr 0.2 (basis unresolved) | model | [1] Liang 2014 | Table 5, p. 6, row 18; `ORC-RELXQBFEU6` |  |
| 1307.15 | congruent melting: Liquid = SrAl4 | L: Al 0.8, Sr 0.2 (basis unresolved); SrAl4: Al 0.8, Sr 0.2 (basis unresolved) | model | [1] Liang 2014; _cites Wang 2003_ [doi](https://doi.org/10.1016/s0925-8388%2803%2900046-x) | Table 5, p. 6, row 15; `ORC-2DVA7ERGX7` |  |
| 1307.15 | congruent melting: SrAl4->L | SrAl4: Al 0.8, Sr 0.2; L: Sr 0.25 | model | [2] Wang 2003 | Table 1, p. 2, row 7; `ORC-HQ26OXOBDH` |  |
| 1298.15 | congruent melting: SrAl4->L | SrAl4: Al 0.8, Sr 0.2; L: Sr 0.25 | experimental | [2] Wang 2003; _cites Vakhobov 1979_ | Table 1, p. 2, row 4; `ORC-BP543R6KRJ` |  |
| 1298.15 | congruent melting: Liquid = SrAl4 | L: Al 0.8, Sr 0.2; SrAl4: Al 0.8, Sr 0.2 | experimental | [1] Liang 2014; _cites Closset 1986_ [doi](https://doi.org/10.1007/bf02665326) | Table 5, p. 6, row 14; `ORC-QSOV6IIIXX` |  |
| 1295.15 | congruent melting: Liquid = SrAl4 | L: Al 0.8, Sr 0.2 (basis unresolved); SrAl4: Al 0.8, Sr 0.2 (basis unresolved) | model | [1] Liang 2014; _cites Zhong 2004_ [doi](https://doi.org/10.1016/j.actamat.2004.02.022) | Table 5, p. 6, row 16; `ORC-D4FJ7KDBOF` |  |
| 1273.15 | congruent melting: Liquid = SrAl4 | L: Al 0.8, Sr 0.2; SrAl4: Al 0.8, Sr 0.2 | experimental | [1] Liang 2014; _cites Vakhobov 1975_ | Table 5, p. 6, row 11; `ORC-KRIEM6RPTI` |  |
| 1273.15 | congruent melting: SrAl4->L | SrAl4: Al 0.8, Sr 0.2; L: Sr 0.25 | experimental | [2] Wang 2003; _cites Burylev 1974_ | Table 1, p. 2, row 1; `ORC-SE3LBXO7KG` |  |
| 1227.15 | eutectic: L⇔(Al)+SrAl4 | L: Sr 0.0085; SrAl4: Al 0.8, Sr 0.2 | experimental | [2] Wang 2003; _cites Sato 1985_ | Table 1, p. 2, row 34; `ORC-DD5CM4AYEO` |  |
| 1213.15 | peritectic: SrAl4+L->SrAl2 | SrAl4: Al 0.8, Sr 0.2; SrAl2: Al 0.666667, Sr 0.333333 | experimental | [2] Wang 2003; _cites Vakhobov 1979_ | Table 1, p. 2, row 9; `ORC-376HMUTDJN` |  |
| 1213.15 | peritectic: Liquid + SrAl4 = SrAl2 | SrAl4: Al 0.8, Sr 0.2; SrAl2: Al 0.666667, Sr 0.333333 | experimental | [1] Liang 2014; _cites Vakhobov 1979_ | Table 5, p. 6, row 20; `ORC-4NCKGOZC4Z` |  |
| 1213 | peritectic |  | experimental | [3] Zhong 2004; _cites Vakhobov 1979_ | p. 3; `ORC-2UBFKGTGHM.8e3cce` | “Particularly, their results agree well with the phase diagram drawn from the results of Bruzzone and Merlo \[7\]: the eutectic reaction on the Sr side was shown at about 77 at.% Sr and 833 K, the melting point of Al4 Sr coincides with the value of Bruzzone and Merlo \[7\]; and the peritectic reactions of formation of Al2 Sr and ÔAl2 Sr3 Õ were given as occurring at 1213 and 951 K, respectively.” |
