# Mg–Pr system

> Mg–Pr system: 103 accepted literature values (invariant reaction 78, crystal structure 11, phase transition 9, formation 5) and 3 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

HTML: https://data.orchid-project.org/systems/MG-PR.html · Markdown: https://data.orchid-project.org/systems/MG-PR.md

103 accepted literature values from 4 paper(s) (experimental 45, model 47, unspecified 11); 3 calculated phase diagram(s). 7 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/MG-PR.json) · [CSV](https://data.orchid-project.org/systems/MG-PR.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#MG-PR) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#MG-PR/MgPr-05Guo.json) · [phases (11)](https://data.orchid-project.org/phases/pages/MG-PR.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/MG-PR.html) · [Markdown](https://data.orchid-project.org/systems/MG-PR.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 45 |
| model | 47 |
| unspecified | 11 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 78 |
| phase transition | 9 |
| formation | 5 |
| crystal structure | 11 |

## 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 |
|---|---|---|---|
| MgPr-05Guo.tdb | C. Guo, Z. Du, J. Alloys Compd., 399, 183-88(2005). [doi:10.1016/j.jallcom.2005.03.033](https://doi.org/10.1016/j.jallcom.2005.03.033) | `663c0d9edf4eb1066ea9fb5e1acb1dd97e3ec01a827790b973ad0b2f3c23edce` | [viewer](https://orchid-project.org/phase-diagrams/#MG-PR/MgPr-05Guo.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/MgPr-05Guo.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/MgPr-05Guo.json) |
| MgPr-08Guo.tdb | C. Guo, Z. Du, C.Li, Calphad, 32, 177-87(2008). [doi:10.1016/j.calphad.2007.05.007](https://doi.org/10.1016/j.calphad.2007.05.007) | `33b8964cbc88b29cc3c782bff0910722e4378f6dc26f273052264bbd89a54d73` | [viewer](https://orchid-project.org/phase-diagrams/#MG-PR/MgPr-08Guo.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/MgPr-08Guo.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/MgPr-08Guo.json) |
| MgPr-15Wan.tdb | P. Wang, R. Schmid-Fetzer, Comput. Mater. Sci., 104, 138-42(2015). [doi:10.1016/j.commatsci.2014.11.050](https://doi.org/10.1016/j.commatsci.2014.11.050) | `43684dde82c30e772cf1df6053c9c4af9ac378d9d369e6595a906903ac0ade46` | [viewer](https://orchid-project.org/phase-diagrams/#MG-PR/MgPr-15Wan.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/MgPr-15Wan.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/MgPr-15Wan.json) |

