# Al–Sm system

> Al–Sm system: 81 accepted literature values (invariant reaction 50, crystal structure 24, phase equilibrium 5, phase transition 2) and 3 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

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

81 accepted literature values from 2 paper(s) (experimental 31, model 26, unspecified 24); 3 calculated phase diagram(s). 16 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-SM.json) · [CSV](https://data.orchid-project.org/systems/AL-SM.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#AL-SM) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#AL-SM/AlSm-08Jia.json) · [phases (13)](https://data.orchid-project.org/phases/pages/AL-SM.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/AL-SM.html) · [Markdown](https://data.orchid-project.org/systems/AL-SM.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 31 |
| model | 26 |
| unspecified | 24 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 50 |
| phase transition | 2 |
| phase equilibrium | 5 |
| crystal structure | 24 |

## 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 |
|---|---|---|---|
| AlSm-08Jia.tdb | B.R. Jia, L.B. Liu, D.Q. Yi, Z.P. Jin, J.F. Nie, J. Alloys Compd., 459, 267-73(2008). [doi:10.1016/j.jallcom.2007.05.035](https://doi.org/10.1016/j.jallcom.2007.05.035) | `b393d63733d46908256d716b9897ded94ab75c537fce89e4a064818d18a30896` | [viewer](https://orchid-project.org/phase-diagrams/#AL-SM/AlSm-08Jia.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/AlSm-08Jia.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/AlSm-08Jia.json) |
| AlSm-08Zho.tdb | S.H. Zhou, R.E. Napolitano, Metall. Mater. Trans. A, 39A, 502-12(2008). [doi:10.1007/s11661-007-9445-6](https://doi.org/10.1007/s11661-007-9445-6) | `2da381cdcf96b97e79fd003424493b1f196c5b0685c634bb2845b3dcab60eeda` | [viewer](https://orchid-project.org/phase-diagrams/#AL-SM/AlSm-08Zho.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/AlSm-08Zho.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/AlSm-08Zho.json) |
| AlSm-98Sac.tdb | A. Saccone, G. Cacciamani, D. Maccio, G. Borzone, R. Ferro, Intermetallics, 6, 201-15(1998). [doi:10.1016/S0966-9795(97)00066-6](https://doi.org/10.1016/S0966-9795%2897%2900066-6) | `dbfe39f86fc8f00a9b3591ab3c337eb19cf22af91b24fe0d7530703f5e8d3b11` | [viewer](https://orchid-project.org/phase-diagrams/#AL-SM/AlSm-98Sac.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/AlSm-98Sac.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/AlSm-98Sac.json) |

