# Ni–Sc system

> Ni–Sc system: 201 accepted literature values (invariant reaction 91, formation 45, phase transition 29, crystal structure 22) and 3 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

HTML: https://data.orchid-project.org/systems/NI-SC.html · Markdown: https://data.orchid-project.org/systems/NI-SC.md

201 accepted literature values from 4 paper(s) (experimental 94, model 96, unspecified 11); 3 calculated phase diagram(s). 21 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/NI-SC.json) · [CSV](https://data.orchid-project.org/systems/NI-SC.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#NI-SC) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#NI-SC/NiSc-13Kar.json) · [phases (10)](https://data.orchid-project.org/phases/pages/NI-SC.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/NI-SC.html) · [Markdown](https://data.orchid-project.org/systems/NI-SC.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 94 |
| model | 96 |
| unspecified | 11 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 91 |
| phase transition | 29 |
| phase equilibrium | 11 |
| formation | 45 |
| heat capacity / entropy / enthalpy | 3 |
| crystal structure | 22 |

## 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 |
|---|---|---|---|
| NiSc-13Kar.tdb | S. Kardellass, C. Servant, N. Selhaoui, A. Iddaoudi, M. Ait Amar, L. Bouirden, Calphad, 42, 59-65(2013). [doi:10.1016/j.calphad.2013.07.003](https://doi.org/10.1016/j.calphad.2013.07.003) | `49e8d54d4d81024bf4f03f2711f379f7f638cc4bd238e7c82e9347ccdbb733c3` | [viewer](https://orchid-project.org/phase-diagrams/#NI-SC/NiSc-13Kar.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/NiSc-13Kar.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/NiSc-13Kar.json) |
| NiSc-14Cao.tdb | Z. Cao, S. Liu, X. Fang, K. Cheng, Q. Gao, Y. Du, J. Wang, J. Zhang, W. Huang, C. Tang, Thermochim. Acta, 586, 30-39(2014). [doi:10.1016/j.tca.2014.04.006](https://doi.org/10.1016/j.tca.2014.04.006) | `ff80233bcc4a5f5d32fc2d7106b0c1440dd234cfebcbe5c10a6270ee39263663` | [viewer](https://orchid-project.org/phase-diagrams/#NI-SC/NiSc-14Cao.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/NiSc-14Cao.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/NiSc-14Cao.json) |
| NiSc-15Zhu.tdb | D. Zhu, C. Li, C. Guo, Z. Du, J. Li, Calphad, 48, 106-12(2015). [doi:10.1016/j.calphad.2014.11.005](https://doi.org/10.1016/j.calphad.2014.11.005) | `93e76d916a3807e795016b0078bca1a16a3453bd28e44fca7cc69af19f4140bc` | [viewer](https://orchid-project.org/phase-diagrams/#NI-SC/NiSc-15Zhu.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/NiSc-15Zhu.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/NiSc-15Zhu.json) |

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

| TDB file | T (K) | Phases at the invariant |
|---|---:|---|
| NiSc-13Kar.tdb | 1545.87 | NI7SC2 (x(Sc) 0.22222) + LIQUID (x(Sc) 0.25406) + C15_LAVES (x(Sc) 0.29059) |
| NiSc-13Kar.tdb | 1545.87 | NI7SC2 (x(Sc) 0.22222) + LIQUID (x(Sc) 0.25404) + C15_LAVES (x(Sc) 0.29059) |
| NiSc-13Kar.tdb | 1455.72 | LIQUID (x(Sc) 0.14948) + NI5SC_D2D (x(Sc) 0.16667) + NI7SC2 (x(Sc) 0.22222) |
| NiSc-13Kar.tdb | 1455.71 | LIQUID (x(Sc) 0.14934) + NI5SC_D2D (x(Sc) 0.16667) + NI7SC2 (x(Sc) 0.22222) |
| NiSc-13Kar.tdb | 1426.49 | C15_LAVES (x(Sc) 0.32978) + LIQUID (x(Sc) 0.42601) + NISC_B2 (x(Sc) 0.53) |
| NiSc-13Kar.tdb | 1403.33 | FCC_A1 (x(Sc) 0.00284) + LIQUID (x(Sc) 0.11364) + NI5SC_D2D (x(Sc) 0.16667) |
| NiSc-13Kar.tdb | 1403.33 | FCC_A1 (x(Sc) 0.00284) + LIQUID (x(Sc) 0.11364) + NI5SC_D2D (x(Sc) 0.16667) |
| NiSc-13Kar.tdb | 1246.73 | NISC_B2 (x(Sc) 0.53) + LIQUID (x(Sc) 0.71471) + NISC2 (x(Sc) 0.72) |
| NiSc-13Kar.tdb | 1246.73 | NISC_B2 (x(Sc) 0.53) + LIQUID (x(Sc) 0.71453) + NISC2 (x(Sc) 0.72) |
| NiSc-13Kar.tdb | 1228.77 | LIQUID (x(Sc) 0.80528) + BCC_A2 (x(Sc) 0.9482) + HCP_A3 (x(Sc) 0.99998) |
| NiSc-13Kar.tdb | 1166.99 | NISC2 (x(Sc) 0.72) + LIQUID (x(Sc) 0.79544) + HCP_A3 (x(Sc) 0.99999) |
| NiSc-13Kar.tdb | 1166.99 | NISC2 (x(Sc) 0.72) + LIQUID (x(Sc) 0.79543) + HCP_A3 (x(Sc) 0.99999) |
| NiSc-14Cao.tdb | 1607.99 | HCP_A3 (x(Sc) 1) + BCC_A2 (x(Sc) 1) + B2_BCC (x(Sc) 1) |
| NiSc-14Cao.tdb | 1601.06 | BCC_A2 (x(Sc) 0.99873) + B2_BCC (x(Sc) 0.99873) + HCP_A3 (x(Sc) 1) |
| NiSc-14Cao.tdb | 1539.02 | NI7SC2 (x(Sc) 0.22222) + LIQUID (x(Sc) 0.25755) + C15_LAVES (x(Sc) 0.27909) |
| NiSc-14Cao.tdb | 1539.02 | NI7SC2 (x(Sc) 0.22222) + LIQUID (x(Sc) 0.25738) + C15_LAVES (x(Sc) 0.27895) |
| NiSc-14Cao.tdb | 1445.95 | LIQUID (x(Sc) 0.14143) + NI5SC_D2D (x(Sc) 0.16667) + NI7SC2 (x(Sc) 0.22222) |
| NiSc-14Cao.tdb | 1445.95 | LIQUID (x(Sc) 0.1417) + NI5SC_D2D (x(Sc) 0.16667) + NI7SC2 (x(Sc) 0.22222) |
| NiSc-14Cao.tdb | 1399.32 | C15_LAVES (x(Sc) 0.3383) + LIQUID (x(Sc) 0.42086) + B2_BCC (x(Sc) 0.49991) |
| NiSc-14Cao.tdb | 1399.32 | C15_LAVES (x(Sc) 0.3383) + LIQUID (x(Sc) 0.42086) + B2_BCC (x(Sc) 0.49991) |
| NiSc-14Cao.tdb | 1396.59 | FCC_A1 (x(Sc) 0.00706) + LIQUID (x(Sc) 0.10563) + NI5SC_D2D (x(Sc) 0.16667) |
| NiSc-14Cao.tdb | 1396.59 | FCC_A1 (x(Sc) 0.00706) + LIQUID (x(Sc) 0.1056) + NI5SC_D2D (x(Sc) 0.16667) |
| NiSc-14Cao.tdb | 1256.01 | LIQUID (x(Sc) 0.81031) + B2_BCC (x(Sc) 0.95909) + HCP_A3 (x(Sc) 1) |
| NiSc-14Cao.tdb | 1256.01 | LIQUID (x(Sc) 0.81028) + B2_BCC (x(Sc) 0.95908) + HCP_A3 (x(Sc) 1) |
| NiSc-14Cao.tdb | 1256.01 | LIQUID (x(Sc) 0.81031) + BCC_A2 (x(Sc) 0.95909) + HCP_A3 (x(Sc) 1) |
| NiSc-14Cao.tdb | 1127.2 | NISC2 (x(Sc) 0.72) + LIQUID (x(Sc) 0.79094) + HCP_A3 (x(Sc) 1) |
| NiSc-14Cao.tdb | 1127.2 | NISC2 (x(Sc) 0.72) + LIQUID (x(Sc) 0.79091) + HCP_A3 (x(Sc) 1) |
| NiSc-14Cao.tdb | 1127.2 | NISC2 (x(Sc) 0.72) + LIQUID (x(Sc) 0.79098) + HCP_A3 (x(Sc) 1) |
| NiSc-14Cao.tdb | 1113.17 | B2_BCC (x(Sc) 0.52261) + LIQUID (x(Sc) 0.65166) + NISC2 (x(Sc) 0.72) |
| NiSc-15Zhu.tdb | 1509.29 | NI7SC2 (x(Sc) 0.22222) + LIQUID (x(Sc) 0.25734) + C15_LAVES (x(Sc) 0.27964) |
| NiSc-15Zhu.tdb | 1509.29 | NI7SC2 (x(Sc) 0.22222) + LIQUID (x(Sc) 0.25731) + C15_LAVES (x(Sc) 0.27961) |
| NiSc-15Zhu.tdb | 1449.59 | LIQUID (x(Sc) 0.15413) + NI5SC_D2D (x(Sc) 0.16667) + NI7SC2 (x(Sc) 0.22222) |
| NiSc-15Zhu.tdb | 1449.59 | LIQUID (x(Sc) 0.15414) + NI5SC_D2D (x(Sc) 0.16667) + NI7SC2 (x(Sc) 0.22222) |
| NiSc-15Zhu.tdb | 1404.72 | FCC_A1 (x(Sc) 0.00608) + LIQUID (x(Sc) 0.11393) + NI5SC_D2D (x(Sc) 0.16667) |
| NiSc-15Zhu.tdb | 1404.72 | FCC_A1 (x(Sc) 0.00607) + LIQUID (x(Sc) 0.1139) + NI5SC_D2D (x(Sc) 0.16667) |
| NiSc-15Zhu.tdb | 1373.41 | C15_LAVES (x(Sc) 0.3499) + LIQUID (x(Sc) 0.41711) + NISC_B2 (x(Sc) 0.53) |
| NiSc-15Zhu.tdb | 1263.43 | NISC_B2 (x(Sc) 0.53) + NISC2 (x(Sc) 0.72) + LIQUID (x(Sc) 0.72286) |
| NiSc-15Zhu.tdb | 1223.05 | LIQUID (x(Sc) 0.80717) + BCC_A2 (x(Sc) 0.93989) + HCP_A3 (x(Sc) 0.99007) |
| NiSc-15Zhu.tdb | 1112.71 | NISC2 (x(Sc) 0.72) + LIQUID (x(Sc) 0.79209) + HCP_A3 (x(Sc) 0.98996) |
| NiSc-15Zhu.tdb | 1112.71 | NISC2 (x(Sc) 0.72) + LIQUID (x(Sc) 0.79207) + HCP_A3 (x(Sc) 0.98996) |

Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/NI/NI-SC.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/NI/NI-SC.json) · [CALPHAD hull NiSc-13Kar](https://data.orchid-project.org/hulls/calphad-sgte/NI/NI-SC--NiSc-13Kar.json) · [CALPHAD hull NiSc-14Cao](https://data.orchid-project.org/hulls/calphad-sgte/NI/NI-SC--NiSc-14Cao.json)

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Ni–Sc system (91)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 1555.15 | eutectic: Liq -> Ni7Sc2+Ni2Sc | L: Sc 0.247; Ni7Sc2: Sc 0.222222; Ni2Sc: Sc 0.333333 | model | [1] Kardellass 2013 | Table 3, p. 5, row 15; `ORC-EC4C6QYLSG` |  |
| 1548 | eutectic: Liq -> Sc2Ni7 + (ScNi2) | Liq: Sc 0.254; Sc2Ni7: Sc 0.222222; (ScNi2): Sc 0.333333 | model | [2] Zhu 2015; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 1, p. 2, row 16; `ORC-AWQZFUNXYU` |  |
| 1543.15 | eutectic: Liq -> Ni7Sc2+Ni2Sc | L: Sc 0.252; Ni7Sc2: Sc 0.222222; Ni2Sc: Sc 0.333333 | experimental | [1] Kardellass 2013; _cites Nash 1991_ | Table 3, p. 5, row 13; `ORC-ZR7IMXVY7F` |  |
| 1543 | eutectic: Liquid ↔ ScNi2 + Sc2 Ni7 |  | experimental | [3] Cao 2014 | p. 2; `ORC-4VCVB4TDJ5.4d6feb` | “Three eutectic reactions, Liquid ↔ ScNi5 + (Ni) at 1403 K, Liquid ↔ ScNi2 + Sc2 Ni7 at 1543 K and Liquid ↔ ScNi2 + ScNi at 1393 K, were reported.” |
| 1543 | eutectic: Liq -> Sc2Ni7 + (ScNi2) | Liq: Sc 0.25; Sc2Ni7: Sc 0.222222; (ScNi2): Sc 0.333333 | experimental | [2] Zhu 2015; _cites Maslenkov 1984_ | Table 1, p. 2, row 13; `ORC-OTLE6HAXOD` |  |
| 1543 | eutectic: Liquid -> Sc2Ni7 + ScNi2 | Sc2Ni7: Sc 0.2222; ScNi2: Sc 0.28 | experimental | [3] Cao 2014; _cites Semenova 1997_ [doi](https://doi.org/10.1016/s0925-8388%2897%2900467-2) | Table 5, p. 8, row 12; `ORC-RIYL55ZCDZ` |  |
| 1540.15 | eutectic: Liq -> Ni7Sc2+Ni2Sc | L: Sc 0.235; Ni7Sc2: Sc 0.222222; Ni2Sc: Sc 0.333333 | model | [1] Kardellass 2013 | Table 3, p. 5, row 14; `ORC-OGPTJ6YZUP` |  |
| 1539 | eutectic: Liquid -> Sc2Ni7 + ScNi2 | Sc2Ni7: Sc 0.2222; ScNi2: Sc 0.279 | model | [3] Cao 2014 | Table 5, p. 8, row 14; `ORC-YSJACHEX5J` |  |
| 1534 | eutectic: Liq -> Sc2Ni7 + (ScNi2) | Liq: Sc 0.244; Sc2Ni7: Sc 0.222222; (ScNi2): Sc 0.333333 | model | [2] Zhu 2015; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 1, p. 2, row 17; `ORC-L3CH2AHTZK` |  |
| 1533 | eutectic: Liquid -> Sc2Ni7 + ScNi2 | Liquid: Sc 0.25; Sc2Ni7: Sc 0.2222; ScNi2: Sc 0.31 | experimental | [3] Cao 2014; _cites Maslenkov 2014_ | Table 5, p. 8, row 11; `ORC-DCMV46KG62` |  |
| 1532.2 | eutectic: Liquid -> Sc2Ni7 + ScNi2 | Liquid: Sc 0.2575; Sc2Ni7: Sc 0.222; ScNi2: Sc 0.293 | experimental | [3] Cao 2014 | Table 5, p. 8, row 13; `ORC-EDYZNQHBDK` |  |
| 1528 | eutectic: Liq -> Sc2Ni7 + (ScNi2) | Sc2Ni7: Sc 0.222222; (ScNi2): Sc 0.333333 | unspecified | [2] Zhu 2015; _cites Okamoto 2000_ | Table 1, p. 2, row 15; `ORC-256LTEXH5F` |  |
| 1528 | eutectic: Liq -> Sc2Ni7 + (ScNi2) | Sc2Ni7: Sc 0.222222; (ScNi2): Sc 0.333333 | experimental | [2] Zhu 2015; _cites Semenova 1997_ [doi](https://doi.org/10.1016/s0925-8388%2897%2900467-2) | Table 1, p. 2, row 14; `ORC-PPB4WYVTGS` |  |
| 1512 | eutectic: Liq -> Sc2Ni7 + (ScNi2) | Liq: Sc 0.257; Sc2Ni7: Sc 0.222222; (ScNi2): Sc 0.333333 | model | [2] Zhu 2015 | Table 1, p. 2, row 18; `ORC-MANFUNGHO5` |  |
| 1471.15 | Liq+Ni7Sc2 -> Ni5Sc | L: Sc 0.159; Ni7Sc2: Sc 0.222222; Ni5Sc: Sc 0.166667 | model | [1] Kardellass 2013 | Table 3, p. 5, row 8; `ORC-CLEHTJZ5VJ` |  |
| 1471 | peritectic: Liq + Sc2Ni7 -> ScNi5 | Liq: Sc 0.16; Sc2Ni7: Sc 0.222222; ScNi5: Sc 0.166667 | model | [2] Zhu 2015; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 1, p. 2, row 11; `ORC-Y455MREFYV` |  |
| 1453 | peritectic |  | experimental | [3] Cao 2014; _cites Maslenkov 2014_ | p. 2; `ORC-4HK45UZF6W.211ee7` | “ScNi5 melted peritecticly at 1453 K, while Sc2 Ni7 and ScNi2 melted congruently at 1568 K and 1583 K, respectively.” |
| 1453 | Liquid + Sc2Ni7 -> ScNi5 | Liquid: Sc 0.142; Sc2Ni7: Sc 0.2222; ScNi5: Sc 0.1667 | experimental | [3] Cao 2014; _cites Maslenkov 2014_ | Table 5, p. 8, row 5; `ORC-CJCBLBLF4J` |  |
| 1453 | peritectic: Liq + Sc2Ni7 -> ScNi5 | Liq: Sc 0.142; Sc2Ni7: Sc 0.222222; ScNi5: Sc 0.166667 | experimental | [2] Zhu 2015; _cites Maslenkov 1984_ | Table 1, p. 2, row 7; `ORC-CVCMFEVAXV` |  |
| 1450.15 | Liq+Ni7Sc2 -> Ni5Sc | L: Sc 0.147; Ni7Sc2: Sc 0.222222; Ni5Sc: Sc 0.166667 | model | [1] Kardellass 2013 | Table 3, p. 5, row 9; `ORC-RJGVLRRHOU` |  |
| 1450 | peritectic: Liq + Sc2Ni7 -> ScNi5 | Liq: Sc 0.147; Sc2Ni7: Sc 0.222222; ScNi5: Sc 0.166667 | model | [2] Zhu 2015; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 1, p. 2, row 10; `ORC-WW6EO644LA` |  |
| 1446 | Liquid + Sc2Ni7 -> ScNi5 | Sc2Ni7: Sc 0.2222; ScNi5: Sc 0.1667 | model | [3] Cao 2014 | Table 5, p. 8, row 8; `ORC-HMMQXEATYU` |  |
| 1443.15 | Liq+Ni7Sc2 -> Ni5Sc | L: Sc 0.141; Ni7Sc2: Sc 0.222222; Ni5Sc: Sc 0.166667 | experimental | [1] Kardellass 2013; _cites Nash 1991_ | Table 3, p. 5, row 7; `ORC-IPVPF4U3IR` |  |
| 1443 | peritectic: Liq + Sc2Ni7 -> ScNi5 | Sc2Ni7: Sc 0.222222; ScNi5: Sc 0.166667 | unspecified | [2] Zhu 2015; _cites Okamoto 2000_ | Table 1, p. 2, row 9; `ORC-HHH3U5DQZB` |  |
| 1443 | peritectic: Liq + Sc2Ni7 -> ScNi5 | Sc2Ni7: Sc 0.222222; ScNi5: Sc 0.166667 | experimental | [2] Zhu 2015; _cites Semenova 1997_ [doi](https://doi.org/10.1016/s0925-8388%2897%2900467-2) | Table 1, p. 2, row 8; `ORC-IX22WW73KX` |  |
| 1443 | Liquid + Sc2Ni7 -> ScNi5 | Sc2Ni7: Sc 0.222222; ScNi5: Sc 0.1667 | experimental | [3] Cao 2014; _cites Semenova 1997_ [doi](https://doi.org/10.1016/s0925-8388%2897%2900467-2) | Table 5, p. 8, row 6; `ORC-LCH7IDBJPR` |  |
| 1443 | peritectic: Liq + Sc2Ni7 -> ScNi5 | Liq: Sc 0.15; Sc2Ni7: Sc 0.222222; ScNi5: Sc 0.166667 | model | [2] Zhu 2015 | Table 1, p. 2, row 12; `ORC-QXJMDPHBAN` |  |