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

| TDB file | T (K) | Phases at the invariant |
|---|---:|---|
| MgPr-05Guo.tdb | 1068 | DHCP (x(Pr) 1) + MGPR_B2 (x(Pr) 1) + BCC_A2 (x(Pr) 1) |
| MgPr-05Guo.tdb | 1012.71 | MG3PR_D03 (x(Pr) 0.24952) + MG2PR_C15 (x(Pr) 0.33333) + LIQUID (x(Pr) 0.34637) |
| MgPr-05Guo.tdb | 1006.75 | MGPR_B2 (x(Pr) 0.51601) + LIQUID (x(Pr) 0.59909) + BCC_A2 (x(Pr) 0.63957) |
| MgPr-05Guo.tdb | 1006.75 | MGPR_B2 (x(Pr) 0.51601) + LIQUID (x(Pr) 0.59909) + BCC_A2 (x(Pr) 0.63957) |
| MgPr-05Guo.tdb | 993.5 | MG2PR_C15 (x(Pr) 0.33333) + LIQUID (x(Pr) 0.3888) + MGPR_B2 (x(Pr) 0.48132) |
| MgPr-05Guo.tdb | 993.5 | MG2PR_C15 (x(Pr) 0.33333) + LIQUID (x(Pr) 0.3888) + MGPR_B2 (x(Pr) 0.48132) |
| MgPr-05Guo.tdb | 932.78 | MG3PR_D03 (x(Pr) 0.24987) + MG2PR_C15 (x(Pr) 0.33333) + MGPR_B2 (x(Pr) 0.4809) |
| MgPr-05Guo.tdb | 932.78 | MG3PR_D03 (x(Pr) 0.24987) + MG2PR_C15 (x(Pr) 0.33333) + MGPR_B2 (x(Pr) 0.4809) |
| MgPr-05Guo.tdb | 843.87 | LIQUID (x(Pr) 0.08245) + MG41PR5 (x(Pr) 0.10754) + MG3PR_D03 (x(Pr) 0.17988) |
| MgPr-05Guo.tdb | 839.71 | LIQUID (x(Pr) 0.07644) + MG12PR_D2B (x(Pr) 0.07692) + MG41PR5 (x(Pr) 0.10723) |
| MgPr-05Guo.tdb | 839.71 | LIQUID (x(Pr) 0.07632) + MG12PR_D2B (x(Pr) 0.07692) + MG41PR5 (x(Pr) 0.10722) |
| MgPr-05Guo.tdb | 837.95 | HCP_A3 (x(Pr) 0.00141) + LIQUID (x(Pr) 0.06557) + MG12PR_D2B (x(Pr) 0.07692) |
| MgPr-05Guo.tdb | 837.95 | HCP_A3 (x(Pr) 0.0014) + LIQUID (x(Pr) 0.06539) + MG12PR_D2B (x(Pr) 0.07692) |
| MgPr-05Guo.tdb | 783.34 | MGPR_B2 (x(Pr) 0.52271) + BCC_A2 (x(Pr) 0.8065) + DHCP (x(Pr) 0.91353) |
| MgPr-05Guo.tdb | 783.34 | MGPR_B2 (x(Pr) 0.52271) + BCC_A2 (x(Pr) 0.8065) + DHCP (x(Pr) 0.91353) |
| MgPr-08Guo.tdb | 1007.88 | B2_BCC (x(Pr) 0.5249) + LIQUID (x(Pr) 0.60968) + B2_BCC#2 (x(Pr) 0.66017) |
| MgPr-08Guo.tdb | 1007.88 | B2_BCC (x(Pr) 0.5249) + LIQUID (x(Pr) 0.60968) + B2_BCC#2 (x(Pr) 0.66017) |
| MgPr-08Guo.tdb | 1004.43 | MG3PR_D03 (x(Pr) 0.24972) + MG2PR_C15 (x(Pr) 0.33333) + LIQUID (x(Pr) 0.35601) |
| MgPr-08Guo.tdb | 1004.43 | MG3PR_D03 (x(Pr) 0.24972) + MG2PR_C15 (x(Pr) 0.33333) + LIQUID (x(Pr) 0.35601) |
| MgPr-08Guo.tdb | 995.34 | MG2PR_C15 (x(Pr) 0.33333) + LIQUID (x(Pr) 0.37895) + B2_BCC (x(Pr) 0.45989) |
| MgPr-08Guo.tdb | 995.34 | MG2PR_C15 (x(Pr) 0.33333) + LIQUID (x(Pr) 0.37895) + B2_BCC (x(Pr) 0.45989) |
| MgPr-08Guo.tdb | 940.75 | MG3PR_D03 (x(Pr) 0.24988) + MG2PR_C15 (x(Pr) 0.33333) + B2_BCC (x(Pr) 0.4693) |
| MgPr-08Guo.tdb | 940.75 | MG3PR_D03 (x(Pr) 0.24988) + MG2PR_C15 (x(Pr) 0.33333) + B2_BCC (x(Pr) 0.46933) |
| MgPr-08Guo.tdb | 940.75 | MG3PR_D03 (x(Pr) 0.24988) + MG2PR_C15 (x(Pr) 0.33333) + B2_BCC (x(Pr) 0.46933) |
| MgPr-08Guo.tdb | 848.94 | LIQUID (x(Pr) 0.08255) + MG41PR5 (x(Pr) 0.1087) + MG3PR_D03 (x(Pr) 0.22483) |
| MgPr-08Guo.tdb | 837.44 | LIQUID (x(Pr) 0.06762) + MG12PR_D2B (x(Pr) 0.07692) + MG41PR5 (x(Pr) 0.1087) |
| MgPr-08Guo.tdb | 837.03 | HCP_A3 (x(Pr) 6.400e-4) + LIQUID (x(Pr) 0.06598) + MG12PR_D2B (x(Pr) 0.07692) |
| MgPr-08Guo.tdb | 783.19 | B2_BCC (x(Pr) 0.52736) + B2_BCC#2 (x(Pr) 0.8097) + DHCP (x(Pr) 0.92786) |
| MgPr-08Guo.tdb | 783.19 | B2_BCC (x(Pr) 0.52736) + B2_BCC#2 (x(Pr) 0.8097) + DHCP (x(Pr) 0.92786) |
| MgPr-15Wan.tdb | 1012.8 | MG3PR_D03 (x(Pr) 0.25) + MG2PR_C15 (x(Pr) 0.33333) + LIQUID (x(Pr) 0.35045) |
| MgPr-15Wan.tdb | 1010.81 | MGPR_B2 (x(Pr) 0.49915) + LIQUID (x(Pr) 0.60679) + BCC_A2 (x(Pr) 0.69792) |
| MgPr-15Wan.tdb | 998.43 | MG2PR_C15 (x(Pr) 0.33333) + LIQUID (x(Pr) 0.38688) + MGPR_B2 (x(Pr) 0.49262) |
| MgPr-15Wan.tdb | 942.78 | MG3PR_D03 (x(Pr) 0.25) + MG2PR_C15 (x(Pr) 0.33333) + MGPR_B2 (x(Pr) 0.49306) |
| MgPr-15Wan.tdb | 862.94 | LIQUID (x(Pr) 0.08789) + MG41PR5 (x(Pr) 0.1087) + MG3PR_D03 (x(Pr) 0.25) |
| MgPr-15Wan.tdb | 852.72 | LIQUID (x(Pr) 0.06927) + MG12PR_D2B (x(Pr) 0.07692) + MG41PR5 (x(Pr) 0.1087) |
| MgPr-15Wan.tdb | 852.72 | LIQUID (x(Pr) 0.06927) + MG12PR_D2B (x(Pr) 0.07692) + MG41PR5 (x(Pr) 0.1087) |
| MgPr-15Wan.tdb | 849.8 | HCP_A3 (x(Pr) 0.00237) + LIQUID (x(Pr) 0.05805) + MG12PR_D2B (x(Pr) 0.07692) |
| MgPr-15Wan.tdb | 849.8 | HCP_A3 (x(Pr) 0.00237) + LIQUID (x(Pr) 0.05802) + MG12PR_D2B (x(Pr) 0.07692) |
| MgPr-15Wan.tdb | 782.6 | MGPR_B2 (x(Pr) 0.49996) + BCC_A2 (x(Pr) 0.80183) + DHCP (x(Pr) 0.93225) |

Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/MG/MG-PR.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/MG/MG-PR.json) · [CALPHAD hull MgPr-05Guo](https://data.orchid-project.org/hulls/calphad-sgte/MG/MG-PR--MgPr-05Guo.json) · [CALPHAD hull MgPr-08Guo](https://data.orchid-project.org/hulls/calphad-sgte/MG/MG-PR--MgPr-08Guo.json)