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

| TDB file | T (K) | Phases at the invariant |
|---|---:|---|
| AlSm-08Jia.tdb | 1651.18 | AL11SM3_D13 (x(Sm) 0.21429) + LIQUID (x(Sm) 0.22344) + AL2SM_C15 (x(Sm) 0.33333) |
| AlSm-08Jia.tdb | 1651.18 | AL11SM3_D13 (x(Sm) 0.21429) + LIQUID (x(Sm) 0.22354) + AL2SM_C15 (x(Sm) 0.33333) |
| AlSm-08Jia.tdb | 1651.18 | AL11SM3_D13 (x(Sm) 0.21429) + LIQUID (x(Sm) 0.22366) + AL2SM_C15 (x(Sm) 0.33333) |
| AlSm-08Jia.tdb | 1395.72 | AL11SM3_D13 (x(Sm) 0.21429) + AL3SM_D019 (x(Sm) 0.25) + AL2SM_C15 (x(Sm) 0.33333) |
| AlSm-08Jia.tdb | 1346.78 | LIQUID (x(Sm) 0.11469) + AL11SM3_LT (x(Sm) 0.21429) + AL11SM3_D13 (x(Sm) 0.21429) |
| AlSm-08Jia.tdb | 1346.78 | AL11SM3_LT (x(Sm) 0.21429) + AL11SM3_D13 (x(Sm) 0.21429) + AL3SM_D019 (x(Sm) 0.25) |
| AlSm-08Jia.tdb | 1236.44 | AL2SM_C15 (x(Sm) 0.33333) + ALSM (x(Sm) 0.5) + LIQUID (x(Sm) 0.61313) |
| AlSm-08Jia.tdb | 1236.44 | AL2SM_C15 (x(Sm) 0.33333) + ALSM (x(Sm) 0.5) + LIQUID (x(Sm) 0.6131) |
| AlSm-08Jia.tdb | 1187.99 | BCC_A2 (x(Sm) 0.99817) + RHOMB_C19 (x(Sm) 0.99872) + HCP_A3 (x(Sm) 0.99998) |
| AlSm-08Jia.tdb | 1187.99 | BCC_A2 (x(Sm) 0.99817) + RHOMB_C19 (x(Sm) 0.99872) + HCP_A3 (x(Sm) 0.99998) |
| AlSm-08Jia.tdb | 1132.52 | ALSM (x(Sm) 0.5) + ALSM2_C37 (x(Sm) 0.66667) + LIQUID (x(Sm) 0.66763) |
| AlSm-08Jia.tdb | 1132.52 | ALSM (x(Sm) 0.5) + ALSM2_C37 (x(Sm) 0.66667) + LIQUID (x(Sm) 0.66755) |
| AlSm-08Jia.tdb | 1132.52 | ALSM (x(Sm) 0.5) + ALSM2_C37 (x(Sm) 0.66667) + LIQUID (x(Sm) 0.66764) |
| AlSm-08Jia.tdb | 1045.52 | ALSM2_C37 (x(Sm) 0.66667) + LIQUID (x(Sm) 0.7964) + BCC_A2 (x(Sm) 0.89426) |
| AlSm-08Jia.tdb | 1045.52 | ALSM2_C37 (x(Sm) 0.66667) + LIQUID (x(Sm) 0.79649) + BCC_A2 (x(Sm) 0.89437) |
| AlSm-08Jia.tdb | 983.51 | ALSM2_C37 (x(Sm) 0.66667) + BCC_A2 (x(Sm) 0.90303) + RHOMB_C19 (x(Sm) 0.96307) |
| AlSm-08Jia.tdb | 983.51 | ALSM2_C37 (x(Sm) 0.66667) + BCC_A2 (x(Sm) 0.90302) + RHOMB_C19 (x(Sm) 0.96307) |
| AlSm-08Jia.tdb | 893.81 | FCC_A1 (x(Sm) 0) + LIQUID (x(Sm) 0.03264) + AL11SM3_LT (x(Sm) 0.21429) |
| AlSm-08Jia.tdb | 536.68 | FCC_A1 (x(Sm) 0) + AL11SM3_LT (x(Sm) 0.21429) + AL3SM_D019 (x(Sm) 0.25) |
| AlSm-08Zho.tdb | 1585.25 | AL4SM_D13 (x(Sm) 0.2) + LIQUID (x(Sm) 0.22797) + AL2SM_C15 (x(Sm) 0.33333) |
| AlSm-08Zho.tdb | 1408.51 | AL4SM_D13 (x(Sm) 0.2) + AL3SM_D019 (x(Sm) 0.25) + AL2SM_C15 (x(Sm) 0.33333) |
| AlSm-08Zho.tdb | 1333.22 | LIQUID (x(Sm) 0.14066) + AL4SM_D13 (x(Sm) 0.2) + AL3SM_D019 (x(Sm) 0.25) |
| AlSm-08Zho.tdb | 1233 | AL2SM_C15 (x(Sm) 0.33333) + ALSM (x(Sm) 0.5) + LIQUID (x(Sm) 0.58575) |
| AlSm-08Zho.tdb | 1134.93 | ALSM (x(Sm) 0.5) + ALSM2_C37 (x(Sm) 0.66667) + LIQUID (x(Sm) 0.68551) |
| AlSm-08Zho.tdb | 1059.06 | ALSM2_C37 (x(Sm) 0.66667) + LIQUID (x(Sm) 0.83373) + BCC_A2 (x(Sm) 0.94028) |