| 1441 | peritectic |  | experimental | [3] Cao 2014; _cites Ya 1978_ | p. 2; `ORC-A6GHMQ2TM3.1b1c6b` | “According to the work of Markiv et al. \[5\], Sc2 Ni7 , ScNi2 , ScNi and Sc2 Ni formed congruently approximately at 1556 K, 1573 K, 1533 K and 1271 K, respectively, while ScNi5 formed peritecticly at 1441 K.” |
| 1438 | Liquid + Sc2Ni7 -> ScNi5 | Liquid: Sc 0.141; Sc2Ni7: Sc 0.222; ScNi5: Sc 0.168 | experimental | [3] Cao 2014 | Table 5, p. 8, row 7; `ORC-3NILFJ4GLO` |  |
| 1429.15 | eutectic: Liq -> Ni2Sc+NiSc | L: Sc 0.427; Ni2Sc: Sc 0.333333; NiSc: Sc 0.5 | model | [1] Kardellass 2013 | Table 3, p. 5, row 21; `ORC-34DXHCMZQ6` |  |
| 1427 | eutectic: Liq -> (ScNi2) + ScNi | Liq: Sc 0.426; (ScNi2): Sc 0.333333; ScNi: Sc 0.5 | model | [2] Zhu 2015; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 1, p. 2, row 22; `ORC-AUD2H5XQKT` |  |
| 1424.15 | eutectic: Liq -> Ni2Sc+NiSc | L: Sc 0.421; Ni2Sc: Sc 0.333333; NiSc: Sc 0.5 | model | [1] Kardellass 2013 | Table 3, p. 5, row 20; `ORC-HVVKQUCB3P` |  |
| 1422 | eutectic: Liq -> (ScNi2) + ScNi | Liq: Sc 0.42; (ScNi2): Sc 0.333333; ScNi: Sc 0.5 | model | [2] Zhu 2015; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 1, p. 2, row 23; `ORC-Y7XVN3ODUM` |  |
| 1411.15 | eutectic: Liq -> FCC_A1+Ni5Sc | L: Sc 0.113; Ni5Sc: Sc 0.166667 | model | [1] Kardellass 2013 | Table 3, p. 5, row 5; `ORC-CXGDFU5NQY` |  |
| 1411 | eutectic: Liq -> Fcc_A1 + ScNi5 | Liq: Sc 0.113; ScNi5: Sc 0.166667 | model | [2] Zhu 2015; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 1, p. 2, row 5; `ORC-BHWYGY6WME` |  |
| 1403.15 | eutectic: Liq -> FCC_A1+Ni5Sc | L: Sc 0.124; Ni5Sc: Sc 0.166667 | experimental | [1] Kardellass 2013; _cites Nash 1991_ | Table 3, p. 5, row 4; `ORC-WAACGO7CQT` |  |
| 1403 | eutectic: Liquid ↔ ScNi5 + (Ni) |  | experimental | [3] Cao 2014 | p. 2; `ORC-4VCVB4TDJ5.3a5e0d` | “Three eutectic reactions, Liquid ↔ ScNi5 + (Ni) at 1403 K, Liquid ↔ ScNi2 + Sc2 Ni7 at 1543 K and Liquid ↔ ScNi2 + ScNi at 1393 K, were reported.” |
| 1403 | eutectic: Liquid -> (Ni) + ScNi5 | Liquid: Sc 0.125; (Ni): Sc 0.007; ScNi5: Sc 0.1667 | experimental | [3] Cao 2014; _cites Maslenkov 2014_ | Table 5, p. 8, row 1; `ORC-FHNXWWRQGF` |  |
| 1403 | eutectic: Liq -> Fcc_A1 + ScNi5 | Liq: Sc 0.125; ScNi5: Sc 0.166667 | experimental | [2] Zhu 2015; _cites Maslenkov 1984_ | Table 1, p. 2, row 1; `ORC-NZZCXBHUFR` |  |
| 1403 | eutectic: Liq -> Fcc_A1 + ScNi5 | ScNi5: Sc 0.166667 | experimental | [2] Zhu 2015; _cites Semenova 1997_ [doi](https://doi.org/10.1016/s0925-8388%2897%2900467-2) | Table 1, p. 2, row 2; `ORC-S77YDL3356` |  |
| 1403 | eutectic: Liquid -> (Ni) + ScNi5 | ScNi5: Sc 0.1667 | experimental | [3] Cao 2014; _cites Semenova 1997_ [doi](https://doi.org/10.1016/s0925-8388%2897%2900467-2) | Table 5, p. 8, row 2; `ORC-T5Z2FNVWTQ` |  |
| 1403 | eutectic: Liq -> Fcc_A1 + ScNi5 | ScNi5: Sc 0.166667 | unspecified | [2] Zhu 2015; _cites Okamoto 2000_ | Table 1, p. 2, row 3; `ORC-WYSWYDFV4Y` |  |
| 1402.6 | eutectic: Liquid -> (Ni) + ScNi5 | Liquid: Sc 0.1056; (Ni): Sc 0.008; ScNi5: Sc 0.168 | experimental | [3] Cao 2014 | Table 5, p. 8, row 3; `ORC-2DKTBMVIJO` |  |
| 1401.15 | eutectic: Liq -> FCC_A1+Ni5Sc | L: Sc 0.144; Ni5Sc: Sc 0.166667 | model | [1] Kardellass 2013 | Table 3, p. 5, row 6; `ORC-NGZBY24WT6` |  |
| 1401 | eutectic: Liq -> Fcc_A1 + ScNi5 | Liq: Sc 0.114; ScNi5: Sc 0.166667 | model | [2] Zhu 2015; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 1, p. 2, row 4; `ORC-3ZEH5DKQDL` |  |
| 1401 | eutectic: Liq -> Fcc_A1 + ScNi5 | Liq: Sc 0.115; ScNi5: Sc 0.166667 | model | [2] Zhu 2015 | Table 1, p. 2, row 6; `ORC-DVR2MEMANS` |  |
| 1399.3 | eutectic: Liquid -> ScNi2 + ScNi | ScNi2: Sc 0.3383; ScNi: Sc 0.4999 | model | [3] Cao 2014 | Table 5, p. 8, row 20; `ORC-6YA6ZK47XA` |  |
| 1396.6 | eutectic: Liquid -> (Ni) + ScNi5 | (Ni): Sc 0.0071; ScNi5: Sc 0.1667 | model | [3] Cao 2014 | Table 5, p. 8, row 4; `ORC-3NY4KGTEAH` |  |
| 1394.1 | eutectic: Liquid -> ScNi2 + ScNi | Liquid: Sc 0.4209; ScNi2: Sc 0.353; ScNi: Sc 0.5 | experimental | [3] Cao 2014 | Table 5, p. 8, row 19; `ORC-UJXJXL572Y` |  |
| 1393 | eutectic: Liquid ↔ ScNi2 + ScNi |  | experimental | [3] Cao 2014 | p. 2; `ORC-4VCVB4TDJ5.1b4245` | “Three eutectic reactions, Liquid ↔ ScNi5 + (Ni) at 1403 K, Liquid ↔ ScNi2 + Sc2 Ni7 at 1543 K and Liquid ↔ ScNi2 + ScNi at 1393 K, were reported.” |
| 1393 | eutectic: Liquid -> ScNi2 + ScNi | Liquid: Sc 0.4; ScNi2: Sc 0.35; ScNi: Sc 0.5 | experimental | [3] Cao 2014; _cites Maslenkov 2014_ | Table 5, p. 8, row 17; `ORC-E6FZSRVU53` |  |
| 1393 | eutectic: Liq -> (ScNi2) + ScNi | (ScNi2): Sc 0.333333; ScNi: Sc 0.5 | experimental | [2] Zhu 2015; _cites Maslenkov 1984_ | Table 1, p. 2, row 19; `ORC-EBMTXBLLJG` |  |
| 1373.15 | eutectic: Liq -> Ni2Sc+NiSc | L: Sc 0.402; Ni2Sc: Sc 0.333333; NiSc: Sc 0.5 | experimental | [1] Kardellass 2013; _cites Nash 1991_ | Table 3, p. 5, row 19; `ORC-N6DQV2UFWA` |  |
| 1373 | eutectic: Liq -> (ScNi2) + ScNi | Liq: Sc 0.417; (ScNi2): Sc 0.333333; ScNi: Sc 0.5 | model | [2] Zhu 2015 | Table 1, p. 2, row 24; `ORC-6K3QMUIPK4` |  |
| 1373 | eutectic: Liquid -> ScNi2 + ScNi | ScNi2: Sc 0.35; ScNi: Sc 0.53 | experimental | [3] Cao 2014; _cites Semenova 1997_ [doi](https://doi.org/10.1016/s0925-8388%2897%2900467-2) | Table 5, p. 8, row 18; `ORC-75IELB6B64` |  |
| 1373 | eutectic: Liq -> (ScNi2) + ScNi | (ScNi2): Sc 0.333333; ScNi: Sc 0.5 | experimental | [2] Zhu 2015; _cites Semenova 1997_ [doi](https://doi.org/10.1016/s0925-8388%2897%2900467-2) | Table 1, p. 2, row 20; `ORC-CA46VIC4QX` |  |
| 1373 | eutectic: Liq -> (ScNi2) + ScNi | (ScNi2): Sc 0.333333; ScNi: Sc 0.5 | unspecified | [2] Zhu 2015; _cites Okamoto 2000_ | Table 1, p. 2, row 21; `ORC-O7B6MBIZ34` |  |
| 1263.15 | Liq+NiSc -> NiSc2 | L: Sc 0.719; NiSc: Sc 0.5; NiSc2: Sc 0.666667 | experimental | [1] Kardellass 2013; _cites Nash 1991_ | Table 3, p. 5, row 25; `ORC-2NJDJ4JFDT` |  |