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Mg–Pr system (78)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 1093.15 | congruent melting: Liquid = PrMg3 | Liquid: Mg 0.75, Pr 0.25; PrMg3: Mg 0.75, Pr 0.25 | experimental | [1] Wang 2015; _cites Saccone 1993_ [doi](https://doi.org/10.1016/0966-9795%2893%2990010-s) | Table 3, p. 4, row 15; `ORC-633HMZSPJZ` |  |
| 1063.15 | congruent melting: Liquid = PrMg3 | Liquid: Mg 0.75, Pr 0.25; PrMg3: Mg 0.75, Pr 0.25 | experimental | [1] Wang 2015; _cites Rokhlin 2003_ | Table 3, p. 4, row 16; `ORC-DRCHUJERFS` |  |
| 1063.15 | congruent melting: Liquid = PrMg3 | Liquid: Mg 0.75, Pr 0.25; PrMg3: Mg 0.75, Pr 0.25 | model | [1] Wang 2015 | Table 3, p. 4, row 18; `ORC-WBR2NTPIY2` |  |
| 1062.75 | congruent melting: Liquid = PrMg3 | Liquid: Mg 0.75, Pr 0.25; PrMg3: Mg 0.75, Pr 0.25 | model | [1] Wang 2015; _cites Guo 2008_ [doi](https://doi.org/10.1016/j.calphad.2007.05.007) | Table 3, p. 4, row 17; `ORC-AM2NK3HNNR` |  |
| 1043.15 | congruent melting: Liquid = PrMg | Liquid: Mg 0.5, Pr 0.5; PrMg: Mg 0.5, Pr 0.5 | experimental | [1] Wang 2015; _cites Saccone 1993_ [doi](https://doi.org/10.1016/0966-9795%2893%2990010-s) | Table 3, p. 4, row 33; `ORC-ERNH72RJGY` |  |
| 1038.15 | congruent melting: Liquid = PrMg | Liquid: Mg 0.5, Pr 0.5; PrMg: Mg 0.5, Pr 0.5 | experimental | [1] Wang 2015; _cites Rokhlin 2003_ | Table 3, p. 4, row 34; `ORC-U6UI4KVCAB` |  |
| 1038.05 | congruent melting: Liquid = PrMg | Liquid: Mg 0.5, Pr 0.5; PrMg: Mg 0.5, Pr 0.5 | model | [1] Wang 2015; _cites Guo 2008_ [doi](https://doi.org/10.1016/j.calphad.2007.05.007) | Table 3, p. 4, row 35; `ORC-HF7LN6XVAX` |  |
| 1035.85 | congruent melting: Liquid = PrMg | Liquid: Mg 0.5, Pr 0.5; PrMg: Mg 0.5, Pr 0.5 | model | [1] Wang 2015 | Table 3, p. 4, row 36; `ORC-MQZ65RBABL` |  |
| 1023.15 | Liquid + PrMg3 = PrMg2 | PrMg3: Mg 0.75, Pr 0.25; PrMg2: Mg 0.666667, Pr 0.333333 | experimental | [1] Wang 2015; _cites Saccone 1993_ [doi](https://doi.org/10.1016/0966-9795%2893%2990010-s) | Table 3, p. 4, row 19; `ORC-XQ7V7UXGOU` |  |
| 1018.15 | Liquid = PrMg + βPr | PrMg: Mg 0.5, Pr 0.5 | experimental | [1] Wang 2015; _cites Saccone 1993_ [doi](https://doi.org/10.1016/0966-9795%2893%2990010-s) | Table 3, p. 4, row 37; `ORC-WTLQ63DOVD` |  |
| 1013.15 | Liquid + PrMg3 = PrMg2 | PrMg3: Mg 0.75, Pr 0.25; PrMg2: Mg 0.666667, Pr 0.333333 | experimental | [1] Wang 2015; _cites Rokhlin 2003_ | Table 3, p. 4, row 20; `ORC-CRXHDWJAAH` |  |
| 1013 | liq. + Mg3Pr -> Mg2Pr | liq.: Pr 0.3464; Mg3Pr: Pr 0.2495; Mg2Pr: Pr 0.333333 | model | [2] Guo 2005 | Table 2, p. 5, row 9; `ORC-BETMPRBMYF` |  |
| 1013 | liq. + Mg3Pr -> Mg2Pr | liq.: Pr 0.391; Mg3Pr: Pr 0.25; Mg2Pr: Pr 0.333333 | experimental | [2] Guo 2005; _cites Saccone 1993_ [doi](https://doi.org/10.1016/0966-9795%2893%2990010-s) | Table 2, p. 5, row 10; `ORC-EIC4M5SE6A` |  |
| 1013 | liq. + Mg3Pr -> Mg2Pr | L: Pr 0.3479; Mg3Pr: Pr 0.2495; Mg2Pr: Pr 0.333333 | model | [3] Guo 2008 | Table 2, p. 5, row 9; `ORC-FGDGACXSBE` |  |
| 1013 | liq. + Mg3Pr -> Mg2Pr | L: Pr 0.391; Mg3Pr: Pr 0.25; Mg2Pr: Pr 0.333333 | experimental | [3] Guo 2008; _cites Saccone 2001_ [doi](https://doi.org/10.1016/s0925-8388%2800%2901377-3) | Table 2, p. 5, row 10; `ORC-UTW4ZZTDKR` |  |
| 1012.85 | Liquid + PrMg3 = PrMg2 | PrMg3: Mg 0.75, Pr 0.25; PrMg2: Mg 0.666667, Pr 0.333333 | model | [1] Wang 2015 | Table 3, p. 4, row 23; `ORC-A4J4JMZWT4` |  |
| 1012.55 | Liquid + PrMg3 = PrMg2 | PrMg3: Mg 0.75, Pr 0.25; PrMg2: Mg 0.666667, Pr 0.333333 | model | [1] Wang 2015; _cites Guo 2008_ [doi](https://doi.org/10.1016/j.calphad.2007.05.007) | Table 3, p. 4, row 21; `ORC-L2B5M742L2` |  |
| 1011.15 | Liquid + PrMg3 = PrMg2 | PrMg3: Mg 0.75, Pr 0.25; PrMg2: Mg 0.666667, Pr 0.333333 | model | [1] Wang 2015; _cites Kang 2012_ [doi](https://doi.org/10.1016/j.calphad.2012.05.005) | Table 3, p. 4, row 22; `ORC-PM2TXXVGSP` |  |
| 1010.85 | Liquid = PrMg + βPr | PrMg: Mg 0.5, Pr 0.5 | model | [1] Wang 2015 | Table 3, p. 4, row 41; `ORC-77SV54ABRS` |  |