| 1209.15 | peritectic: SrAl4+L->SrAl2 | SrAl4: Al 0.8, Sr 0.2; SrAl2: Al 0.666667, Sr 0.333333 | experimental | [2] Wang 2003; _cites Bruzzone 1975_ [doi](https://doi.org/10.1016/0022-5088%2875%2990212-x) | Table 1, p. 2, row 8; `ORC-4M55SDLT6P` |  |
| 1209.15 | peritectic: Liquid + SrAl4 = SrAl2 | SrAl4: Al 0.8, Sr 0.2; SrAl2: Al 0.666667, Sr 0.333333 | experimental | [1] Liang 2014; _cites Conclusion_ | Table 5, p. 6, row 19; `ORC-M45R7JIMVU` |  |
| 1209.15 | peritectic: SrAl4+L->SrAl2 | SrAl4: Al 0.8, Sr 0.2; L: Sr 0.34; SrAl2: Al 0.666667, Sr 0.333333 | model | [2] Wang 2003; _cites Du 2002_ | Table 1, p. 2, row 11; `ORC-YAJ2U6Z5CB` |  |
| 1201.15 | peritectic: SrAl4+L->SrAl2 | SrAl4: Al 0.8, Sr 0.2; L: Sr 0.349; SrAl2: Al 0.666667, Sr 0.333333 | model | [2] Wang 2003 | Table 1, p. 2, row 12; `ORC-2YJ7MHLCLE` |  |
| 1201.15 | peritectic: Liquid + SrAl4 = SrAl2 | SrAl4: Al 0.8, Sr 0.2 (basis unresolved); SrAl2: Al 0.666667, Sr 0.333333 (basis unresolved) | model | [1] Liang 2014; _cites Wang 2003_ [doi](https://doi.org/10.1016/s0925-8388%2803%2900046-x) | Table 5, p. 6, row 22; `ORC-XRB4N7J2SI` |  |
| 1196.15 | peritectic: Liquid + SrAl4 = SrAl2 | SrAl4: Al 0.8, Sr 0.2 (basis unresolved); SrAl2: Al 0.666667, Sr 0.333333 (basis unresolved) | model | [1] Liang 2014 | Table 5, p. 6, row 25; `ORC-57OD4V3FYL` |  |
| 1195.15 | peritectic: Liquid + SrAl4 = SrAl2 | SrAl4: Al 0.8, Sr 0.2 (basis unresolved); SrAl2: Al 0.666667, Sr 0.333333 (basis unresolved) | model | [1] Liang 2014; _cites Zhong 2004_ [doi](https://doi.org/10.1016/j.actamat.2004.02.022) | Table 5, p. 6, row 23; `ORC-VKZ54WUNEV` |  |
| 1194.15 | peritectic: Liquid + SrAl4 = SrAl2 | SrAl4: Al 0.8, Sr 0.2 (basis unresolved); SrAl2: Al 0.666667, Sr 0.333333 (basis unresolved) | model | [1] Liang 2014; _cites Zhong 2004_ [doi](https://doi.org/10.1016/j.actamat.2004.02.022) | Table 5, p. 6, row 24; `ORC-3CJCI4U6JD` |  |
| 1193.15 | peritectic: SrAl4+L->SrAl2 | SrAl4: Al 0.8, Sr 0.2; L: Sr 0.344; SrAl2: Al 0.666667, Sr 0.333333 | experimental | [2] Wang 2003; _cites Closset 1986_ [doi](https://doi.org/10.1007/bf02665326) | Table 1, p. 2, row 10; `ORC-75JBATHUHG` |  |
| 1193.15 | peritectic: Liquid + SrAl4 = SrAl2 | SrAl4: Al 0.8, Sr 0.2; SrAl2: Al 0.666667, Sr 0.333333 | experimental | [1] Liang 2014; _cites Closset 1986_ [doi](https://doi.org/10.1007/bf02665326) | Table 5, p. 6, row 21; `ORC-QOZH3E2JAE` |  |
| 1193 | peritectic |  | experimental | [3] Zhong 2004 | p. 3; `ORC-GOVNTBMVDU.ad9360` | “The melting point of the Al4 Sr compound was given as 1298 K, the peritectic reactions of the Al2 Sr and ÔAlSrÕ (instead of the ÔAl2 Sr3 Õ in \[7\]) compounds at 1193 and 937 K, respectively.” |