| 1263 | peritectic: Liquid + ScNi ↔ Sc2 Ni |  | experimental | [3] Cao 2014; _cites Semenova 1997_ [doi](https://doi.org/10.1016/s0925-8388%2897%2900467-2) | p. 2; `ORC-F3BX3HJDN7` | “In contrast to the former results, Semenova and Rusetskaya \[7\] reported that the homogeneity range of ScNi2 was 28 to 35 at.% Sc and Sc2 Ni was formed via a peritectic reaction Liquid + ScNi ↔ Sc2 Ni at 1263 K.” |
| 1263 | peritectic: Liq + ScNi -> Sc2Ni | ScNi: Sc 0.5; Sc2Ni: Sc 0.666667 | unspecified | [2] Zhu 2015; _cites Okamoto 2000_ | Table 1, p. 2, row 26; `ORC-IY6AJ7GKFE` |  |
| 1263 | peritectic: Liq + ScNi -> Sc2Ni | ScNi: Sc 0.5; Sc2Ni: Sc 0.666667 | experimental | [2] Zhu 2015; _cites Semenova 1997_ [doi](https://doi.org/10.1016/s0925-8388%2897%2900467-2) | Table 1, p. 2, row 25; `ORC-LZGIWVCOPH` |  |
| 1263 | peritectic: Liq + ScNi -> Sc2Ni | Liq: Sc 0.723; ScNi: Sc 0.5; Sc2Ni: Sc 0.666667 | model | [2] Zhu 2015 | Table 1, p. 2, row 29; `ORC-OFZARWBUSU` |  |
| 1258 | (βSc) -> (αSc) + liquid | (αSc): Sc 0.997 | experimental | [3] Cao 2014 | Table 5, p. 8, row 31; `ORC-BUKSHOTM27` |  |
| 1256 | (βSc) -> (αSc) + liquid | (βSc): Sc 0.9591; (αSc): Sc 0.9999; liquid: Sc 0.8103 | model | [3] Cao 2014 | Table 5, p. 8, row 32; `ORC-XVKWCB4KIV` |  |
| 1254.15 | Liq+NiSc -> NiSc2 | L: Sc 0.706; NiSc: Sc 0.5; NiSc2: Sc 0.666667 | model | [1] Kardellass 2013 | Table 3, p. 5, row 26; `ORC-NLSASZMEK5` |  |
| 1254 | peritectic: Liq + ScNi -> Sc2Ni | Liq: Sc 0.719; ScNi: Sc 0.5; Sc2Ni: Sc 0.666667 | model | [2] Zhu 2015; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 1, p. 2, row 28; `ORC-YRE74MSJWP` |  |
| 1247.15 | Liq+NiSc -> NiSc2 | L: Sc 0.715; NiSc: Sc 0.5; NiSc2: Sc 0.666667 | model | [1] Kardellass 2013 | Table 3, p. 5, row 27; `ORC-ZHSJCERLAH` |  |
| 1247 | peritectic: Liq + ScNi -> Sc2Ni | Liq: Sc 0.706; ScNi: Sc 0.5; Sc2Ni: Sc 0.666667 | model | [2] Zhu 2015; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 1, p. 2, row 27; `ORC-BLMMB7O4B3` |  |
| 1229.15 | BCC_A2 -> Liq+HCP_A3 | L: Sc 0.818 | model | [1] Kardellass 2013 | Table 3, p. 5, row 32; `ORC-CVVTV5MNPI` |  |
| 1229.15 | BCC_A2 -> Liq+HCP_A3 | L: Sc 0.805 | model | [1] Kardellass 2013 | Table 3, p. 5, row 33; `ORC-YIBFPMGIZB` |  |
| 1229 | metatectic/catatectic: Bcc_A2 -> Liq + Hcp_A3 | Liq: Sc 0.805 | model | [2] Zhu 2015; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 1, p. 2, row 37; `ORC-ADKQC5H523` |  |
| 1223.15 | BCC_A2 -> Liq+HCP_A3 | L: Sc 0.8 | experimental | [1] Kardellass 2013; _cites Nash 1991_ | Table 3, p. 5, row 31; `ORC-ETR7ZYQCOR` |  |
| 1223 | metatectic/catatectic: Bcc_A2 -> Liq + Hcp_A3 | Liq: Sc 0.8 | unspecified | [2] Zhu 2015; _cites Okamoto 2000_ | Table 1, p. 2, row 36; `ORC-FWMSWQIA3N` |  |
| 1223 | (βSc) -> (αSc) + liquid | liquid: Sc 0.8 | experimental | [3] Cao 2014; _cites Semenova 1997_ [doi](https://doi.org/10.1016/s0925-8388%2897%2900467-2) | Table 5, p. 8, row 30; `ORC-G76PITSHSK` |  |
| 1223 | metatectic/catatectic: Bcc_A2 -> Liq + Hcp_A3 | Liq: Sc 0.807 | model | [2] Zhu 2015 | Table 1, p. 2, row 39; `ORC-GM3KZGZRUW` |  |
| 1223 | metatectic/catatectic: Bcc_A2 -> Liq + Hcp_A3 | Liq: Sc 0.8 | experimental | [2] Zhu 2015; _cites Semenova 1997_ [doi](https://doi.org/10.1016/s0925-8388%2897%2900467-2) | Table 1, p. 2, row 35; `ORC-S3YXJRX662` |  |
| 1191 | metatectic/catatectic: Bcc_A2 -> Liq + Hcp_A3 | Liq: Sc 0.812 | model | [2] Zhu 2015; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 1, p. 2, row 38; `ORC-DLULWZUKUH` |  |
| 1167.15 | eutectic: Liq -> NiSc2+HCP_A3 | L: Sc 0.795; NiSc2: Sc 0.666667 | model | [1] Kardellass 2013 | Table 3, p. 5, row 30; `ORC-KCDBZRCEGH` |  |
| 1167 | eutectic: Liq -> Sc2Ni + Hcp_A3 | Liq: Sc 0.795; Sc2Ni: Sc 0.666667 | model | [2] Zhu 2015; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 1, p. 2, row 32; `ORC-XFAGXQ4ZSC` |  |
| 1139.15 | eutectic: Liq -> NiSc2+HCP_A3 | L: Sc 0.803; NiSc2: Sc 0.666667 | model | [1] Kardellass 2013 | Table 3, p. 5, row 29; `ORC-AFRJVDVG4J` |  |
| 1139 | eutectic: Liq -> Sc2Ni + Hcp_A3 | Liq: Sc 0.803; Sc2Ni: Sc 0.666667 | model | [2] Zhu 2015; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 1, p. 2, row 33; `ORC-VGV666TG3Q` |  |
| 1127.2 | eutectic: Liquid -> Sc2Ni + (αSc) | Liquid: Sc 0.7909; Sc2Ni: Sc 0.72; (αSc): Sc 0.9999 | model | [3] Cao 2014 | Table 5, p. 8, row 29; `ORC-BKN7M74MTJ` |  |
| 1121 | eutectic: Liquid -> Sc2Ni + (αSc) | Liquid: Sc 0.76; Sc2Ni: Sc 0.72; (αSc): Sc 0.997 | experimental | [3] Cao 2014 | Table 5, p. 8, row 28; `ORC-FFVJCPKLZK` |  |
| 1120 | eutectic: Liquid ↔ ScNi + Sc2 Ni |  | experimental | [3] Cao 2014 | p. 9; `ORC-C3ZDX244FP` | “The only invariant reaction between ScNi and Sc2 Ni is eutectic reaction Liquid ↔ ScNi + Sc2 Ni at 1120 K.” |
| 1120 | eutectic: Liquid -> ScNi + Sc2Ni | Liquid: Sc 0.67; ScNi: Sc 0.521; Sc2Ni: Sc 0.72 | experimental | [3] Cao 2014 | Table 5, p. 8, row 23; `ORC-MXHWH7KJDS` |  |
| 1113.3 | eutectic: Liquid -> ScNi + Sc2Ni | Liquid: Sc 0.6517; ScNi: Sc 0.5227; Sc2Ni: Sc 0.72 | model | [3] Cao 2014 | Table 5, p. 8, row 24; `ORC-ZN4M6KW6TL` |  |
| 1113.15 | eutectic: Liq -> NiSc2+HCP_A3 | L: Sc 0.78; NiSc2: Sc 0.666667 | experimental | [1] Kardellass 2013; _cites Nash 1991_ | Table 3, p. 5, row 28; `ORC-MVTXK26TKM` |  |
| 1113 | eutectic: Liq -> Sc2Ni + Hcp_A3 | Liq: Sc 0.83; Sc2Ni: Sc 0.666667 | unspecified | [2] Zhu 2015; _cites Okamoto 2000_ | Table 1, p. 2, row 31; `ORC-3EBZQ3RGXO` |  |
| 1113 | eutectic: Liquid -> Sc2Ni + (αSc) | Liquid: Sc 0.83; Sc2Ni: Sc 0.72; (αSc): Sc 1 | experimental | [3] Cao 2014; _cites Semenova 1997_ [doi](https://doi.org/10.1016/s0925-8388%2897%2900467-2) | Table 5, p. 8, row 27; `ORC-FYKBL3GLOT` |  |
| 1113 | eutectic: Liq -> Sc2Ni + Hcp_A3 | Liq: Sc 0.807; Sc2Ni: Sc 0.666667 | model | [2] Zhu 2015 | Table 1, p. 2, row 34; `ORC-I6JDRWFULU` |  |
| 1113 | eutectic: Liq -> Sc2Ni + Hcp_A3 | Liq: Sc 0.83; Sc2Ni: Sc 0.666667 | experimental | [2] Zhu 2015; _cites Semenova 1997_ [doi](https://doi.org/10.1016/s0925-8388%2897%2900467-2) | Table 1, p. 2, row 30; `ORC-X4MTB3SQAW` |  |