| 1008.15 | Liquid = PrMg + βPr | PrMg: Mg 0.5, Pr 0.5 | experimental | [1] Wang 2015; _cites Rokhlin 2003_ | Table 3, p. 4, row 38; `ORC-PC2IAKFUBO` |  |
| 1008 | eutectic: liq. -> bcc(Pr) + MgPr | liq.: Pr 0.6; bcc(Pr): Pr 0.669; MgPr: Pr 0.528 | experimental | [2] Guo 2005; _cites Saccone 1993_ [doi](https://doi.org/10.1016/0966-9795%2893%2990010-s) | Table 2, p. 5, row 18; `ORC-G5FRFYVYHV` |  |
| 1008 | eutectic: liq. -> bcc(Pr) + MgPr | L: Pr 0.6097; bcc(Pr): Pr 0.6602; MgPr: Pr 0.5249 | model | [3] Guo 2008 | Table 2, p. 5, row 1; `ORC-KUKLA6TRIE` |  |
| 1008 | eutectic: liq. -> bcc(Pr) + MgPr | L: Pr 0.6; bcc(Pr): Pr 0.669; MgPr: Pr 0.528 | experimental | [3] Guo 2008; _cites Saccone 2001_ [doi](https://doi.org/10.1016/s0925-8388%2800%2901377-3) | Table 2, p. 5, row 2; `ORC-SIT6WR7HS7` |  |
| 1008 | eutectic: liq. -> bcc(Pr) + MgPr | liq.: Pr 0.601; bcc(Pr): Pr 0.6418; MgPr: Pr 0.5136 | model | [2] Guo 2005 | Table 2, p. 5, row 17; `ORC-V2OW6TLBQD` |  |
| 1007.85 | Liquid = PrMg + βPr | PrMg: Mg 0.5, Pr 0.5 | model | [1] Wang 2015; _cites Guo 2008_ [doi](https://doi.org/10.1016/j.calphad.2007.05.007) | Table 3, p. 4, row 39; `ORC-ESUOOXI4NA` |  |
| 1006.15 | Liquid = PrMg + βPr | PrMg: Mg 0.5, Pr 0.5 | model | [1] Wang 2015; _cites Kang 2012_ [doi](https://doi.org/10.1016/j.calphad.2012.05.005) | Table 3, p. 4, row 40; `ORC-INY7KKCXVU` |  |
| 1003.15 | Liquid = PrMg + PrMg2 | PrMg: Mg 0.5, Pr 0.5; PrMg2: Mg 0.666667, Pr 0.333333 | experimental | [1] Wang 2015; _cites Saccone 1993_ [doi](https://doi.org/10.1016/0966-9795%2893%2990010-s) | Table 3, p. 4, row 24; `ORC-LCVN4YE7Z7` |  |
| 998.45 | Liquid = PrMg + PrMg2 | PrMg: Mg 0.5, Pr 0.5; PrMg2: Mg 0.666667, Pr 0.333333 | model | [1] Wang 2015 | Table 3, p. 4, row 27; `ORC-J23WOZG722` |  |
| 998.25 | Liquid = PrMg + PrMg2 | PrMg: Mg 0.5, Pr 0.5; PrMg2: Mg 0.666667, Pr 0.333333 | model | [1] Wang 2015; _cites Guo 2008_ [doi](https://doi.org/10.1016/j.calphad.2007.05.007) | Table 3, p. 4, row 26; `ORC-JW3X33FQI4` |  |
| 998.15 | Liquid = PrMg + PrMg2 | PrMg: Mg 0.5, Pr 0.5; PrMg2: Mg 0.666667, Pr 0.333333 | experimental | [1] Wang 2015; _cites Rokhlin 2003_ | Table 3, p. 4, row 25; `ORC-664XMG7IAN` |  |
| 998 | eutectic: liq -> MgPr + Mg2Pr | liq: Pr 0.405; MgPr: Pr 0.46; Mg2Pr: Pr 0.333333 | experimental | [2] Guo 2005; _cites Saccone 1993_ [doi](https://doi.org/10.1016/0966-9795%2893%2990010-s) | Table 2, p. 5, row 14; `ORC-B7WJZ7FJZZ` |  |
| 998 | eutectic: liq -> MgPr + Mg2Pr | liq: Pr 0.3822; MgPr: Pr 0.4734; Mg2Pr: Pr 0.333333 | model | [2] Guo 2005 | Table 2, p. 5, row 13; `ORC-PILMGMAXOG` |  |
| 998 | eutectic: liq -> MgPr + Mg2Pr | L: Pr 0.405; MgPr: Pr 0.46; Mg2Pr: Pr 0.333333 | experimental | [3] Guo 2008; _cites Saccone 2001_ [doi](https://doi.org/10.1016/s0925-8388%2800%2901377-3) | Table 2, p. 5, row 8; `ORC-RAJ7KGK6DN` |  |
| 998 | eutectic: liq -> MgPr + Mg2Pr | L: Pr 0.3828; MgPr: Pr 0.4618; Mg2Pr: Pr 0.333333 | model | [3] Guo 2008 | Table 2, p. 5, row 7; `ORC-TBQHFDU4FD` |  |
| 953.15 | Mg2Pr = PrMg + PrMg3 | Mg2Pr: Mg 0.666667, Pr 0.333333; PrMg: Mg 0.5, Pr 0.5; PrMg3: Mg 0.75, Pr 0.25 | experimental | [1] Wang 2015; _cites Saccone 1993_ [doi](https://doi.org/10.1016/0966-9795%2893%2990010-s) | Table 3, p. 4, row 28; `ORC-DBEUGDS56C` |  |
| 943.15 | Mg2Pr = PrMg + PrMg3 | Mg2Pr: Mg 0.666667, Pr 0.333333; PrMg: Mg 0.5, Pr 0.5; PrMg3: Mg 0.75, Pr 0.25 | experimental | [1] Wang 2015; _cites Rokhlin 2003_ | Table 3, p. 4, row 29; `ORC-SMONBKR3E4` |  |
| 943.15 | Mg2Pr = PrMg + PrMg3 | Mg2Pr: Mg 0.666667, Pr 0.333333; PrMg: Mg 0.5, Pr 0.5; PrMg3: Mg 0.75, Pr 0.25 | model | [1] Wang 2015; _cites Guo 2008_ [doi](https://doi.org/10.1016/j.calphad.2007.05.007) | Table 3, p. 4, row 30; `ORC-VRLFTJZCI7` |  |
| 943 | Mg2Pr -> Mg3Pr + MgPr | Mg2Pr: Pr 0.333333; Mg3Pr: Pr 0.25; MgPr: Pr 0.475 | experimental | [2] Guo 2005; _cites Saccone 1993_ [doi](https://doi.org/10.1016/0966-9795%2893%2990010-s) | Table 2, p. 5, row 12; `ORC-23JJIPMELC` |  |