| 951.15 | peritectic: SrAl2+L->Sr8Al7 | SrAl2: Al 0.666667, Sr 0.333333; Sr8Al7: Al 0.466667, Sr 0.533333 | experimental | [2] Wang 2003; _cites Vakhobov 1979_ | Table 1, p. 2, row 21; `ORC-A2VYZWBUJO` |  |
| 951.15 | peritectic: Liquid + SrAl2 = Sr8Al7 | SrAl2: Al 0.666667, Sr 0.333333; Sr8Al7: Al 0.466667, Sr 0.533333 | experimental | [1] Liang 2014; _cites Vakhobov 1979_ | Table 5, p. 6, row 27; `ORC-YH7FRULAZR` |  |
| 951 | peritectic |  | experimental | [3] Zhong 2004; _cites Vakhobov 1979_ | p. 3; `ORC-2UBFKGTGHM.87c19e` | “Particularly, their results agree well with the phase diagram drawn from the results of Bruzzone and Merlo \[7\]: the eutectic reaction on the Sr side was shown at about 77 at.% Sr and 833 K, the melting point of Al4 Sr coincides with the value of Bruzzone and Merlo \[7\]; and the peritectic reactions of formation of Al2 Sr and ÔAl2 Sr3 Õ were given as occurring at 1213 and 951 K, respectively.” |
| 941.15 | peritectic: Liquid + SrAl2 = Sr8Al7 | SrAl2: Al 0.666667, Sr 0.333333 (basis unresolved); Sr8Al7: Al 0.466667, Sr 0.533333 (basis unresolved) | model | [1] Liang 2014 | Table 5, p. 6, row 32; `ORC-C3VGO3QTCV` |  |
| 941.15 | peritectic: Liquid + SrAl2 = Sr8Al7 | SrAl2: Al 0.666667, Sr 0.333333 (basis unresolved); Sr8Al7: Al 0.466667, Sr 0.533333 (basis unresolved) | model | [1] Liang 2014; _cites Zhong 2004_ [doi](https://doi.org/10.1016/j.actamat.2004.02.022) | Table 5, p. 6, row 30; `ORC-PVTCGRJYMQ` |  |
| 939.15 | peritectic: Liquid + SrAl2 = Sr8Al7 | SrAl2: Al 0.666667, Sr 0.333333; Sr8Al7: Al 0.466667, Sr 0.533333 | experimental | [1] Liang 2014; _cites Conclusion_ | Table 5, p. 6, row 26; `ORC-7ZZZHLPNFW` |  |
| 939.15 | peritectic: SrAl2+L->Sr8Al7 | SrAl2: Al 0.666667, Sr 0.333333; L: Sr 0.72; Sr8Al7: Al 0.466667, Sr 0.533333 | model | [2] Wang 2003; _cites Du 2002_ | Table 1, p. 2, row 23; `ORC-IG6L4KOA7R` |  |
| 939.15 | peritectic: SrAl2+L->Sr8Al7 | SrAl2: Al 0.666667, Sr 0.333333; L: Sr 0.72; Sr8Al7: Al 0.466667, Sr 0.533333 | experimental | [2] Wang 2003; _cites Bruzzone 1975_ [doi](https://doi.org/10.1016/0022-5088%2875%2990212-x) | Table 1, p. 2, row 20; `ORC-RWMYOZU7R6` |  |
| 938.15 | peritectic: SrAl2+L->Sr8Al7 | SrAl2: Al 0.666667, Sr 0.333333; L: Sr 0.623; Sr8Al7: Al 0.466667, Sr 0.533333 | model | [2] Wang 2003 | Table 1, p. 2, row 24; `ORC-H6MVT65PSO` |  |
| 937.15 | peritectic: Liquid + SrAl2 = Sr8Al7 | SrAl2: Al 0.666667, Sr 0.333333 (basis unresolved); Sr8Al7: Al 0.466667, Sr 0.533333 (basis unresolved) | model | [1] Liang 2014; _cites Wang 2003_ [doi](https://doi.org/10.1016/s0925-8388%2803%2900046-x) | Table 5, p. 6, row 29; `ORC-JZ5D46XYDC` |  |