## 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, Ni–Sc system (45)

| Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote |
|---|---|---:|---:|---|---:|---:|---|---|---|
| (ScNi2) | [Ni2Sc](https://data.orchid-project.org/compounds/Ni2Sc.html) | -53 kJ/mol-atom | 298.15 | model | -50.261 (mp-aaaaabgs) | -50.606 (oqmd-17796) | [2] Zhu 2015; _cites F 1988_ | Table 2, p. 3, row 9; `ORC-E3A3K5VMUR` |  |
| (ScNi2) | [Ni2Sc](https://data.orchid-project.org/compounds/Ni2Sc.html) | -43 kJ/mol-atom ± 2.3 | 1473 | experimental | -50.261 (mp-aaaaabgs) | -50.606 (oqmd-17796) | [2] Zhu 2015; _cites Selhaoui 1993_ [doi](https://doi.org/10.1016/0925-8388%2893%2990287-w) | Table 2, p. 3, row 10; `ORC-5CWK34HTUC.8ed34b` |  |
| (ScNi2) | [Ni2Sc](https://data.orchid-project.org/compounds/Ni2Sc.html) | -37.038 kJ/mol-atom | 298.15 | model | -50.261 (mp-aaaaabgs) | -50.606 (oqmd-17796) | [2] Zhu 2015; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 2, p. 3, row 12; `ORC-VYLH3PZZZ7` |  |
| (ScNi2) | [Ni2Sc](https://data.orchid-project.org/compounds/Ni2Sc.html) | -34.996 kJ/mol-atom | 298.15 | model | -50.261 (mp-aaaaabgs) | -50.606 (oqmd-17796) | [2] Zhu 2015; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 2, p. 3, row 11; `ORC-5PWE35EFJX` |  |
| (ScNi2) | [Ni2Sc](https://data.orchid-project.org/compounds/Ni2Sc.html) | -33.099 kJ/mol-atom | 298.15 | model | -50.261 (mp-aaaaabgs) | -50.606 (oqmd-17796) | [2] Zhu 2015 | Table 2, p. 3, row 13; `ORC-EGDT7OBSW6` |  |
| Ni2Sc | [Ni2Sc](https://data.orchid-project.org/compounds/Ni2Sc.html) | -53 kJ/mol-atom | 298.15 | model | -50.261 (mp-aaaaabgs) | -50.606 (oqmd-17796) | [1] Kardellass 2013; _cites F 1988_ | Table 2, p. 3, row 7; `ORC-WGTLQ6VYWH` |  |
| Ni2Sc | [Ni2Sc](https://data.orchid-project.org/compounds/Ni2Sc.html) | -43 kJ/mol-atom ± 2.3 | 1473 | experimental | -50.261 (mp-aaaaabgs) | -50.606 (oqmd-17796) | [1] Kardellass 2013; _cites Selhaoui 1993_ [doi](https://doi.org/10.1016/0925-8388%2893%2990287-w) | Table 2, p. 3, row 8; `ORC-OWVYRFG56R` |  |
| Ni2Sc | [Ni2Sc](https://data.orchid-project.org/compounds/Ni2Sc.html) | -37.038 kJ/mol-atom | 298.15 | model | -50.261 (mp-aaaaabgs) | -50.606 (oqmd-17796) | [1] Kardellass 2013 | Table 2, p. 3, row 10; `ORC-42RFQ4Q5BC` |  |
| Ni2Sc | [Ni2Sc](https://data.orchid-project.org/compounds/Ni2Sc.html) | -34.996 kJ/mol-atom | 298.15 | model | -50.261 (mp-aaaaabgs) | -50.606 (oqmd-17796) | [1] Kardellass 2013 | Table 2, p. 3, row 9; `ORC-LME2MZEPAM` |  |
| Ni2Sc | [Ni2Sc](https://data.orchid-project.org/compounds/Ni2Sc.html) | -33.77 kJ/mol-atom | 298.15 | model | -50.261 (mp-aaaaabgs) | -50.606 (oqmd-17796) | [4] Kardellass 2016; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 4, p. 7, row 11; `ORC-UV5C6HT3TH.9a7a0d` |  |
| Ni5Sc | [Ni5Sc](https://data.orchid-project.org/compounds/Ni5Sc.html) | -29 kJ/mol-atom | 298.15 | model | -27.346 (mp-aaabgmez) | -27.824 (oqmd-17797) | [1] Kardellass 2013; _cites F 1988_ | Table 2, p. 3, row 1; `ORC-DHPK4YDPCE` |  |
| Ni5Sc | [Ni5Sc](https://data.orchid-project.org/compounds/Ni5Sc.html) | -19.6 kJ/mol-atom | 298.15 | model | -27.346 (mp-aaabgmez) | -27.824 (oqmd-17797) | [1] Kardellass 2013 | Table 2, p. 3, row 3; `ORC-KA5GZCZRKW` |  |
| Ni5Sc | [Ni5Sc](https://data.orchid-project.org/compounds/Ni5Sc.html) | -19.126 kJ/mol-atom | 298.15 | model | -27.346 (mp-aaabgmez) | -27.824 (oqmd-17797) | [1] Kardellass 2013 | Table 2, p. 3, row 2; `ORC-INRSDO6QD3` |  |
| Ni5Sc | [Ni5Sc](https://data.orchid-project.org/compounds/Ni5Sc.html) | -17.59 kJ/mol-atom | 298.15 | model | -27.346 (mp-aaabgmez) | -27.824 (oqmd-17797) | [4] Kardellass 2016; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 4, p. 7, row 7; `ORC-AFNC2EO2GD.d0c688` |  |
| Ni7Sc2 | [Ni7Sc2](https://data.orchid-project.org/compounds/Ni7Sc2.html) | -33 kJ/mol-atom | 298.15 | model | -37.558 (mp-aaacqdim) | -39.527 (oqmd-1799157) | [1] Kardellass 2013 | Table 2, p. 3, row 4; `ORC-6X2XF4EHKJ` |  |
| Ni7Sc2 | [Ni7Sc2](https://data.orchid-project.org/compounds/Ni7Sc2.html) | -25.75 kJ/mol-atom | 298.15 | model | -37.558 (mp-aaacqdim) | -39.527 (oqmd-1799157) | [1] Kardellass 2013 | Table 2, p. 3, row 6; `ORC-RVJ54JBE3W` |  |
| Ni7Sc2 | [Ni7Sc2](https://data.orchid-project.org/compounds/Ni7Sc2.html) | -24.45 kJ/mol-atom | 298.15 | model | -37.558 (mp-aaacqdim) | -39.527 (oqmd-1799157) | [1] Kardellass 2013 | Table 2, p. 3, row 5; `ORC-YHF43MP3ET` |  |
| NiSc | [NiSc](https://data.orchid-project.org/compounds/NiSc.html) | -57 kJ/mol-atom | 298.15 | model | -48.935 (mp-aaaaarbd) | -49.771 (oqmd-17795) | [1] Kardellass 2013; _cites F 1988_ | Table 2, p. 3, row 12; `ORC-OWLBLLX6WW` |  |
| NiSc | [NiSc](https://data.orchid-project.org/compounds/NiSc.html) | -56 kJ/mol-atom | 298.15 | model | -48.935 (mp-aaaaarbd) | -49.771 (oqmd-17795) | [1] Kardellass 2013; _cites Miedema_ | Table 2, p. 3, row 11; `ORC-MB3UOI3BBP` |  |
| NiSc | [NiSc](https://data.orchid-project.org/compounds/NiSc.html) | -46.532 kJ/mol-atom | 298.15 | model | -48.935 (mp-aaaaarbd) | -49.771 (oqmd-17795) | [1] Kardellass 2013 | Table 2, p. 3, row 14; `ORC-N7GFJ7U2E6` |  |
| NiSc | [NiSc](https://data.orchid-project.org/compounds/NiSc.html) | -45.809 kJ/mol-atom | 298.15 | model | -48.935 (mp-aaaaarbd) | -49.771 (oqmd-17795) | [1] Kardellass 2013 | Table 2, p. 3, row 15; `ORC-KRXZGR4XZ3` |  |
| NiSc | [NiSc](https://data.orchid-project.org/compounds/NiSc.html) | -45.67 kJ/mol-atom | 298.15 | model | -48.935 (mp-aaaaarbd) | -49.771 (oqmd-17795) | [4] Kardellass 2016; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 4, p. 7, row 15; `ORC-4YW32ACCRR.017f05` |  |