| 943 | Mg2Pr -> Mg3Pr + MgPr | Mg2Pr: Pr 0.333333; Mg3Pr: Pr 0.2498; MgPr: Pr 0.4688 | model | [3] Guo 2008 | Table 2, p. 5, row 13; `ORC-BQFX6KK2HN` |  |
| 943 | Mg2Pr -> Mg3Pr + MgPr | Mg2Pr: Pr 0.333333; Mg3Pr: Pr 0.25; MgPr: Pr 0.475 | experimental | [3] Guo 2008; _cites Saccone 2001_ [doi](https://doi.org/10.1016/s0925-8388%2800%2901377-3) | Table 2, p. 5, row 14; `ORC-PKQJWAQ7XL` |  |
| 943 | Mg2Pr -> Mg3Pr + MgPr | Mg2Pr: Pr 0.333333; Mg3Pr: Pr 0.2498; MgPr: Pr 0.4744 | model | [2] Guo 2005 | Table 2, p. 5, row 11; `ORC-ZMQXMW3XUU` |  |
| 942.75 | Mg2Pr = PrMg + PrMg3 | Mg2Pr: Mg 0.666667, Pr 0.333333; PrMg: Mg 0.5, Pr 0.5; PrMg3: Mg 0.75, Pr 0.25 | model | [1] Wang 2015 | Table 3, p. 4, row 32; `ORC-QTFELY4M3R` |  |
| 939.15 | Mg2Pr = PrMg + PrMg3 | Mg2Pr: Mg 0.666667, Pr 0.333333; PrMg: Mg 0.5, Pr 0.5; PrMg3: Mg 0.75, Pr 0.25 | model | [1] Wang 2015; _cites Kang 2012_ [doi](https://doi.org/10.1016/j.calphad.2012.05.005) | Table 3, p. 4, row 31; `ORC-6H5SOEQLGG` |  |
| 866.15 | Liquid + PrMg3 = Pr5Mg41 | PrMg3: Mg 0.75, Pr 0.25; Pr5Mg41: Mg 0.891304, Pr 0.108696 | model | [1] Wang 2015; _cites Kang 2012_ [doi](https://doi.org/10.1016/j.calphad.2012.05.005) | Table 3, p. 4, row 13; `ORC-QKAVQPHRW3` |  |
| 865.15 | Liquid + PrMg3 = Pr5Mg41 | PrMg3: Mg 0.75, Pr 0.25; Pr5Mg41: Mg 0.891304, Pr 0.108696 | experimental | [1] Wang 2015; _cites Saccone 1993_ [doi](https://doi.org/10.1016/0966-9795%2893%2990010-s) | Table 3, p. 4, row 10; `ORC-2ITE5JPES3` |  |
| 863.15 | Liquid + PrMg3 = Pr5Mg41 | PrMg3: Mg 0.75, Pr 0.25; Pr5Mg41: Mg 0.891304, Pr 0.108696 | experimental | [1] Wang 2015; _cites Rokhlin 2003_ | Table 3, p. 4, row 11; `ORC-UBCXLGI7OY` |  |
| 862.95 | Liquid + PrMg3 = Pr5Mg41 | PrMg3: Mg 0.75, Pr 0.25; Pr5Mg41: Mg 0.891304, Pr 0.108696 | model | [1] Wang 2015 | Table 3, p. 4, row 14; `ORC-IOIXHHYEVN` |  |
| 853.15 | Liquid + Pr5Mg41 = PrMg12 | Pr5Mg41: Mg 0.891304, Pr 0.108696; PrMg12: Mg 0.923077, Pr 0.076923 | experimental | [1] Wang 2015; _cites Rokhlin 2003_ | Table 3, p. 4, row 7; `ORC-GUVL6D3ZAL` |  |
| 852.75 | Liquid + Pr5Mg41 = PrMg12 | Pr5Mg41: Mg 0.891304, Pr 0.108696; PrMg12: Mg 0.923077, Pr 0.076923 | model | [1] Wang 2015 | Table 3, p. 4, row 9; `ORC-AFSX7PYKYT` |  |
| 849.95 | Liquid + PrMg3 = Pr5Mg41 | PrMg3: Mg 0.75, Pr 0.25; Pr5Mg41: Mg 0.891304, Pr 0.108696 | model | [1] Wang 2015; _cites Guo 2008_ [doi](https://doi.org/10.1016/j.calphad.2007.05.007) | Table 3, p. 4, row 12; `ORC-7LJHCYHGVC` |  |
| 849.85 | Liquid = (Mg) + PrMg12 | PrMg12: Mg 0.923077, Pr 0.076923 | model | [1] Wang 2015 | Table 3, p. 4, row 5; `ORC-5SWI74YEPZ` |  |
| 848.15 | Liquid = (Mg) + PrMg12 | PrMg12: Mg 0.923077, Pr 0.076923 | experimental | [1] Wang 2015; _cites Rokhlin 2003_ | Table 3, p. 4, row 2; `ORC-SRDSU2HB63` |  |
| 848 | liq. + Mg3Pr -> Mg41Pr5 | L: Pr 0.084; Mg3Pr: Pr 0.18; Mg41Pr5: Pr 0.108696 | experimental | [3] Guo 2008; _cites Saccone 2001_ [doi](https://doi.org/10.1016/s0925-8388%2800%2901377-3) | Table 2, p. 5, row 16; `ORC-GZIIGO346Z` |  |
| 848 | liq. + Mg3Pr -> Mg41Pr5 | L: Pr 0.0811; Mg3Pr: Pr 0.2194; Mg41Pr5: Pr 0.108696 | model | [3] Guo 2008 | Table 2, p. 5, row 15; `ORC-LNNDTRNU4H` |  |
| 847.15 | Liquid = (Mg) + PrMg12 | PrMg12: Mg 0.923077, Pr 0.076923 | model | [1] Wang 2015; _cites Kang 2012_ [doi](https://doi.org/10.1016/j.calphad.2012.05.005) | Table 3, p. 4, row 4; `ORC-WRVZNEIX6I` |  |
| 844 | liq. + Mg3Pr -> Mg41Pr5 | liq.: Pr 0.084; Mg3Pr: Pr 0.18; Mg41Pr5: Pr 0.111 | experimental | [2] Guo 2005; _cites Saccone 1993_ [doi](https://doi.org/10.1016/0966-9795%2893%2990010-s) | Table 2, p. 5, row 6; `ORC-DUVJZFPTS5` |  |
| 844 | liq. + Mg3Pr -> Mg41Pr5 | liq.: Pr 0.0825; Mg3Pr: Pr 0.1799; Mg41Pr5: Pr 0.1075 | model | [2] Guo 2005 | Table 2, p. 5, row 5; `ORC-OP76CU4NL4` |  |
| 843.15 | Liquid + Pr5Mg41 = PrMg12 | Pr5Mg41: Mg 0.891304, Pr 0.108696; PrMg12: Mg 0.923077, Pr 0.076923 | experimental | [1] Wang 2015; _cites Saccone 1993_ [doi](https://doi.org/10.1016/0966-9795%2893%2990010-s) | Table 3, p. 4, row 6; `ORC-H23CRMUAGR` |  |