| AlSm-08Zho.tdb | 1007.31 | BCC_A2 (x(Sm) 0.96192) + RHOMB_C19 (x(Sm) 0.99998) + HCP_A3 (x(Sm) 0.99999) |
| AlSm-08Zho.tdb | 1007.31 | BCC_A2 (x(Sm) 0.96195) + RHOMB_C19 (x(Sm) 0.99998) + HCP_A3 (x(Sm) 0.99999) |
| AlSm-08Zho.tdb | 974.41 | ALSM2_C37 (x(Sm) 0.66667) + BCC_A2 (x(Sm) 0.95637) + RHOMB_C19 (x(Sm) 0.99998) |
| AlSm-08Zho.tdb | 974.41 | ALSM2_C37 (x(Sm) 0.66667) + BCC_A2 (x(Sm) 0.95637) + RHOMB_C19 (x(Sm) 0.99998) |
| AlSm-08Zho.tdb | 974.41 | ALSM2_C37 (x(Sm) 0.66667) + BCC_A2 (x(Sm) 0.95636) + RHOMB_C19 (x(Sm) 0.99998) |
| AlSm-08Zho.tdb | 919.53 | FCC_A1 (x(Sm) 0) + LIQUID (x(Sm) 0.01874) + AL3SM_D019 (x(Sm) 0.25) |
| AlSm-98Sac.tdb | 1643.45 | AL11SM3_D13 (x(Sm) 0.21429) + LIQUID (x(Sm) 0.22235) + AL2SM_C15 (x(Sm) 0.33333) |
| AlSm-98Sac.tdb | 1643.45 | AL11SM3_D13 (x(Sm) 0.21429) + LIQUID (x(Sm) 0.22237) + AL2SM_C15 (x(Sm) 0.33333) |
| AlSm-98Sac.tdb | 1643.45 | AL11SM3_D13 (x(Sm) 0.21429) + LIQUID (x(Sm) 0.22239) + AL2SM_C15 (x(Sm) 0.33333) |
| AlSm-98Sac.tdb | 1404.46 | AL11SM3_D13 (x(Sm) 0.21429) + AL3SM_D019 (x(Sm) 0.25) + AL2SM_C15 (x(Sm) 0.33333) |
| AlSm-98Sac.tdb | 1345 | AL3SM_D019 (x(Sm) 0.25) + LIQUID (x(Sm) 1) + BCC_A2 (x(Sm) 1) |
| AlSm-98Sac.tdb | 1337.85 | AL11SM3_D13 (x(Sm) 0.21429) + AL11SM3_LT (x(Sm) 0.21429) + AL3SM_D019 (x(Sm) 0.25) |
| AlSm-98Sac.tdb | 1337.85 | LIQUID (x(Sm) 0.11476) + AL11SM3_LT (x(Sm) 0.21429) + AL11SM3_D13 (x(Sm) 0.21429) |
| AlSm-98Sac.tdb | 1215.45 | AL2SM_C15 (x(Sm) 0.33333) + ALSM (x(Sm) 0.5) + LIQUID (x(Sm) 0.61667) |
| AlSm-98Sac.tdb | 1215.45 | AL2SM_C15 (x(Sm) 0.33333) + ALSM (x(Sm) 0.5) + LIQUID (x(Sm) 0.61665) |
| AlSm-98Sac.tdb | 1187.99 | BCC_A2 (x(Sm) 0.99817) + RHOMB_C19 (x(Sm) 0.99872) + HCP_A3 (x(Sm) 0.99998) |
| AlSm-98Sac.tdb | 1187.99 | BCC_A2 (x(Sm) 0.99817) + RHOMB_C19 (x(Sm) 0.99872) + HCP_A3 (x(Sm) 0.99998) |
| AlSm-98Sac.tdb | 1121.37 | ALSM (x(Sm) 0.5) + ALSM2_C37 (x(Sm) 0.66667) + LIQUID (x(Sm) 0.67043) |
| AlSm-98Sac.tdb | 1121.37 | ALSM (x(Sm) 0.5) + ALSM2_C37 (x(Sm) 0.66667) + LIQUID (x(Sm) 0.67034) |
| AlSm-98Sac.tdb | 1121.37 | ALSM (x(Sm) 0.5) + ALSM2_C37 (x(Sm) 0.66667) + LIQUID (x(Sm) 0.67044) |
| AlSm-98Sac.tdb | 1038.9 | ALSM2_C37 (x(Sm) 0.66667) + LIQUID (x(Sm) 0.79303) + BCC_A2 (x(Sm) 0.89027) |
| AlSm-98Sac.tdb | 1038.9 | ALSM2_C37 (x(Sm) 0.66667) + LIQUID (x(Sm) 0.79318) + BCC_A2 (x(Sm) 0.89044) |
| AlSm-98Sac.tdb | 973.36 | ALSM2_C37 (x(Sm) 0.66667) + BCC_A2 (x(Sm) 0.90015) + RHOMB_C19 (x(Sm) 0.96245) |
| AlSm-98Sac.tdb | 973.36 | ALSM2_C37 (x(Sm) 0.66667) + BCC_A2 (x(Sm) 0.90014) + RHOMB_C19 (x(Sm) 0.96244) |
| AlSm-98Sac.tdb | 897.79 | FCC_A1 (x(Sm) 0) + LIQUID (x(Sm) 0.03039) + AL11SM3_LT (x(Sm) 0.21429) |
| AlSm-98Sac.tdb | 897.78 | FCC_A1 (x(Sm) 0) + LIQUID (x(Sm) 0.03022) + AL11SM3_LT (x(Sm) 0.21429) |

Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/AL/AL-SM.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/AL/AL-SM.json) · [CALPHAD hull AlSm-08Zho](https://data.orchid-project.org/hulls/calphad-sgte/AL/AL-SM--AlSm-08Zho.json) · [CALPHAD hull AlSm-98Sac](https://data.orchid-project.org/hulls/calphad-sgte/AL/AL-SM--AlSm-98Sac.json)

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Al–Sm system (50)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 1773 | congruent melting: Liq -> δ | Liq: Sm 0.333; δ: Sm 0.333 | experimental | [1] Zhou 2008; _cites Casteels 1967_ [doi](https://doi.org/10.1016/0022-5088%2867%2990116-6) | Table I, p. 2, row 4; `ORC-LPL2XNB5VT` |  |
| 1757.6 | congruent melting: Liq -> δ | Liq: Sm 0.333; δ: Sm 0.333 | model | [1] Zhou 2008 | Table I, p. 2, row 1; `ORC-ZPCKI43JHW` |  |
| 1753 | congruent melting: Liq -> δ | Liq: Sm 0.333; δ: Sm 0.333 | experimental | [1] Zhou 2008; _cites Saccone 1998_ [doi](https://doi.org/10.1016/s0966-9795%2897%2900066-6) | Table I, p. 2, row 3; `ORC-2YTKVHEBIR` |  |
| 1747.1 | congruent melting: Liq -> δ | Liq: Sm 0.333; δ: Sm 0.333 | model | [1] Zhou 2008; _cites Saccone 1998_ [doi](https://doi.org/10.1016/s0966-9795%2897%2900066-6) | Table I, p. 2, row 2; `ORC-PUK2SHFOJX` |  |
| 1723 | congruent melting: Liq -> β | Liq: Sm 0.205; β: Sm 0.205 | experimental | [1] Zhou 2008; _cites Casteels 1967_ [doi](https://doi.org/10.1016/0022-5088%2867%2990116-6) | Table I, p. 2, row 8; `ORC-XPAENVCU2N` |  |
| 1655 | congruent melting: Liq -> β | Liq: Sm 0.2; β: Sm 0.2 | model | [1] Zhou 2008 | Table I, p. 2, row 5; `ORC-7MP6KVGVII` |  |
| 1653 | congruent melting: Liq -> β | Liq: Sm 0.2; β: Sm 0.2 | experimental | [1] Zhou 2008; _cites Saccone 1998_ [doi](https://doi.org/10.1016/s0966-9795%2897%2900066-6) | Table I, p. 2, row 7; `ORC-YWD5FORENX` |  |
| 1644.9 | congruent melting: Liq -> β | Liq: Sm 0.214; β: Sm 0.214 | model | [1] Zhou 2008; _cites Saccone 1998_ [doi](https://doi.org/10.1016/s0966-9795%2897%2900066-6) | Table I, p. 2, row 6; `ORC-TIA6746KVM` |  |
| 1643.5 | eutectic: Liq -> β + σ | Liq: Sm 0.222; β: Sm 0.214; σ: Sm 0.333 | model | [1] Zhou 2008; _cites Saccone 1998_ [doi](https://doi.org/10.1016/s0966-9795%2897%2900066-6) | Table I, p. 2, row 10; `ORC-3U6JELUBUR` |  |
| 1613 | eutectic: Liq -> β + σ | Liq: Sm 0.249; β: Sm 0.214; σ: Sm 0.333 | experimental | [1] Zhou 2008; _cites Saccone 1998_ [doi](https://doi.org/10.1016/s0966-9795%2897%2900066-6) | Table I, p. 2, row 11; `ORC-2YWFLJLWB4` |  |
| 1585.1 | eutectic: Liq -> β + σ | Liq: Sm 0.228; β: Sm 0.2; σ: Sm 0.333 | model | [1] Zhou 2008 | Table I, p. 2, row 9; `ORC-JEZKVM63PW` |  |
| 1501 | eutectic: Liq -> β + σ | β: Sm 0.205; σ: Sm 0.333 | experimental | [1] Zhou 2008; _cites Casteels 1967_ [doi](https://doi.org/10.1016/0022-5088%2867%2990116-6) | Table I, p. 2, row 13; `ORC-3CJDKA67YF` |  |
| 1473 | eutectic: Liq -> β + σ | β: Sm 0.2; σ: Sm 0.333 | experimental | [1] Zhou 2008; _cites Buschow 1965_ | Table I, p. 2, row 12; `ORC-C6RGJSTBSO` |  |
| 1408.5 | β + σ -> δ | β: Sm 0.2; σ: Sm 0.333; δ: Sm 0.25 | model | [1] Zhou 2008 | Table I, p. 2, row 14; `ORC-Y3WP6HOY74` |  |
| 1407 | β + σ -> δ | σ: Al 0.666667, Sm 0.333333 | experimental | [1] Zhou 2008; _cites Casteels 1967_ [doi](https://doi.org/10.1016/0022-5088%2867%2990116-6) | Table I, p. 2, row 18; `ORC-LXKJF2SWSK` |  |