| NiSc | [NiSc](https://data.orchid-project.org/compounds/NiSc.html) | -44.7 kJ/mol-atom ± 2.3 | 1473 | experimental | -48.935 (mp-aaaaarbd) | -49.771 (oqmd-17795) | [1] Kardellass 2013; _cites Selhaoui 1993_ [doi](https://doi.org/10.1016/0925-8388%2893%2990287-w) | Table 2, p. 3, row 13; `ORC-TEJNLXIZH4` |  |
| NiSc2 | [NiSc2](https://data.orchid-project.org/compounds/NiSc2.html) | -41 kJ/mol-atom | 298.15 | model | -34.396 (mp-aaabxjhl) | -36.147 (oqmd-1369418) | [1] Kardellass 2013; _cites F 1988_ | Table 2, p. 3, row 17; `ORC-URP2YHR7EW` |  |
| NiSc2 | [NiSc2](https://data.orchid-project.org/compounds/NiSc2.html) | -27.429 kJ/mol-atom | 298.15 | model | -34.396 (mp-aaabxjhl) | -36.147 (oqmd-1369418) | [1] Kardellass 2013 | Table 2, p. 3, row 18; `ORC-6RAGQTDH2R` |  |
| NiSc2 | [NiSc2](https://data.orchid-project.org/compounds/NiSc2.html) | -26.5 kJ/mol-atom | 298.15 | model | -34.396 (mp-aaabxjhl) | -36.147 (oqmd-1369418) | [1] Kardellass 2013 | Table 2, p. 3, row 19; `ORC-75UNXMBK5U` |  |
| NiSc2 | [NiSc2](https://data.orchid-project.org/compounds/NiSc2.html) | -20 kJ/mol-atom | 298.15 | experimental | -34.396 (mp-aaabxjhl) | -36.147 (oqmd-1369418) | [1] Kardellass 2013; _cites Semenova 1997_ [doi](https://doi.org/10.1016/s0925-8388%2897%2900467-2) | Table 2, p. 3, row 20; `ORC-G4FXYKGDFO` |  |
| Sc2Ni | [NiSc2](https://data.orchid-project.org/compounds/NiSc2.html) | -41 kJ/mol-atom | 298.15 | model | -34.396 (mp-aaabxjhl) | -36.147 (oqmd-1369418) | [2] Zhu 2015; _cites F 1988_ | Table 2, p. 3, row 20; `ORC-UEYR4TDINZ` |  |
| Sc2Ni | [NiSc2](https://data.orchid-project.org/compounds/NiSc2.html) | -26.817 kJ/mol-atom | 298.15 | model | -34.396 (mp-aaabxjhl) | -36.147 (oqmd-1369418) | [2] Zhu 2015; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 2, p. 3, row 21; `ORC-K2FNO4L6GZ` |  |
| Sc2Ni | [NiSc2](https://data.orchid-project.org/compounds/NiSc2.html) | -25.888 kJ/mol-atom | 298.15 | model | -34.396 (mp-aaabxjhl) | -36.147 (oqmd-1369418) | [2] Zhu 2015; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 2, p. 3, row 22; `ORC-YU5EUIDIP5` |  |
| Sc2Ni | [NiSc2](https://data.orchid-project.org/compounds/NiSc2.html) | -24.976 kJ/mol-atom | 298.15 | model | -34.396 (mp-aaabxjhl) | -36.147 (oqmd-1369418) | [2] Zhu 2015 | Table 2, p. 3, row 23; `ORC-KGGTNPAH4C` |  |
| Sc2Ni | [NiSc2](https://data.orchid-project.org/compounds/NiSc2.html) | -20 kJ/mol-atom | 298.15 | experimental | -34.396 (mp-aaabxjhl) | -36.147 (oqmd-1369418) | [2] Zhu 2015; _cites Semenova 1997_ [doi](https://doi.org/10.1016/s0925-8388%2897%2900467-2) | Table 2, p. 3, row 19; `ORC-JKJIPZOKQZ` |  |
| Sc2Ni7 | [Ni7Sc2](https://data.orchid-project.org/compounds/Ni7Sc2.html) | -33 kJ/mol-atom | 298.15 | model | -37.558 (mp-aaacqdim) | -39.527 (oqmd-1799157) | [2] Zhu 2015; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 2, p. 3, row 5; `ORC-JQHZES3A5L` |  |
| Sc2Ni7 | [Ni7Sc2](https://data.orchid-project.org/compounds/Ni7Sc2.html) | -27.129 kJ/mol-atom | 298.15 | model | -37.558 (mp-aaacqdim) | -39.527 (oqmd-1799157) | [2] Zhu 2015 | Table 2, p. 3, row 8; `ORC-E4XZA626BF` |  |
| Sc2Ni7 | [Ni7Sc2](https://data.orchid-project.org/compounds/Ni7Sc2.html) | -24.319 kJ/mol-atom | 298.15 | model | -37.558 (mp-aaacqdim) | -39.527 (oqmd-1799157) | [2] Zhu 2015; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 2, p. 3, row 7; `ORC-52JZHLHQYZ` |  |
| Sc2Ni7 | [Ni7Sc2](https://data.orchid-project.org/compounds/Ni7Sc2.html) | -23.019 kJ/mol-atom | 298.15 | model | -37.558 (mp-aaacqdim) | -39.527 (oqmd-1799157) | [2] Zhu 2015; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 2, p. 3, row 6; `ORC-PXT3CD3SBO` |  |
| ScNi | [NiSc](https://data.orchid-project.org/compounds/NiSc.html) | -57 kJ/mol-atom | 298.15 | model | -48.935 (mp-aaaaarbd) | -49.771 (oqmd-17795) | [2] Zhu 2015; _cites F 1988_ | Table 2, p. 3, row 14; `ORC-GH34TDRRSG` |  |
| ScNi | [NiSc](https://data.orchid-project.org/compounds/NiSc.html) | -46.525 kJ/mol-atom | 298.15 | model | -48.935 (mp-aaaaarbd) | -49.771 (oqmd-17795) | [2] Zhu 2015; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 2, p. 3, row 16; `ORC-T5CSM3YHCE` |  |
| ScNi | [NiSc](https://data.orchid-project.org/compounds/NiSc.html) | -45.802 kJ/mol-atom | 298.15 | model | -48.935 (mp-aaaaarbd) | -49.771 (oqmd-17795) | [2] Zhu 2015; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 2, p. 3, row 17; `ORC-LDGZFSD3Z2` |  |
| ScNi | [NiSc](https://data.orchid-project.org/compounds/NiSc.html) | -44.7 kJ/mol-atom ± 2.3 | 1473 | experimental | -48.935 (mp-aaaaarbd) | -49.771 (oqmd-17795) | [2] Zhu 2015; _cites Selhaoui 1993_ [doi](https://doi.org/10.1016/0925-8388%2893%2990287-w) | Table 2, p. 3, row 15; `ORC-CFKKFJWLEZ.044e9f` |  |
| ScNi | [NiSc](https://data.orchid-project.org/compounds/NiSc.html) | -41.992 kJ/mol-atom | 298.15 | model | -48.935 (mp-aaaaarbd) | -49.771 (oqmd-17795) | [2] Zhu 2015 | Table 2, p. 3, row 18; `ORC-O3EIOQGIFV` |  |
| ScNi5 | [Ni5Sc](https://data.orchid-project.org/compounds/Ni5Sc.html) | -29 kJ/mol-atom | 298.15 | model | -27.346 (mp-aaabgmez) | -27.824 (oqmd-17797) | [2] Zhu 2015; _cites F 1988_ | Table 2, p. 3, row 1; `ORC-BK4KY6MHPZ` |  |
| ScNi5 | [Ni5Sc](https://data.orchid-project.org/compounds/Ni5Sc.html) | -20.614 kJ/mol-atom | 298.15 | model | -27.346 (mp-aaabgmez) | -27.824 (oqmd-17797) | [2] Zhu 2015 | Table 2, p. 3, row 4; `ORC-L77DXQBRRR` |  |
| ScNi5 | [Ni5Sc](https://data.orchid-project.org/compounds/Ni5Sc.html) | -18.068 kJ/mol-atom | 298.15 | model | -27.346 (mp-aaabgmez) | -27.824 (oqmd-17797) | [2] Zhu 2015; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 2, p. 3, row 3; `ORC-F23W55EJSX` |  |
| ScNi5 | [Ni5Sc](https://data.orchid-project.org/compounds/Ni5Sc.html) | -17.594 kJ/mol-atom | 298.15 | model | -27.346 (mp-aaabgmez) | -27.824 (oqmd-17797) | [2] Zhu 2015; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 2, p. 3, row 2; `ORC-3Q4K5H25TX` |  |