| 840 | liq. + Mg41Pr5 -> Mg12Pr | liq.: Pr 0.074; Mg41Pr5: Pr 0.102; Mg12Pr: Pr 0.0769231 | experimental | [2] Guo 2005; _cites Saccone 1993_ [doi](https://doi.org/10.1016/0966-9795%2893%2990010-s) | Table 2, p. 5, row 4; `ORC-SXO5GVSI3H` |  |
| 840 | liq. + Mg41Pr5 -> Mg12Pr | liq.: Pr 0.0764; Mg41Pr5: Pr 0.1072; Mg12Pr: Pr 0.0769231 | model | [2] Guo 2005 | Table 2, p. 5, row 3; `ORC-XFJ6HL2GF7` |  |
| 838.15 | Liquid = (Mg) + PrMg12 | PrMg12: Mg 0.923077, Pr 0.076923 | experimental | [1] Wang 2015; _cites Saccone 1993_ [doi](https://doi.org/10.1016/0966-9795%2893%2990010-s) | Table 3, p. 4, row 1; `ORC-PX3B6GCJBZ` |  |
| 838 | liq. + Mg41Pr5 -> Mg12Pr | L: Pr 0.0676; Mg41Pr5: Pr 0.108696; Mg12Pr: Pr 0.0769231 | model | [3] Guo 2008 | Table 2, p. 5, row 17; `ORC-5DG3X3XS4I` |  |
| 838 | eutectic: liq. -> hcp(Mg) + Mg12Pr | liq.: Pr 0.0654; hcp(Mg): Pr 0.0014; Mg12Pr: Pr 0.0769231 | model | [2] Guo 2005 | Table 2, p. 5, row 1; `ORC-OASZ63UPHU` |  |
| 838 | liq. + Mg41Pr5 -> Mg12Pr | L: Pr 0.074; Mg41Pr5: Pr 0.108696; Mg12Pr: Pr 0.0769231 | experimental | [3] Guo 2008; _cites Saccone 2001_ [doi](https://doi.org/10.1016/s0925-8388%2800%2901377-3) | Table 2, p. 5, row 18; `ORC-R6QKGEOFKP` |  |
| 837.45 | Liquid + Pr5Mg41 = PrMg12 | Pr5Mg41: Mg 0.891304, Pr 0.108696; PrMg12: Mg 0.923077, Pr 0.076923 | model | [1] Wang 2015; _cites Guo 2008_ [doi](https://doi.org/10.1016/j.calphad.2007.05.007) | Table 3, p. 4, row 8; `ORC-JTVUCRPYLJ` |  |
| 837.05 | Liquid = (Mg) + PrMg12 | PrMg12: Mg 0.923077, Pr 0.076923 | model | [1] Wang 2015; _cites Guo 2008_ [doi](https://doi.org/10.1016/j.calphad.2007.05.007) | Table 3, p. 4, row 3; `ORC-XOLGLGUJDP` |  |
| 837 | eutectic: liq. -> hcp(Mg) + Mg12Pr | L: Pr 0.066; hcp(Mg): Pr 6.000e-4; Mg12Pr: Pr 0.0769231 | model | [3] Guo 2008 | Table 2, p. 5, row 19; `ORC-Y2KKQONBUE` |  |
| 833 | eutectic: liq. -> hcp(Mg) + Mg12Pr | L: Pr 0.05; hcp(Mg): Pr 0.001; Mg12Pr: Pr 0.0769231 | experimental | [3] Guo 2008; _cites Saccone 2001_ [doi](https://doi.org/10.1016/s0925-8388%2800%2901377-3) | Table 2, p. 5, row 20; `ORC-I4RBNXXJYH` |  |
| 833 | eutectic: liq. -> hcp(Mg) + Mg12Pr | liq.: Pr 0.05; hcp(Mg): Pr 0.001; Mg12Pr: Pr 0.0769231 | experimental | [2] Guo 2005; _cites Saccone 1993_ [doi](https://doi.org/10.1016/0966-9795%2893%2990010-s) | Table 2, p. 5, row 2; `ORC-PBDJI4WXEF` |  |
| 802.15 | βPr = PrMg + αPr | PrMg: Mg 0.5, Pr 0.5 | model | [1] Wang 2015; _cites Kang 2012_ [doi](https://doi.org/10.1016/j.calphad.2012.05.005) | Table 3, p. 4, row 45; `ORC-UHJQKPLJ4C` |  |
| 783.15 | βPr = PrMg + αPr | PrMg: Mg 0.5, Pr 0.5 | experimental | [1] Wang 2015; _cites Rokhlin 2003_ | Table 3, p. 4, row 43; `ORC-LM5XTJDZNK` |  |
| 783.15 | βPr = PrMg + αPr | PrMg: Mg 0.5, Pr 0.5 | model | [1] Wang 2015; _cites Guo 2008_ [doi](https://doi.org/10.1016/j.calphad.2007.05.007) | Table 3, p. 4, row 44; `ORC-TEI7U75KXN` |  |
| 783 | bcc(Pr) -> MgPr + dhcp(Pr) | bcc(Pr): Pr 0.8097; MgPr: Pr 0.5274; dhcp(Pr): Pr 0.9279 | model | [3] Guo 2008 | Table 2, p. 5, row 3; `ORC-4HA7OZ4OIH` |  |
| 783 | bcc(Pr) -> MgPr + dhcp(Pr) | bcc(Pr): Pr 0.805; MgPr: Pr 0.508; dhcp(Pr): Pr 0.895 | experimental | [3] Guo 2008; _cites Saccone 2001_ [doi](https://doi.org/10.1016/s0925-8388%2800%2901377-3) | Table 2, p. 5, row 4; `ORC-GQGAKX3LPP` |  |
| 783 | bcc(Pr) -> MgPr + dhcp(Pr) | bcc(Pr): Pr 0.805; MgPr: Pr 0.508; dhcp(Pr): Pr 0.895 | experimental | [2] Guo 2005; _cites Saccone 1993_ [doi](https://doi.org/10.1016/0966-9795%2893%2990010-s) | Table 2, p. 5, row 20; `ORC-LEXJE2Y2H3` |  |
| 783 | bcc(Pr) -> MgPr + dhcp(Pr) | bcc(Pr): Pr 0.8065; MgPr: Pr 0.5226; dhcp(Pr): Pr 0.9135 | model | [2] Guo 2005 | Table 2, p. 5, row 19; `ORC-LGT6B43KGE` |  |
| 782.65 | βPr = PrMg + αPr | PrMg: Mg 0.5, Pr 0.5 | model | [1] Wang 2015 | Table 3, p. 4, row 46; `ORC-PCX5D47WSY` |  |
| 773.15 | βPr = PrMg + αPr | PrMg: Mg 0.5, Pr 0.5 | experimental | [1] Wang 2015; _cites Saccone 1993_ [doi](https://doi.org/10.1016/0966-9795%2893%2990010-s) | Table 3, p. 4, row 42; `ORC-ZBYV5GVHVC` |  |