| 1404.3 | β + σ -> δ | β: Sm 0.214; σ: Sm 0.333; δ: Sm 0.25 | model | [1] Zhou 2008; _cites Saccone 1998_ [doi](https://doi.org/10.1016/s0966-9795%2897%2900066-6) | Table I, p. 2, row 15; `ORC-AAJJ5JOAWP` |  |
| 1403 | β + σ -> δ | β: Sm 0.214; σ: Sm 0.333; δ: Sm 0.25 | experimental | [1] Zhou 2008; _cites Saccone 1998_ [doi](https://doi.org/10.1016/s0966-9795%2897%2900066-6) | Table I, p. 2, row 16; `ORC-4HHN7YU2FG` |  |
| 1378 | β + σ -> δ | β: Sm 0.2; σ: Sm 0.333; δ: Sm 0.25 | experimental | [1] Zhou 2008; _cites Buschow 1965_ | Table I, p. 2, row 17; `ORC-NTGBYFL253` |  |
| 1361.5 | β + σ -> α | σ: Al 0.666667, Sm 0.333333; α: Al 0.785714, Sm 0.214286 | model | [1] Zhou 2008 | Table I, p. 2, row 43; `ORC-JMGP72S7DV` |  |
| 1351 | β -> liq + δ | β: Sm 0.2 | experimental | [1] Zhou 2008; _cites Casteels 1967_ [doi](https://doi.org/10.1016/0022-5088%2867%2990116-6) | Table I, p. 2, row 23; `ORC-WWRALPIGUY` |  |
| 1343 | β -> liq + δ | β: Sm 0.2; liq: Sm 0.13; δ: Sm 0.25 | experimental | [1] Zhou 2008; _cites Saccone 1998_ [doi](https://doi.org/10.1016/s0966-9795%2897%2900066-6) | Table I, p. 2, row 21; `ORC-SNF53RS3MQ` |  |
| 1333.3 | β -> liq + δ | β: Sm 0.2; liq: Sm 0.14; δ: Sm 0.25 | model | [1] Zhou 2008 | Table I, p. 2, row 19; `ORC-NURCRGVDKW` |  |
| 1329.4 | β -> liq + α | α: Al 0.785714, Sm 0.214286 | model | [1] Zhou 2008 | Table I, p. 2, row 44; `ORC-XYRVZ26F3R` |  |
| 1328 | β -> liq + δ | β: Sm 0.2; δ: Sm 0.25 | experimental | [1] Zhou 2008; _cites Buschow 1965_ | Table I, p. 2, row 22; `ORC-W4IPGAZVRB` |  |
| 1321.3 | β -> liq + α | α: Al 0.785714, Sm 0.214286 | model | [1] Zhou 2008; _cites Saccone 1998_ [doi](https://doi.org/10.1016/s0966-9795%2897%2900066-6) | Table I, p. 2, row 45; `ORC-2RUBYZWGKZ` |  |
| 1321.3 | β -> liq + δ | β: Sm 0.214; liq: Sm 0.112; δ: Sm 0.25 | model | [1] Zhou 2008; _cites Saccone 1998_ [doi](https://doi.org/10.1016/s0966-9795%2897%2900066-6) | Table I, p. 2, row 20; `ORC-7AKNSCPWVO` |  |
| 1233 | Liq + σ -> θ | Liq: Sm 0.578; σ: Sm 0.333; θ: Sm 0.5 | experimental | [1] Zhou 2008; _cites Saccone 1998_ [doi](https://doi.org/10.1016/s0966-9795%2897%2900066-6) | Table I, p. 2, row 26; `ORC-ITEJM5UGTC` |  |
| 1232.8 | Liq + σ -> θ | Liq: Sm 0.586; σ: Sm 0.333; θ: Sm 0.5 | model | [1] Zhou 2008 | Table I, p. 2, row 24; `ORC-CBAWBOYI7H` |  |
| 1215 | Liq + σ -> θ | Liq: Sm 0.617; σ: Sm 0.333; θ: Sm 0.5 | model | [1] Zhou 2008; _cites Saccone 1998_ [doi](https://doi.org/10.1016/s0966-9795%2897%2900066-6) | Table I, p. 2, row 25; `ORC-I4XSWEE4FI` |  |
| 1134.7 | Liq + θ -> χ | Liq: Sm 0.685; θ: Sm 0.667; χ: Sm 0.5 | model | [1] Zhou 2008 | Table I, p. 2, row 27; `ORC-NAGWYV7BOE` |  |
| 1133.15 | peritectic |  | experimental | [2] Saccone 1998 | p. 1; `ORC-BPDP2OHJEH.184afa` | “The following inter-metallic compounds exist: Sm2Al (peritectic decomposition, at 860°C) SmAl (per.dec.960"Q SmAl2 (melting point 148O"Q SmAls (peritectoidal decomposition at 113o"C), SmsAlr , (melting point -1380°C).” |
| 1133 | Liq + θ -> χ | Liq: Sm 0.698; θ: Sm 0.5; χ: Sm 0.667 | experimental | [1] Zhou 2008; _cites Saccone 1998_ [doi](https://doi.org/10.1016/s0966-9795%2897%2900066-6) | Table I, p. 2, row 29; `ORC-HIF3DNGUAB` |  |