| 937.15 | peritectic: Liquid + SrAl2 = Sr8Al7 | SrAl2: Al 0.666667, Sr 0.333333; Sr8Al7: Al 0.466667, Sr 0.533333 | experimental | [1] Liang 2014; _cites Closset 1986_ [doi](https://doi.org/10.1007/bf02665326) | Table 5, p. 6, row 28; `ORC-SOPKZTZXL3` |  |
| 937.15 | peritectic: SrAl2+L->Sr8Al7 | SrAl2: Al 0.666667, Sr 0.333333; L: Sr 0.584; Sr8Al7: Al 0.466667, Sr 0.533333 | experimental | [2] Wang 2003; _cites Closset 1986_ [doi](https://doi.org/10.1007/bf02665326) | Table 1, p. 2, row 22; `ORC-T26ZHGQHRZ` |  |
| 937 | peritectic |  | experimental | [3] Zhong 2004 | p. 3; `ORC-GOVNTBMVDU.55f9ee` | “The melting point of the Al4 Sr compound was given as 1298 K, the peritectic reactions of the Al2 Sr and ÔAlSrÕ (instead of the ÔAl2 Sr3 Õ in \[7\]) compounds at 1193 and 937 K, respectively.” |
| 936.15 | peritectic: Liquid + SrAl2 = Sr8Al7 | SrAl2: Al 0.666667, Sr 0.333333 (basis unresolved); Sr8Al7: Al 0.466667, Sr 0.533333 (basis unresolved) | model | [1] Liang 2014; _cites Zhong 2004_ [doi](https://doi.org/10.1016/j.actamat.2004.02.022) | Table 5, p. 6, row 31; `ORC-JLBLGKTW6J` |  |
| 928.75 | eutectic |  | experimental | [1] Liang 2014 | p. 3; `ORC-4HTGI45Z64` | “Preference is given to the data at slow heating rate and the value of 655.6 °C is determined for the (Al)-SrAl4 eutectic temperature.” |
| 928.75 | eutectic: Liquid = (Al) + SrAl4 | SrAl4: Al 0.8, Sr 0.2 | experimental | [1] Liang 2014 | Table 5, p. 6, row 9; `ORC-LL6X7FXMQN` |  |
| 928.55 | eutectic: Liquid = (Al) + SrAl4 | SrAl4: Al 0.8, Sr 0.2 (basis unresolved) | model | [1] Liang 2014 | Table 5, p. 6, row 10; `ORC-6PZ33CORZT` |  |
| 928.05 | eutectic: Liquid = (Al) + SrAl4 | SrAl4: Al 0.8, Sr 0.2 (basis unresolved) | model | [1] Liang 2014; _cites Zhong 2004_ [doi](https://doi.org/10.1016/j.actamat.2004.02.022) | Table 5, p. 6, row 8; `ORC-IG7TDBFJNE` |  |
| 927.15 | eutectic: L->(Al)+SrAl4 | L: Sr 0.01; SrAl4: Al 0.8, Sr 0.2 | model | [2] Wang 2003; _cites Du 2002_ | Table 1, p. 2, row 18; `ORC-MOM26ONOAK` |  |
| 927.15 | eutectic: Liquid = (Al) + SrAl4 | SrAl4: Al 0.8, Sr 0.2 (basis unresolved) | experimental | [1] Liang 2014; _cites Sato 1985_ | Table 5, p. 6, row 4; `ORC-STG37C24ZR` |  |
| 927.15 | eutectic: Liquid = (Al) + SrAl4 | SrAl4: Al 0.8, Sr 0.2 (basis unresolved) | experimental | [1] Liang 2014; _cites Closset 1986_ [doi](https://doi.org/10.1007/bf02665326) | Table 5, p. 6, row 5; `ORC-XRTUZGDFBU` |  |
| 926.15 | eutectic: Liquid = (Al) + SrAl4 | SrAl4: Al 0.8, Sr 0.2 (basis unresolved) | experimental | [1] Liang 2014; _cites Hanna 1983_ | Table 5, p. 6, row 3; `ORC-BLHDBR7U33` |  |