## 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, Mg–Pr system (5)

| Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote |
|---|---|---:|---:|---|---:|---:|---|---|---|
| PrMg | [MgPr](https://data.orchid-project.org/compounds/MgPr.html) | -12.7 kJ/mol-atom | 298.15 | experimental | -10.891 (mp-aaaaacho) | -11.519 (oqmd-17640) | [4] Hampl 2013; _cites ref. 1967Ogr_ | Table 6, p. 10, row 10; `ORC-42GLYI5YXY.01504e` |  |
| PrMg3 | [Mg3Pr](https://data.orchid-project.org/compounds/Mg3Pr.html) | -11.5 kJ/mol-atom | 298.15 | experimental | -12.164 (mp-aaaaaaqm) | -12.509 (oqmd-17642) | [4] Hampl 2013; _cites ref. 1933Can_ | Table 6, p. 10, row 9; `ORC-5464M6CAS7.1eba46` |  |
| RMg |  | -17.2 kJ/mol-atom | 298.15 | experimental |  |  | [4] Hampl 2013; _cites ref. 1933Can_ | Table 6, p. 10, row 9; `ORC-5464M6CAS7.14e105` |  |
| RMg |  | -12.7 kJ/mol-atom | 298.15 | experimental |  |  | [4] Hampl 2013; _cites ref. 1967Ogr_ | Table 6, p. 10, row 10; `ORC-42GLYI5YXY.9bbd1b` |  |
| RMg3 |  | -11.5 kJ/mol-atom | 298.15 | experimental |  |  | [4] Hampl 2013; _cites ref. 1933Can_ | Table 6, p. 10, row 9; `ORC-5464M6CAS7.547889` |  |

## Other properties

### Phase transition (9)

Table: Phase transition, Mg–Pr system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase transition | 948.15 K | 948.15 | Liquid = (Mg) + PrMg12 | model | [1] Wang 2015; _cites Rokhlin 2003_ | p. 3; `ORC-3YIXS7BMFS` | “For example, the reported liquid composition \[18\] for the invariant reaction Liquid = (Mg) + PrMg12 was extrapolated by the (Mg) liquidus and the invariant reaction temperature, 675 °C, and labeled as 4.64 at.% Pr (22 wt.% Pr) \[18\].” |
| Phase transition | 1038 K | 1038 | liq. -> MgPr; _liq.: Pr 0.4915; MgPr: Pr 0.4915_ | model | [2] Guo 2005 | Table 2, p. 5, row 15; `ORC-2P4AG66UBY` |  |
| Phase transition | 1038 K | 1038 | liq. -> MgPr; _liq.: Pr 0.5; MgPr: Pr 0.5_ | experimental | [2] Guo 2005; _cites Saccone 1993_ [doi](https://doi.org/10.1016/0966-9795%2893%2990010-s) | Table 2, p. 5, row 16; `ORC-6MTH2WHFS5` |  |
| Phase transition | 1038 K | 1038 | liq. -> MgPr; _L: Pr 0.5; MgPr: Pr 0.5_ | experimental | [3] Guo 2008; _cites Saccone 2001_ [doi](https://doi.org/10.1016/s0925-8388%2800%2901377-3) | Table 2, p. 5, row 6; `ORC-MCJSG2CKMS` |  |
| Phase transition | 1038 K | 1038 | liq. -> MgPr; _L: Pr 0.497; MgPr: Pr 0.497_ | model | [3] Guo 2008 | Table 2, p. 5, row 5; `ORC-U4227B4SE3` |  |
| Phase transition | 1063 K | 1063 | liq. -> Mg3Pr; _L: Pr 0.2471; Mg3Pr: Pr 0.2471_ | model | [3] Guo 2008 | Table 2, p. 5, row 11; `ORC-APYWYWO2YE` |  |
| Phase transition | 1063 K | 1063 | liq. -> Mg3Pr; _L: Pr 0.248; Mg3Pr: Pr 0.248_ | experimental | [3] Guo 2008; _cites Saccone 2001_ [doi](https://doi.org/10.1016/s0925-8388%2800%2901377-3) | Table 2, p. 5, row 12; `ORC-CDSMNUHGY4` |  |
| Phase transition | 1063 K | 1063 | liq. -> Mg3Pr; _liq.: Pr 0.2467; Mg3Pr: Pr 0.2467_ | model | [2] Guo 2005 | Table 2, p. 5, row 7; `ORC-D26RLKTRMD` |  |
| Phase transition | 1063 K | 1063 | liq. -> Mg3Pr; _liq.: Pr 0.248; Mg3Pr: Pr 0.248_ | experimental | [2] Guo 2005; _cites Saccone 1993_ [doi](https://doi.org/10.1016/0966-9795%2893%2990010-s) | Table 2, p. 5, row 8; `ORC-DCIP72K3Q6` |  |