| 1121.5 | Liq + θ -> χ | Liq: Sm 0.67; θ: Sm 0.5; χ: Sm 0.667 | model | [1] Zhou 2008; _cites Saccone 1998_ [doi](https://doi.org/10.1016/s0966-9795%2897%2900066-6) | Table I, p. 2, row 28; `ORC-BQQNSBKO4X` |  |
| 1059 | eutectic: Liq -> bcc + χ | Liq: Sm 0.833; bcc: Sm 0.94; χ: Sm 0.667 | model | [1] Zhou 2008 | Table I, p. 2, row 30; `ORC-X2JRY4QWX7` |  |
| 1039 | eutectic: Liq -> bcc + χ | Liq: Sm 0.793; bcc: Sm 0.891; χ: Sm 0.667 | model | [1] Zhou 2008; _cites Saccone 1998_ [doi](https://doi.org/10.1016/s0966-9795%2897%2900066-6) | Table I, p. 2, row 31; `ORC-UKLDFCY5SV` |  |
| 1033.15 | eutectic |  | experimental | [2] Saccone 1998; _cites Saccone 1992_ | p. 9; `ORC-WZB33GMHJO` | “This region is characterised by the eutectic (20 at%Al, 760°C) formed by (YSm) and SmzAl.” |
| 1033 | eutectic: Liq -> bcc + χ | Liq: Sm 0.789; bcc: Sm 0.879; χ: Sm 0.667 | experimental | [1] Zhou 2008; _cites Saccone 1998_ [doi](https://doi.org/10.1016/s0966-9795%2897%2900066-6) | Table I, p. 2, row 32; `ORC-DMVOVMAHP3` |  |
| 1013 | eutectic: Liq -> bcc + χ | χ: Sm 0.667 | experimental | [1] Zhou 2008; _cites Buschow 1965_ | Table I, p. 2, row 33; `ORC-OA6PVAELQG` |  |
| 974.5 | Bcc -> rho + χ | rho: Sm 1; χ: Sm 0.667; bcc: Sm 0.957 | model | [1] Zhou 2008 | Table I, p. 2, row 34; `ORC-LFHWPCCDQF` |  |
| 973.6 | Bcc -> rho + χ | rho: Sm 0.963; χ: Sm 0.667; bcc: Sm 0.9 | model | [1] Zhou 2008; _cites Saccone 1998_ [doi](https://doi.org/10.1016/s0966-9795%2897%2900066-6) | Table I, p. 2, row 35; `ORC-6VTOXUJTRD` |  |
| 973 | Bcc -> rho + χ | rho: Sm 0.958; χ: Sm 0.667; bcc: Sm 0.9 | experimental | [1] Zhou 2008; _cites Saccone 1998_ [doi](https://doi.org/10.1016/s0966-9795%2897%2900066-6) | Table I, p. 2, row 36; `ORC-7FQLQ3QNJR` |  |
| 919.5 | eutectic: Liq -> fcc + δ | fcc: Sm 0; δ: Sm 0.25; liq: Sm 0.019 | model | [1] Zhou 2008 | Table I, p. 2, row 37; `ORC-N555SAY5TN` |  |
| 908 | eutectic: Liq -> fcc + α | fcc: Sm 0; α: Sm 0.214; liq: Sm 0.03 | experimental | [1] Zhou 2008; _cites Guo 1995_ [doi](https://doi.org/10.1016/0167-577x%2895%2900066-6) | Table I, p. 2, row 42; `ORC-ZWGJM37ALJ` |  |
| 906.2 | eutectic: Liq -> fcc + α | fcc: Sm 0; α: Sm 0.214; liq: Sm 0.034 | model | [1] Zhou 2008 | Table I, p. 2, row 40; `ORC-M3KM65BJED` |  |
| 906 | eutectic: Liq -> fcc + δ | fcc: Sm 0; δ: Sm 0.25 | experimental | [1] Zhou 2008; _cites Casteels 1967_ [doi](https://doi.org/10.1016/0022-5088%2867%2990116-6) | Table I, p. 2, row 39; `ORC-ZHBLMHN6A3` |  |
| 903 | eutectic: Liq -> fcc + δ | fcc: Sm 0; δ: Sm 0.25 | experimental | [1] Zhou 2008; _cites Buschow 1965_ | Table I, p. 2, row 38; `ORC-64JHSAUNHI` |  |
| 897.8 | eutectic: Liq -> fcc + α | fcc: Sm 0; α: Sm 0.214; liq: Sm 0.03 | model | [1] Zhou 2008; _cites Saccone 1998_ [doi](https://doi.org/10.1016/s0966-9795%2897%2900066-6) | Table I, p. 2, row 41; `ORC-7FO24VLPEX` |  |
| 873 | polymorphic: β -> γ | β: Al 0.8, Sm 0.2; γ: Al 0.8, Sm 0.2 | model | [1] Zhou 2008 | Table I, p. 2, row 46; `ORC-IVJMFI3NWU` |  |
| 873 | polymorphic: β -> γ | β: Al 0.8, Sm 0.2; γ: Al 0.8, Sm 0.2 | experimental | [1] Zhou 2008; _cites Guo 1995_ [doi](https://doi.org/10.1016/0167-577x%2895%2900066-6) | Table I, p. 2, row 47; `ORC-RO2CT6SGWC` |  |
| 873 | polymorphic: β -> γ | β: Al 0.8, Sm 0.2; γ: Al 0.8, Sm 0.2 | experimental | [1] Zhou 2008; _cites Rizzi 2001_ [doi](https://doi.org/10.1016/s0921-5093%2800%2901537-9) | Table I, p. 2, row 48; `ORC-WN2GGFVG7M` |  |