| 926.15 | eutectic: L->(Al)+SrAl4 | L: Sr 0.013; SrAl4: Al 0.8, Sr 0.2 | experimental | [2] Wang 2003; _cites Hanna 1983_ | Table 1, p. 2, row 15; `ORC-LJU2VSIJE6` |  |
| 925.15 | eutectic: L->(Al)+SrAl4 | L: Sr 0.0116; SrAl4: Al 0.8, Sr 0.2 | model | [2] Wang 2003 | Table 1, p. 2, row 19; `ORC-Z4PW27INDV` |  |
| 925.15 | eutectic: Liquid = (Al) + SrAl4 | SrAl4: Al 0.8, Sr 0.2 (basis unresolved) | model | [1] Liang 2014; _cites Wang 2003_ [doi](https://doi.org/10.1016/s0925-8388%2803%2900046-x) | Table 5, p. 6, row 6; `ORC-ZD7MEILJZA` |  |
| 925.05 | eutectic: Liquid = (Al) + SrAl4 | SrAl4: Al 0.8, Sr 0.2 (basis unresolved) | model | [1] Liang 2014; _cites Zhong 2004_ [doi](https://doi.org/10.1016/j.actamat.2004.02.022) | Table 5, p. 6, row 7; `ORC-HGF3EWO752` |  |
| 908.15 | eutectic: L->(Al)+SrAl4 | L: Sr 0.032; SrAl4: Al 0.8, Sr 0.2 | experimental | [2] Wang 2003; _cites Vakhobov 1979_ | Table 1, p. 2, row 14; `ORC-EWI7FZPOVE` |  |
| 908.15 | eutectic: Liquid = (Al) + SrAl4 | SrAl4: Al 0.8, Sr 0.2 (basis unresolved) | experimental | [1] Liang 2014; _cites Vakhobov 1979_ | Table 5, p. 6, row 2; `ORC-YFSGXUBETT` |  |
| 903.15 | eutectic: Liquid = (Al) + SrAl4 | SrAl4: Al 0.8, Sr 0.2 (basis unresolved) | experimental | [1] Liang 2014; _cites Vakhobov 1975_ | Table 5, p. 6, row 1; `ORC-2ECWAFLKRI` |  |
| 903.15 | eutectic: L->(Al)+SrAl4 | L: Sr 0.032; SrAl4: Al 0.8, Sr 0.2 | experimental | [2] Wang 2003; _cites Burylev 1974_ | Table 1, p. 2, row 13; `ORC-IUTSPM6LLV` |  |
| 863.15 | eutectic: L->Sr8Al7+(βSr) | L: Sr 0.8175; Sr8Al7: Al 0.466667, Sr 0.533333 | experimental | [2] Wang 2003; _cites Bruzzone 1975_ [doi](https://doi.org/10.1016/0022-5088%2875%2990212-x) | Table 1, p. 2, row 26; `ORC-DXX6KRJSIN` |  |
| 863.15 | eutectic: L->Sr8Al7+(βSr) | L: Sr 0.818; Sr8Al7: Al 0.466667, Sr 0.533333 | model | [2] Wang 2003; _cites Du 2002_ | Table 1, p. 2, row 29; `ORC-IDEHMBFOLB` |  |
| 853.15 | eutectic: L->Sr8Al7+(βSr) | L: Sr 0.735; Sr8Al7: Al 0.466667, Sr 0.533333 | experimental | [2] Wang 2003; _cites Closset 1986_ [doi](https://doi.org/10.1007/bf02665326) | Table 1, p. 2, row 28; `ORC-PEYUEC76UZ` |  |
| 853.15 | eutectic: L->Sr8Al7+(βSr) | L: Sr 0.77; Sr8Al7: Al 0.466667, Sr 0.533333 | experimental | [2] Wang 2003; _cites Vakhobov 1979_ | Table 1, p. 2, row 27; `ORC-XJHIQFPLSG` |  |
| 852.15 | eutectic: L->Sr8Al7+(βSr) | L: Sr 0.736; Sr8Al7: Al 0.466667, Sr 0.533333 | model | [2] Wang 2003 | Table 1, p. 2, row 30; `ORC-XC45CMBRQG` |  |
| 833.15 | eutectic: L->Sr8Al7+(βSr) | L: Sr 0.7; Sr8Al7: Al 0.466667, Sr 0.533333 | experimental | [2] Wang 2003; _cites Burylev 1974_ | Table 1, p. 2, row 25; `ORC-5Y5JUNUS5M` |  |