### Crystal structure (11)

Table: Crystal structure, Mg–Pr system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Lattice a | 3.2094 Å | 298.15 | Mg; _Mg: Mg 0.99703, Pr 0.00297_ | unspecified | [1] Wang 2015 | Table 1, p. 2, row 1; `ORC-EAA4RP2SWZ.a7f555` |  |
| Lattice a | 1.475 Å | 298.15 | Pr5Mg41; _Pr5Mg41: Mg 0.891, Pr 0.109_ | unspecified | [1] Wang 2015; _cites ref. 1993Sac_ | Table 1, p. 2, row 3; `ORC-A3TCJEWBPM.f39085` |  |
| Lattice a | 3.898 Å | 298.15 | PrMg; _alloy: Pr 0.5_ | unspecified | [1] Wang 2015; _cites ref. 1993Sac_ | Table 1, p. 2, row 6; `ORC-S2KYZBV7AC` |  |
| Lattice a | 3.898 Å | 298.15 | PrMg; _PrMg: Mg 0.47, Pr 0.53_ | unspecified | [1] Wang 2015; _cites ref. 1993Sac_ | Table 1, p. 2, row 13; `ORC-UTP5R5OXAI` |  |
| Lattice a | 10.34 Å | 298.15 | PrMg12; _PrMg12: Mg 0.923, Pr 0.077_ | unspecified | [1] Wang 2015; _cites ref. 1993Sac_ | Table 1, p. 2, row 2; `ORC-EH2FSQFM5H.6173bc` |  |
| Lattice a | 8.689 Å | 298.15 | PrMg2a; _PrMg2a: Mg 0.667, Pr 0.333_ | unspecified | [1] Wang 2015; _cites ref. 1993Sac_ | Table 1, p. 2, row 5; `ORC-NTYVB2W74Y` |  |
| Lattice a | 7.43 Å | 298.15 | PrMg3; _alloy: Pr 0.25_ | unspecified | [1] Wang 2015; _cites ref. 1993Sac_ | Table 1, p. 2, row 4; `ORC-BMPIP3QKMY.d68ba2` |  |
| Lattice c | 5.2107 Å | 298.15 | Mg; _Mg: Mg 0.99703, Pr 0.00297_ | unspecified | [1] Wang 2015 | Table 1, p. 2, row 1; `ORC-EAA4RP2SWZ.444401` |  |
| Lattice c | 1.041 Å | 298.15 | Pr5Mg41; _Pr5Mg41: Mg 0.891, Pr 0.109_ | unspecified | [1] Wang 2015; _cites ref. 1993Sac_ | Table 1, p. 2, row 3; `ORC-A3TCJEWBPM.cd8a24` |  |
| Lattice c | 5.98 Å | 298.15 | PrMg12; _PrMg12: Mg 0.923, Pr 0.077_ | unspecified | [1] Wang 2015; _cites ref. 1993Sac_ | Table 1, p. 2, row 2; `ORC-EH2FSQFM5H.f6f2e1` |  |
| Lattice c | 7.411 Å | 298.15 | PrMg3; _alloy: Pr 0.25_ | unspecified | [1] Wang 2015; _cites ref. 1993Sac_ | Table 1, p. 2, row 4; `ORC-BMPIP3QKMY.5dff60` |  |

## Sources

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

1. Peisheng Wang, Rainer Schmid-Fetzer, Thermodynamic assessment of the Mg–Pr system, Computational Materials Science 104, 138-142 (2015). [doi:10.1016/j.commatsci.2014.11.050](https://doi.org/10.1016/j.commatsci.2014.11.050)
2. Cuiping Guo, Zhenmin Du, Thermodynamic assessment of the Mg–Pr system, Journal of Alloys and Compounds 399, 183-188 (2005). [doi:10.1016/j.jallcom.2005.03.033](https://doi.org/10.1016/j.jallcom.2005.03.033)
3. Cuiping Guo, Zhenmin Du, Changrong Li, A thermodynamic description of the Mg–Pr–Y system, Calphad 32, 177-187 (2008). [doi:10.1016/j.calphad.2007.05.007](https://doi.org/10.1016/j.calphad.2007.05.007)
4. M. Hampl, C. Blawert, M.R. Silva Campos, N. Hort, Q. Peng, K.U. Kainer et al., Thermodynamic assessment and experimental study of Mg–Gd alloys, Journal of Alloys and Compounds 581, 166-177 (2013). [doi:10.1016/j.jallcom.2013.07.042](https://doi.org/10.1016/j.jallcom.2013.07.042)

## 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/).