## Other properties

### Phase transition (2)

Table: Phase transition, Al–Sm system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase transition | 1644.9 K | 1644.9 | congruent transformation | model | [1] Zhou 2008; _cites Saccone 1998_ [doi](https://doi.org/10.1016/s0966-9795%2897%2900066-6) | p. 9; `ORC-TWJBIOVWUE.8b43f7` | “Our model yields a eutectic (L fi b + r) temperature of 1585 K, where the previously reported model gives 1643.5 K, a value almost equal to the congruent melting temperature of 1644.9 K for the Al4Sm-b phase.\[20\]” |
| Phase transition | 1653.15 K | 1653.15 | SmsAlr | experimental | [2] Saccone 1998 | p. 1; `ORC-BPDP2OHJEH.1bcece` | “The following inter-metallic compounds exist: Sm2Al (peritectic decomposition, at 860°C) SmAl (per.dec.960"Q SmAl2 (melting point 148O"Q SmAls (peritectoidal decomposition at 113o"C), SmsAlr , (melting point -1380°C).” |

### Phase equilibrium (5)

Table: Phase equilibrium, Al–Sm system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase assemblage |  | 973.15 | (@m) + Sm2A1; _alloy: Al 0.1_ | experimental | [2] Saccone 1998; _cites Saccone 1992_ | p. 9; `ORC-Q7GYJV4F6D` | “The ($m), which dissolves up to 12 at% Al at 760°C undergoes a eutectoidal decomposition in (@m) and Sm2A1 (10 at% Al, 700°C) (see the microphotograph, Fig. 9).” |
| Phase composition |  |  | σ + δ; _σ: Al 0.693, Sm 0.307; δ: Al 0.769, Sm 0.231_ | experimental | [1] Zhou 2008 | Table II, p. 3, row 1; `ORC-XPDJ2NDTP3` |  |
| Phase composition |  | 1373 | σ + δ; _σ: Al 0.684, Sm 0.316; δ: Al 0.754, Sm 0.246_ | experimental | [1] Zhou 2008 | Table II, p. 3, row 2; `ORC-MCDKNAQFGK` |  |
| Phase composition |  | 1453 | σ + β; _σ: Al 0.686, Sm 0.314; β: Al 0.79, Sm 0.21_ | experimental | [1] Zhou 2008 | Table II, p. 3, row 4; `ORC-4V2FVOZA75` |  |
| Phase composition |  | 1453 | σ + δ + β; _σ: Al 0.687, Sm 0.313; δ: Al 0.756, Sm 0.244; β: Al 0.786, Sm 0.214_ | experimental | [1] Zhou 2008 | Table II, p. 3, row 3; `ORC-PF2OMXGB26` |  |