## 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](https://data.orchid-project.org/literature/dft_parity.json).

Table: Enthalpies of formation, Al–Sr system (43)

| Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote |
|---|---|---:|---:|---|---:|---:|---|---|---|
| "SQS-16" |  | -12.3 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 30; `ORC-6COIHL4TJJ.e33525` |  |
| "SQS-16" |  | -11.6 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 3; `ORC-RCDACG7ZVZ.0f3b83` |  |
| Al10V-type |  | 8.4 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 24; `ORC-KSB2SUN753.095656` |  |
| Al13Ba7-type |  | -27.8 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 37; `ORC-V2X4HHW66P.2b4753` |  |
| Al13Ba7-type |  | -27.3 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 38; `ORC-GZWB6RPPIB.9b0285` |  |
| Al14Ca13-type |  | -22.4 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 19; `ORC-EOMV7HCPYP.5f6414` |  |
| Al2Sr C14 |  | -28.2 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 7; `ORC-X7UDDPRXTK.90a116` |  |
| Al2Sr C15 |  | -30.3 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 36; `ORC-6DZ4YRCL2I.d02e4f` |  |
| Al2Sr C15 |  | -27.2 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 17; `ORC-O2IODHVZER.bb8855` |  |
| Al2Sr C16 |  | 0.5 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 11; `ORC-IHQ3ILNKFZ.1a04f2` |  |
| Al2Sr C32 |  | -23 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 9; `ORC-CECNGUBOXZ.0a7dfb` |  |
| Al2Sr C36 |  | -29.8 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 8; `ORC-4S35WXHLET.5a7b4d` |  |
| Al2Sr CaF2-type |  | 55.4 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 14; `ORC-SUJPEYUGWH.641812` |  |
| Al2Sr CaIn2-type |  | -26 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 10; `ORC-O6GGHPQNEI.5f7123` |  |
| Al2Sr CeCu2-type |  | -29.7 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 31; `ORC-HUIVJDU35E.28bb13` |  |
| Al2Sr CeCu2-type |  | -29 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 34; `ORC-R7VVSCK6M5.da105b` |  |
| Al2Sr CeCu2-type |  | -28.8 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 35; `ORC-FKLHNK44UV.0c8390` |  |
| Al2Sr CeCu2-type |  | -27.9 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 33; `ORC-UGMDR7N475.30e293` |  |
| Al2Sr CeCu2-type |  | -27.4 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 32; `ORC-5LR2J676UV.a8cc62` |  |
| Al2Sr MoPt2-type |  | -8.2 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 13; `ORC-JFLCHIBCLM.f5a3db` |  |
| Al3Sr L12 |  | -5.5 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 4; `ORC-SOET5LN2C7.54c9f9` |  |
| Al3Sr “SQS-16” |  | -12.3 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 30; `ORC-6COIHL4TJJ.983189` |  |
| Al3Sr “SQS-16” |  | -11.6 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 3; `ORC-RCDACG7ZVZ.342f18` |  |
| Al3Sr8 Ca8In3-type |  | -10.6 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 46; `ORC-7VRYI6VETF.f046ca` |  |
| Al3Sr8 Ca8In3-type |  | -10.1 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 23; `ORC-QOP6TQLYSY.c98d4a` |  |
| Al4Ba-type |  | -26.2 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 29; `ORC-I2L2NQ7XFN.6c5bf2` |  |
| Al4Ba-type |  | -25.6 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 28; `ORC-UJDW4F542Q.8b95a8` |  |
| Al4Ba-type |  | -24.2 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 25; `ORC-4QLINLIEEG.9567af` |  |
| Al4Ba-type |  | -23.7 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 26; `ORC-A4HAISTUSA.d1b8b2` |  |
| Al4Ba-type |  | -22.8 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 27; `ORC-GVNQVZSEKK.446f78` |  |
| Al5Ba3-type |  | -27.5 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 41; `ORC-424RFS6NQE.405446` |  |
| Al5Ba3-type |  | -27.2 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 17; `ORC-O2IODHVZER.b8f612` |  |
| Al5Ba4-type |  | -26.7 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 42; `ORC-QLTVXKJ2WC.ac71d5` |  |
| Al7Sr8 |  | -21.9 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 44; `ORC-N57J72G3CN.e7469b` |  |
| Al7Sr8 |  | -21.4 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 45; `ORC-QFTGMTKHEN.a1cfbb` |  |
| Al7Sr8 |  | -18.9 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 43; `ORC-O2YD2RYYWK.052d79` |  |
| Al9Sr5 |  | -29.4 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 39; `ORC-RKTP2OSUYU.a9b3dd` |  |
| Al9Sr5 |  | -27.7 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 40; `ORC-D6CT4TEMOD.f4884b` |  |
| AlSr B2 |  | -12.7 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 21; `ORC-BPWQH6BEGW.8cc7ee` |  |
| AlSr Bf |  | -17.3 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 20; `ORC-2XA25I4GQQ.cb1ebf` |  |
| Ni3Sn-type |  | -18.4 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 2; `ORC-RLKMHJCHUE.20dbdc` |  |
| Si2Sr-type |  | -9 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 12; `ORC-F6FALIBT4P.bfdb34` |  |
| ‘‘SQS-16’’ |  | -11.6 kJ/mol-atom | 0 | DFT |  |  | [3] Zhong 2004 | Table 3, p. 6, row 3; `ORC-RCDACG7ZVZ.7913a6` |  |