## Other properties

### Phase transition (29)

Table: Phase transition, Ni–Sc system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase transition | 1153 K | 1153 | polymorphic | experimental | [3] Cao 2014; _cites Braslayskaya 1987_ | p. 2; `ORC-IZOQ3VS4P7` | “Braslavskaya and Maslenkov \[11\] reported an allotropic transformation of ScNi5 at 1153 ± 20 K.” |
| Phase transition | 1236.5 K | 1236.5 | Sc2Ni -> liquid; _Sc2Ni: Sc 0.72; liquid: Sc 0.72_ | model | [3] Cao 2014 | Table 5, p. 8, row 26; `ORC-7EZGBRYRTQ` |  |
| Phase transition | 1243 K | 1243 | Sc2Ni | experimental | [3] Cao 2014 | p. 7; `ORC-2B4RVAXVIZ` | “The melting temperature of Sc2 Ni is determined to be 1243 K.” |
| Phase transition | 1243 K | 1243 | Sc2Ni -> liquid; _Sc2Ni: Sc 0.72; liquid: Sc 0.72_ | experimental | [3] Cao 2014 | Table 5, p. 8, row 25; `ORC-XMHV4TLSVA` |  |
| Phase transition | 1271 K | 1271 | congruent transformation | experimental | [3] Cao 2014; _cites Ya 1978_ | p. 2; `ORC-A6GHMQ2TM3.5f5375` | “According to the work of Markiv et al. \[5\], Sc2 Ni7 , ScNi2 , ScNi and Sc2 Ni formed congruently approximately at 1556 K, 1573 K, 1533 K and 1271 K, respectively, while ScNi5 formed peritecticly at 1441 K.” |
| Phase transition | 1518.15 K | 1518.15 | Liq -> NiSc; _L: Sc 0.53; NiSc: Sc 0.5_ | model | [1] Kardellass 2013 | Table 3, p. 5, row 24; `ORC-TA6BDCUONV` |  |
| Phase transition | 1532.15 K | 1532.15 | Liq -> NiSc; _L: Sc 0.53; NiSc: Sc 0.5_ | model | [1] Kardellass 2013 | Table 3, p. 5, row 23; `ORC-XUIQF5RAH2` |  |
| Phase transition | 1533 K | 1533 | congruent transformation | experimental | [3] Cao 2014; _cites Ya 1978_ | p. 2; `ORC-A6GHMQ2TM3.a67af0` | “According to the work of Markiv et al. \[5\], Sc2 Ni7 , ScNi2 , ScNi and Sc2 Ni formed congruently approximately at 1556 K, 1573 K, 1533 K and 1271 K, respectively, while ScNi5 formed peritecticly at 1441 K.” |
| Phase transition | 1537.7 K | 1537.7 | ScNi -> liquid; _ScNi: Sc 0.5; liquid: Sc 0.5_ | model | [3] Cao 2014 | Table 5, p. 8, row 22; `ORC-CKHOKC34GE` |  |
| Phase transition | 1542.15 K | 1542.15 | Liq -> Ni7Sc2; _L: Sc 0.222; Ni7Sc2: Sc 0.222222_ | model | [1] Kardellass 2013 | Table 3, p. 5, row 11; `ORC-TTE2E2TNLV` |  |
| Phase transition | 1543 K | 1543 | ScNi -> liquid; _ScNi: Sc 0.53; liquid: Sc 0.53_ | experimental | [3] Cao 2014; _cites Semenova 1997_ [doi](https://doi.org/10.1016/s0925-8388%2897%2900467-2) | Table 5, p. 8, row 21; `ORC-636VTJ54MF` |  |
| Phase transition | 1543.15 K | 1543.15 | Liq -> Ni7Sc2; _L: Sc 0.222; Ni7Sc2: Sc 0.222222_ | experimental | [1] Kardellass 2013; _cites Nash 1991_ | Table 3, p. 5, row 10; `ORC-W227AYZEDA` |  |
| Phase transition | 1543.15 K | 1543.15 | Liq -> NiSc; _L: Sc 0.53; NiSc: Sc 0.5_ | experimental | [1] Kardellass 2013; _cites Nash 1991_ | Table 3, p. 5, row 22; `ORC-HF2DYN7KIJ` |  |
| Phase transition | 1556 K | 1556 | congruent transformation | experimental | [3] Cao 2014; _cites Ya 1978_ | p. 2; `ORC-A6GHMQ2TM3.ff58ff` | “According to the work of Markiv et al. \[5\], Sc2 Ni7 , ScNi2 , ScNi and Sc2 Ni formed congruently approximately at 1556 K, 1573 K, 1533 K and 1271 K, respectively, while ScNi5 formed peritecticly at 1441 K.” |
| Phase transition | 1562 K | 1562 | Sc2Ni7 -> liquid; _Sc2Ni7: Sc 0.2222; liquid: Sc 0.2222_ | model | [3] Cao 2014 | Table 5, p. 8, row 10; `ORC-BNQLXBC4VR` |  |
| Phase transition | 1563.15 K | 1563.15 | Liq -> Ni7Sc2; _L: Sc 0.222; Ni7Sc2: Sc 0.222222_ | model | [1] Kardellass 2013 | Table 3, p. 5, row 12; `ORC-XYYSOOVMTQ` |  |
| Phase transition | 1568 K | 1568 | Sc2Ni7 -> liquid; _Sc2Ni7: Sc 0.2222; liquid: Sc 0.2222_ | experimental | [3] Cao 2014; _cites Maslenkov 2014_ | Table 5, p. 8, row 9; `ORC-PGDVHP62NF` |  |
| Phase transition | 1568 K | 1568 | congruent transformation | experimental | [3] Cao 2014; _cites Maslenkov 2014_ | p. 2; `ORC-4HK45UZF6W.f03d96` | “ScNi5 melted peritecticly at 1453 K, while Sc2 Ni7 and ScNi2 melted congruently at 1568 K and 1583 K, respectively.” |
| Phase transition | 1573 K | 1573 | congruent transformation | experimental | [3] Cao 2014; _cites Ya 1978_ | p. 2; `ORC-A6GHMQ2TM3.db8261` | “According to the work of Markiv et al. \[5\], Sc2 Ni7 , ScNi2 , ScNi and Sc2 Ni formed congruently approximately at 1556 K, 1573 K, 1533 K and 1271 K, respectively, while ScNi5 formed peritecticly at 1441 K.” |
| Phase transition | 1573.15 K | 1573.15 | Liq -> Ni2Sc; _L: Sc 0.33; Ni2Sc: Sc 0.333333_ | model | [1] Kardellass 2013 | Table 3, p. 5, row 17; `ORC-JVQSDOPJMS` |  |
| Phase transition | 1576.6 K | 1576.6 | ScNi2 -> liquid; _ScNi2: Sc 0.3333; liquid: Sc 0.3333_ | model | [3] Cao 2014 | Table 5, p. 8, row 16; `ORC-4GAP473GFF` |  |
| Phase transition | 1583 K | 1583 | ScNi2 -> liquid; _ScNi2: Sc 0.3333; liquid: Sc 0.3333_ | experimental | [3] Cao 2014; _cites Maslenkov 2014_ | Table 5, p. 8, row 15; `ORC-IZM4PJLAYC` |  |
| Phase transition | 1583 K | 1583 | congruent transformation | experimental | [3] Cao 2014; _cites Maslenkov 2014_ | p. 2; `ORC-4HK45UZF6W.9cd7d3` | “ScNi5 melted peritecticly at 1453 K, while Sc2 Ni7 and ScNi2 melted congruently at 1568 K and 1583 K, respectively.” |
| Phase transition | 1590.15 K | 1590.15 | Liq -> Ni2Sc; _L: Sc 0.33; Ni2Sc: Sc 0.333333_ | model | [1] Kardellass 2013 | Table 3, p. 5, row 18; `ORC-3HTESGS5YF` |  |
| Phase transition | 1603.15 K | 1603.15 | Liq -> Ni2Sc; _L: Sc 0.32; Ni2Sc: Sc 0.333333_ | experimental | [1] Kardellass 2013; _cites Nash 1991_ | Table 3, p. 5, row 16; `ORC-BYP5SGE2NT` |  |
| Phase transition | 1728.15 K | 1728.15 | Liq -> FCC_A1; _L: Sc 0_ | model | [1] Kardellass 2013 | Table 3, p. 5, row 2; `ORC-AWY7JS4RXR` |  |
| Phase transition | 1728.15 K | 1728.15 | Liq -> FCC_A1; _L: Sc 0_ | experimental | [1] Kardellass 2013; _cites Nash 1991_ | Table 3, p. 5, row 1; `ORC-H4QTAWBHLQ` |  |
| Phase transition | 1814.15 K | 1814.15 | Liq -> BCC_A2; _L: Sc 1_ | experimental | [1] Kardellass 2013; _cites Nash 1991_ | Table 3, p. 5, row 34; `ORC-2PJWJAY25V` |  |
| Phase transition | 1814.15 K | 1814.15 | Liq -> BCC_A2; _L: Sc 1_ | model | [1] Kardellass 2013 | Table 3, p. 5, row 35; `ORC-BNP7YXNLP7` |  |

### Phase equilibrium (11)

Table: Phase equilibrium, Ni–Sc system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase assemblage |  | 1053 | (Ni) + ScNi5; _alloy: Ni 0.88, Sc 0.12_ | experimental | [3] Cao 2014 | Table 3, p. 3, row 1; `ORC-TBVNLVUBK3` |  |
| Phase assemblage |  | 1053 | Sc2Ni; _alloy: Ni 0.28, Sc 0.72_ | experimental | [3] Cao 2014 | Table 3, p. 3, row 9; `ORC-DSEJWGG52N` |  |
| Phase assemblage |  | 1053 | Sc2Ni + (αSc); _alloy: Ni 0.25, Sc 0.75_ | experimental | [3] Cao 2014 | Table 3, p. 3, row 10; `ORC-IFX2UI6AWB` |  |
| Phase assemblage |  | 1053 | Sc2Ni + (αSc); _alloy: Ni 0.16, Sc 0.84_ | experimental | [3] Cao 2014 | Table 3, p. 3, row 11; `ORC-SSREVRP4J7` |  |
| Phase assemblage |  | 1053 | ScNi + Sc2Ni; _alloy: Ni 0.34, Sc 0.66_ | experimental | [3] Cao 2014 | Table 3, p. 3, row 8; `ORC-FQ74LAVSWI` |  |
| Phase assemblage |  | 1053 | ScNi + Sc2Ni; _alloy: Ni 0.4, Sc 0.6_ | experimental | [3] Cao 2014 | Table 3, p. 3, row 7; `ORC-UUV6X7HAQN` |  |
| Phase assemblage |  | 1053 | ScNi5 + Sc2Ni7; _alloy: Ni 0.81, Sc 0.19_ | experimental | [3] Cao 2014 | Table 3, p. 3, row 2; `ORC-ZZ3MN5FMU5` |  |
| Phase assemblage |  | 1173 | ScNi; _alloy: Ni 0.5, Sc 0.5_ | experimental | [3] Cao 2014 | Table 3, p. 3, row 5; `ORC-35F7GIIVPP` |  |
| Phase assemblage |  | 1173 | ScNi + Sc2Ni; _alloy: Ni 0.42, Sc 0.58_ | experimental | [3] Cao 2014 | Table 3, p. 3, row 6; `ORC-7Y2D4OPXNZ` |  |
| Phase assemblage |  | 1273 | Sc2Ni7 + ScNi2; _alloy: Ni 0.75, Sc 0.25_ | experimental | [3] Cao 2014 | Table 3, p. 3, row 3; `ORC-RIG25FHFDY` |  |
| Phase assemblage |  | 1273 | ScNi2 + ScNi; _alloy: Ni 0.55, Sc 0.45_ | experimental | [3] Cao 2014 | Table 3, p. 3, row 4; `ORC-YYNTJF7N4T` |  |