### Crystal structure (24)

Table: Crystal structure, Al–Sm system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Lattice a | 6.654 Å | 298.15 | Sm2Al; _alloy: Sm 0.666667_ | unspecified | [2] Saccone 1998 | Table 1, p. 8, row 4; `ORC-3GTYT4V4KW.89861f` |  |
| Lattice a | 6.662 Å | 298.15 | Sm2Al; _alloy: Sm 0.666667_ | unspecified | [2] Saccone 1998 | Table 1, p. 8, row 5; `ORC-7OFLU4V5K3.b13711` |  |
| Lattice a | 4.284 Å | 298.15 | Sm3Al11; _alloy: Sm 0.214286_ | unspecified | [2] Saccone 1998 | Table 1, p. 8, row 12; `ORC-C4KCS6OQ5Q.1489a2` |  |
| Lattice a | 4.28 Å | 298.15 | Sm3Al11; _alloy: Sm 0.214286_ | unspecified | [2] Saccone 1998 | Table 1, p. 8, row 13; `ORC-T55C6RI5AH.956e2a` |  |
| Lattice a | 4.333 Å | 298.15 | Sm3Al11 (metastable?); _alloy: Sm 0.214286_ | unspecified | [2] Saccone 1998 | Table 1, p. 8, row 14; `ORC-P263PVRZ7L.5b43ab` |  |
| Lattice a | 5.901 Å | 298.15 | SmAl; _alloy: Sm 0.5_ | unspecified | [2] Saccone 1998 | Table 1, p. 8, row 7; `ORC-MB6WCTYUHL.05d73b` |  |
| Lattice a | 5.899 Å | 298.15 | SmAl; _alloy: Sm 0.5_ | unspecified | [2] Saccone 1998 | Table 1, p. 8, row 6; `ORC-SKNU5EOQLR.8e5957` |  |
| Lattice a | 7.942 Å | 298.15 | SmAl2; _alloy: Sm 0.333333_ | unspecified | [2] Saccone 1998 | Table 1, p. 8, row 8; `ORC-3FU7Y3N63Q` |  |
| Lattice a | 7.943 Å | 298.15 | SmAl2; _alloy: Sm 0.333333_ | unspecified | [2] Saccone 1998 | Table 1, p. 8, row 9; `ORC-3U3MWX7BO3` |  |
| Lattice a | 6.38 Å | 298.15 | SmAl3; _alloy: Sm 0.25_ | unspecified | [2] Saccone 1998 | Table 1, p. 8, row 10; `ORC-TFXCWEQYID.3350a0` |  |
| Lattice a | 6.382 Å | 298.15 | SmAl3; _alloy: Sm 0.25_ | unspecified | [2] Saccone 1998 | Table 1, p. 8, row 11; `ORC-YIXZJTYDKN.6b3dab` |  |
| Lattice b | 5.193 Å | 298.15 | Sm2Al; _alloy: Sm 0.666667_ | unspecified | [2] Saccone 1998 | Table 1, p. 8, row 4; `ORC-3GTYT4V4KW.7cf650` |  |
| Lattice b | 5.19 Å | 298.15 | Sm2Al; _alloy: Sm 0.666667_ | unspecified | [2] Saccone 1998 | Table 1, p. 8, row 5; `ORC-7OFLU4V5K3.cc0e82` |  |
| Lattice b | 12.81 Å | 298.15 | Sm3Al11 (metastable?); _alloy: Sm 0.214286_ | unspecified | [2] Saccone 1998 | Table 1, p. 8, row 14; `ORC-P263PVRZ7L.98dcc8` |  |
| Lattice b | 11.602 Å | 298.15 | SmAl; _alloy: Sm 0.5_ | unspecified | [2] Saccone 1998 | Table 1, p. 8, row 7; `ORC-MB6WCTYUHL.784e3c` |  |
| Lattice b | 11.62 Å | 298.15 | SmAl; _alloy: Sm 0.5_ | unspecified | [2] Saccone 1998 | Table 1, p. 8, row 6; `ORC-SKNU5EOQLR.72d6c0` |  |
| Lattice c | 9.631 Å | 298.15 | Sm2Al; _alloy: Sm 0.666667_ | unspecified | [2] Saccone 1998 | Table 1, p. 8, row 4; `ORC-3GTYT4V4KW.cda9a3` |  |
| Lattice c | 9.625 Å | 298.15 | Sm2Al; _alloy: Sm 0.666667_ | unspecified | [2] Saccone 1998 | Table 1, p. 8, row 5; `ORC-7OFLU4V5K3.121b48` |  |
| Lattice c | 9.9 Å | 298.15 | Sm3Al11; _alloy: Sm 0.214286_ | unspecified | [2] Saccone 1998 | Table 1, p. 8, row 12; `ORC-C4KCS6OQ5Q.cb40c0` |  |
| Lattice c | 9.97 Å | 298.15 | Sm3Al11 (metastable?); _alloy: Sm 0.214286_ | unspecified | [2] Saccone 1998 | Table 1, p. 8, row 14; `ORC-P263PVRZ7L.fc478e` |  |
| Lattice c | 5.688 Å | 298.15 | SmAl; _alloy: Sm 0.5_ | unspecified | [2] Saccone 1998 | Table 1, p. 8, row 7; `ORC-MB6WCTYUHL.70642e` |  |
| Lattice c | 5.678 Å | 298.15 | SmAl; _alloy: Sm 0.5_ | unspecified | [2] Saccone 1998 | Table 1, p. 8, row 6; `ORC-SKNU5EOQLR.843329` |  |
| Lattice c | 4.597 Å | 298.15 | SmAl3; _alloy: Sm 0.25_ | unspecified | [2] Saccone 1998 | Table 1, p. 8, row 10; `ORC-TFXCWEQYID.c23471` |  |
| Lattice c | 4.6 Å | 298.15 | SmAl3; _alloy: Sm 0.25_ | unspecified | [2] Saccone 1998 | Table 1, p. 8, row 11; `ORC-YIXZJTYDKN.c06623` |  |

## Sources

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

1. S.H. Zhou, R.E. Napolitano, Modeling of Thermodynamic Properties and Phase Equilibria for the Al-Sm Binary System, Metall Mater Trans A 39, 502-512 (2008). [doi:10.1007/s11661-007-9445-6](https://doi.org/10.1007/s11661-007-9445-6)
2. A. Saccone, G. Cacciamani, D. Macciò, G. Borzone, R. Ferro, Contribution to the study of the alloys and intermetallic compounds of aluminium with the rare-earth metals, Intermetallics 6, 201-215 (1998). [doi:10.1016/s0966-9795(97)00066-6](https://doi.org/10.1016/s0966-9795%2897%2900066-6)

## 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/).