## Other properties

### Phase transition (3)

Table: Phase transition, Al–Sr system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase transition | 928.75 K | 928.75 | eutectic: (Al)-SrAl4 eutectic; _alloy: Al 0, Sr 1_ | experimental | [1] Liang 2014 | Table 2, p. 4, row 6; `ORC-A5WPLXK25V` |  |
| Phase transition | 929.05 K | 929.05 | eutectic: (Al)-SrAl4 eutectic; _alloy: Al 0, Sr 1_ | experimental | [1] Liang 2014 | Table 2, p. 4, row 2; `ORC-3IMKZVSEU4` |  |
| Phase transition | 1298 K | 1298 | Al4Sr | experimental | [3] Zhong 2004 | p. 3; `ORC-GOVNTBMVDU.94f3db` | “The melting point of the Al4 Sr compound was given as 1298 K, the peritectic reactions of the Al2 Sr and ÔAlSrÕ (instead of the ÔAl2 Sr3 Õ in \[7\]) compounds at 1193 and 937 K, respectively.” |

### Activity / EMF / Gibbs energy (1)

Table: Activity / EMF / Gibbs energy, Al–Sr system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Activity; _printed: a(Sr)_ | 0.002 unspecified | 1300 |  | experimental | [3] Zhong 2004; _cites Vakhobov 1974_ | p. 3; `ORC-RMUMS4PWNZ` | “The values of the activities of Sr at 1300 K were given as 0.002 at 20 at.% Sr and 0.03 at 33.3 or 50 at.% Sr separately by Vakhobov et al. \[6\] and Burylev et al. \[5\].” |

## Sources

Reporting papers the values were read from (a value cited from another work names that work in its row).