### Heat capacity / entropy / enthalpy (3)

Table: Heat capacity / entropy / enthalpy, Ni–Sc system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Entropy; _printed: Entropies of formation_ | 29.38 J/mol-atom/K | 298.15 | Ni2Sc; _alloy: Ni 0.666667, Sc 0.333333_ | model | [4] Kardellass 2016; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 4, p. 7, row 11; `ORC-UV5C6HT3TH.a655f5` |  |
| Entropy; _printed: Entropies of formation_ | 32.52 J/mol-atom/K | 298.15 | Ni5Sc; _alloy: Ni 0.833333, Sc 0.166667_ | model | [4] Kardellass 2016; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 4, p. 7, row 7; `ORC-AFNC2EO2GD.d7b4c8` |  |
| Entropy; _printed: Entropies of formation_ | 23.12 J/mol-atom/K | 298.15 | NiSc; _alloy: Ni 0.5, Sc 0.5_ | model | [4] Kardellass 2016; _cites Kardellass 2013_ [doi](https://doi.org/10.1016/j.calphad.2013.07.003) | Table 4, p. 7, row 15; `ORC-4YW32ACCRR.19728b` |  |

### Crystal structure (22)

Table: Crystal structure, Ni–Sc system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Lattice a | 3.51 Å | 298.15 | (Ni); _(Ni): Ni 0.993, Sc 0.007_ | unspecified | [3] Cao 2014; _cites Maslenkov 2014_ | Table 2, p. 3, row 22; `ORC-VGZEF5FMDZ` |  |
| Lattice a | 12.12 Å | 298.15 | Sc2Ni; _alloy: Sc 0.666667_ | experimental | [3] Cao 2014; _cites Aldred 1962_ | Table 2, p. 3, row 20; `ORC-4YS3JGEDHH` |  |
| Lattice a | 12.17 Å | 298.15 | Sc2Ni; _Sc2Ni: Ni 0.28, Sc 0.72_ | experimental | [3] Cao 2014; _cites Semenova 1997_ [doi](https://doi.org/10.1016/s0925-8388%2897%2900467-2) | Table 2, p. 3, row 19; `ORC-N4PC6HICJ7` |  |
| Lattice a | 4.74 Å | 298.15 | Sc2Ni7; _alloy: Sc 0.222222_ | experimental | [3] Cao 2014; _cites Goebel 1968_ [doi](https://doi.org/10.1016/0022-5088%2868%2990142-2) | Table 2, p. 3, row 10; `ORC-3SGMHA65IN.db0346` |  |
| Lattice a | 4.75 Å | 298.15 | Sc2Ni7; _Sc2Ni7: Ni 0.7778, Sc 0.2222_ | experimental | [3] Cao 2014; _cites Semenova 1997_ [doi](https://doi.org/10.1016/s0925-8388%2897%2900467-2) | Table 2, p. 3, row 9; `ORC-ZVMJREIEZ3.199884` |  |
| Lattice a | 3.171 Å | 298.15 | ScNi; _alloy: Sc 0.5_ | experimental | [3] Cao 2014; _cites Aldred 1962_ | Table 2, p. 3, row 16; `ORC-NIZGEVGHYM` |  |
| Lattice a | 3.171 Å | 298.15 | ScNi; _ScNi: Ni 0.47, Sc 0.53_ | experimental | [3] Cao 2014; _cites Semenova 1997_ [doi](https://doi.org/10.1016/s0925-8388%2897%2900467-2) | Table 2, p. 3, row 15; `ORC-YTPEUKJNOX` |  |
| Lattice a | 6.92 Å | 298.15 | ScNi2 | experimental | [3] Cao 2014; _cites Semenova 1997_ [doi](https://doi.org/10.1016/s0925-8388%2897%2900467-2) | Table 2, p. 3, row 13; `ORC-6HEEFLNZ5K` |  |
| Lattice a | 6.906 Å | 298.15 | ScNi2 | unspecified | [3] Cao 2014; _cites Maslenkov 2014_ | Table 2, p. 3, row 12; `ORC-QILO3J3XZD` |  |
| Lattice a | 4.69 Å | 298.15 | ScNi5; _alloy: Sc 0.166667_ | unspecified | [3] Cao 2014; _cites Braslayskaya 1987_ | Table 2, p. 3, row 7; `ORC-D75A6BUXGH.d1cbe1` |  |
| Lattice a | 4.745 Å | 298.15 | ScNi5; _ScNi5: Ni 0.8333, Sc 0.1667_ | experimental | [3] Cao 2014; _cites Semenova 1997_ [doi](https://doi.org/10.1016/s0925-8388%2897%2900467-2) | Table 2, p. 3, row 5; `ORC-F3HYO2B66C.0b89e7` |  |
| Lattice a | 4.74 Å | 298.15 | ScNi5; _alloy: Sc 0.166667_ | experimental | [3] Cao 2014; _cites Goebel 1968_ [doi](https://doi.org/10.1016/0022-5088%2868%2990142-2) | Table 2, p. 3, row 6; `ORC-IQF7DYCREI.575d82` |  |
| Lattice a | 3.292 Å ± 0.007 | 1053 | (αSc); _(αSc): Ni 0.003, Sc 0.997; (ɑSc): Ni 0.003, Sc 0.997_ | experimental | [3] Cao 2014 | Table 2, p. 3, row 3; `ORC-LC6UQ3ZZH4.939014` |  |
| Lattice a | 12.18 Å ± 0.03 | 1053 | Sc2Ni; _Sc2Ni: Ni 0.28, Sc 0.72_ | experimental | [3] Cao 2014 | Table 2, p. 3, row 21; `ORC-PNCJ5K4JVS` |  |
| Lattice a | 3.1718 Å ± 1.000e-4 | 1273 | ScNi; _ScNi: Ni 0.5, Sc 0.5_ | experimental | [3] Cao 2014 | Table 2, p. 3, row 17; `ORC-25MS737GYC` |  |
| Lattice a | 6.938 Å ± 0.003 | 1273 | ScNi2 | experimental | [3] Cao 2014 | Table 2, p. 3, row 14; `ORC-67OUDEKHIT` |  |
| Lattice c | 22.56 Å | 298.15 | Sc2Ni7; _alloy: Sc 0.222222_ | experimental | [3] Cao 2014; _cites Goebel 1968_ [doi](https://doi.org/10.1016/0022-5088%2868%2990142-2) | Table 2, p. 3, row 10; `ORC-3SGMHA65IN.c9e171` |  |
| Lattice c | 22.72 Å | 298.15 | Sc2Ni7; _Sc2Ni7: Ni 0.7778, Sc 0.2222_ | experimental | [3] Cao 2014; _cites Semenova 1997_ [doi](https://doi.org/10.1016/s0925-8388%2897%2900467-2) | Table 2, p. 3, row 9; `ORC-ZVMJREIEZ3.80ebfb` |  |
| Lattice c | 3.887 Å | 298.15 | ScNi5; _alloy: Sc 0.166667_ | unspecified | [3] Cao 2014; _cites Braslayskaya 1987_ | Table 2, p. 3, row 7; `ORC-D75A6BUXGH.e463e4` |  |
| Lattice c | 3.75 Å | 298.15 | ScNi5; _ScNi5: Ni 0.8333, Sc 0.1667_ | experimental | [3] Cao 2014; _cites Semenova 1997_ [doi](https://doi.org/10.1016/s0925-8388%2897%2900467-2) | Table 2, p. 3, row 5; `ORC-F3HYO2B66C.779717` |  |
| Lattice c | 3.76 Å | 298.15 | ScNi5; _alloy: Sc 0.166667_ | experimental | [3] Cao 2014; _cites Goebel 1968_ [doi](https://doi.org/10.1016/0022-5088%2868%2990142-2) | Table 2, p. 3, row 6; `ORC-IQF7DYCREI.5c6893` |  |
| Lattice c | 5.222 Å ± 0.007 | 1053 | (αSc); _(αSc): Ni 0.003, Sc 0.997; (ɑSc): Ni 0.003, Sc 0.997_ | experimental | [3] Cao 2014 | Table 2, p. 3, row 3; `ORC-LC6UQ3ZZH4.1cec23` |  |

## Sources

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

1. S. Kardellass, C. Servant, N. Selhaoui, A. Iddaoudi, M. Ait Amar, L. Bouirden, Thermodynamic description of the Ni–Sc system, Calphad 42, 59-65 (2013). [doi:10.1016/j.calphad.2013.07.003](https://doi.org/10.1016/j.calphad.2013.07.003)
2. Daiman Zhu, Changrong Li, Cuiping Guo, Zhenmin Du, Junqin Li, Thermodynamic assessment of the Ni–Sc binary system, Calphad 48, 106-112 (2015). [doi:10.1016/j.calphad.2014.11.005](https://doi.org/10.1016/j.calphad.2014.11.005)
3. Zhaoping Cao, Shuhong Liu, Xu Fang, Kaiming Cheng, Qiannan Gao, Yong Du et al., Experimental investigation and thermodynamic analysis of the Sc–Ni system supplemented with first-principles calculations, Thermochimica Acta 586, 30-39 (2014). [doi:10.1016/j.tca.2014.04.006](https://doi.org/10.1016/j.tca.2014.04.006)
4. Saïd Kardellass, Colette Servant, Najim Selhaoui, Thermodynamic description of the Ni–Yb and Ni–Eu binary systems, J Therm Anal Calorim 125, 255-269 (2016). [doi:10.1007/s10973-016-5380-3](https://doi.org/10.1007/s10973-016-5380-3)

## 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/).