1. Song-Mao Liang, Michael Engstler, Veronika Groten, Jenifer Barrirero, Frank Mücklich, Andreas Bührig-Polaczek et al., Key experiments and thermodynamic revision of the binary Al–Sr system, Journal of Alloys and Compounds 610, 443-450 (2014). [doi:10.1016/j.jallcom.2014.05.018](https://doi.org/10.1016/j.jallcom.2014.05.018)
2. Chong Wang, Zhanpeng Jin, Yong Du, Thermodynamic modeling of the Al–Sr system, Journal of Alloys and Compounds 358, 288-293 (2003). [doi:10.1016/s0925-8388(03)00046-x](https://doi.org/10.1016/s0925-8388%2803%2900046-x)
3. Yu Zhong, C. Wolverton, Y. Austin Chang, Zi-Kui Liu, A combined CALPHAD/first-principles remodeling of the thermodynamics of Al–Sr: unsuspected ground state energies by “rounding up the (un)usual suspects”, Acta Materialia 52, 2739-2754 (2004). [doi:10.1016/j.actamat.2004.02.022](https://doi.org/10.1016/j.actamat.2004.02.022)

## Please cite

- R. Arróyave, J. Saal, D. Shin, ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature (version 2026.10; Version 1, machine-extracted), Zenodo (2026). https://doi.org/10.5281/zenodo.23735569
- R. Arróyave, J. Saal, D. Shin, ORCHID-Diagrams: calculated binary phase diagrams (version 2026.10), Zenodo (2026). https://doi.org/10.5281/zenodo.23735859
- R. Arróyave, J. Saal, D. Shin, ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD) (version 2026.10), Zenodo (2026). https://doi.org/10.5281/zenodo.23735891
- R. Arróyave, J. Saal, D. Shin, ORCHID data: umbrella record of the ORCHID datasets (version 2026.10; Version 1, machine-extracted), Zenodo (2026). https://doi.org/10.5281/zenodo.23736065

Also cite the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work); B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, https://doi.org/10.1016/j.calphad.2025.102833 (CC BY 4.0), and the original assessment named in each file; A. Jain et al., The Materials Project: A materials genome approach to accelerating materials innovation, APL Materials 1 (2013) 011002, https://doi.org/10.1063/1.4812323 (CC BY 4.0); J. E. Saal et al., JOM 65 (2013) 1501, https://doi.org/10.1007/s11837-013-0755-4 and S. Kirklin et al., npj Comput. Mater. 1 (2015) 15010, https://doi.org/10.1038/npjcompumats.2015.10 (CC BY 4.0).

Version 1, machine-extracted: values were read by language-model readers constrained to quote their source and checked automatically, and the release was then audited on the printed pages by adversarial audits, an independent second review of fit-facing records and a preliminary human review of a frozen sample. Flags such as accepted and ESPEI-ready record screening results, not certification; known issues are listed in the release notes.

```bibtex
@misc{orchid_literature_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735569},
  url       = {https://doi.org/10.5281/zenodo.23735569},
  note      = {Version 1, machine-extracted}
}

@misc{orchid_phase_diagrams_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Diagrams: calculated binary phase diagrams}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735859},
  url       = {https://doi.org/10.5281/zenodo.23735859}
}

@misc{orchid_hulls_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD)}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735891},
  url       = {https://doi.org/10.5281/zenodo.23735891}
}

@misc{orchid_data_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID data: umbrella record of the ORCHID datasets}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23736065},
  url       = {https://doi.org/10.5281/zenodo.23736065},
  note      = {Version 1, machine-extracted}
}
```

---

Derived data CC BY 4.0 ([licence](https://creativecommons.org/licenses/by/4.0/)): cite ORCHID ([CITATION.cff](https://data.orchid-project.org/CITATION.cff)) and the original sources. Quotes are short excerpts kept so that each value can be checked; they remain under the publishers' copyright and are not relicensed. Source papers, page images and full text are not redistributed. Field reference: [SCHEMA.md](https://data.orchid-project.org/literature/SCHEMA.md). Machine-readable guide: [llms.txt](https://data.orchid-project.org/llms.txt). Found an error? The report link of a value (Markdown: its id, ORC-..., in the Location column) opens a pre-filled GitHub issue, https://github.com/orchid-calphad/orchid-data/issues/new?template=report-value-error.yml&record_id=\<id>, carrying only the record id, source and value; [how to contribute](https://orchid-project.org/contribute/).