# Ru–Si system

> Ru–Si system: 98 accepted literature values (invariant reaction 57, formation 40, phase transition 1) and 4 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

HTML: https://data.orchid-project.org/systems/RU-SI.html · Markdown: https://data.orchid-project.org/systems/RU-SI.md

98 accepted literature values from 2 paper(s) (experimental 36, model 56, unspecified 6); 4 calculated phase diagram(s). 13 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/RU-SI.json) · [CSV](https://data.orchid-project.org/systems/RU-SI.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#RU-SI) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#RU-SI/RuSi-01Du-LB.json) · [phases (10)](https://data.orchid-project.org/phases/pages/RU-SI.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/RU-SI.html) · [Markdown](https://data.orchid-project.org/systems/RU-SI.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 36 |
| model | 56 |
| unspecified | 6 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 57 |
| phase transition | 1 |
| formation | 40 |

## 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 |
|---|---|---|---|
| RuSi-01Du-LB.tdb | Y. Du, K.H. Chen, J.C. Schuster, L. Perring, B.Y. Huang, Z.H. Yuan, J.C. Gachon, Z. Metallkd., 92, 323-27(2001). [doi:10.3139/ijmr-2001-0064](https://doi.org/10.3139/ijmr-2001-0064) | `52402724aa676957b22d61abc505f902822c7c759e0dcdc10ae6bf4e41960184` | [viewer](https://orchid-project.org/phase-diagrams/#RU-SI/RuSi-01Du-LB.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/RuSi-01Du-LB.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/RuSi-01Du-LB.json) |
| RuSi-01Liu.tdb | Y.Q. Liu, G. Shao, K.P. Homewood, J. Alloys Compd., 320, 72-79(2001). [doi:10.1016/S0925-8388(01)00931-8](https://doi.org/10.1016/S0925-8388%2801%2900931-8) | `a229255af0c2e5ae55074d56e80f93a7b08e40c5d07ae943f4bbe8e1951708f4` | [viewer](https://orchid-project.org/phase-diagrams/#RU-SI/RuSi-01Liu.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/RuSi-01Liu.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/RuSi-01Liu.json) |
| RuSi-09Lon.tdb | Z.H. Long, H.S. Liu, Z.P. Jin, J. Alloys Compd., 479, 262-67(2009). [doi:10.1016/j.jallcom.2009.01.079](https://doi.org/10.1016/j.jallcom.2009.01.079) | `6b726c2f0814471a370bbdcb9e252adb9130cd416c639c037fb990d67613b213` | [viewer](https://orchid-project.org/phase-diagrams/#RU-SI/RuSi-09Lon.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/RuSi-09Lon.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/RuSi-09Lon.json) |
| RuSi-95Che.tdb | P.-Y. Chevalier, E. Fischer, unpublished work, 1995. | `fac3db235d64c253a562bee8887eeebfaf27c4e2e04700be67865d339364d189` | [viewer](https://orchid-project.org/phase-diagrams/#RU-SI/RuSi-95Che.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/RuSi-95Che.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/RuSi-95Che.json) |

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

| TDB file | T (K) | Phases at the invariant |
|---|---:|---|
| RuSi-01Du-LB.tdb | 1957.79 | RUSI (x(Si) 0.5) + LIQUID (x(Si) 0.5995) + RU2SI3 (x(Si) 0.6) |
| RuSi-01Du-LB.tdb | 1957.79 | RUSI (x(Si) 0.5) + LIQUID (x(Si) 0.59937) + RU2SI3 (x(Si) 0.6) |
| RuSi-01Du-LB.tdb | 1957.79 | RUSI (x(Si) 0.5) + LIQUID (x(Si) 0.59983) + RU2SI3 (x(Si) 0.6) |
| RuSi-01Du-LB.tdb | 1830.01 | LIQUID (x(Si) 0.29217) + RU4SI3 (x(Si) 0.42857) + RUSI (x(Si) 0.5) |
| RuSi-01Du-LB.tdb | 1830.01 | LIQUID (x(Si) 0.29239) + RU4SI3 (x(Si) 0.42857) + RUSI (x(Si) 0.5) |
| RuSi-01Du-LB.tdb | 1822.42 | LIQUID (x(Si) 0.28571) + RU2SI_C37 (x(Si) 0.33333) + RU4SI3 (x(Si) 0.42857) |
| RuSi-01Du-LB.tdb | 1822.42 | LIQUID (x(Si) 0.28551) + RU2SI_C37 (x(Si) 0.33333) + RU4SI3 (x(Si) 0.42857) |
| RuSi-01Du-LB.tdb | 1814.5 | HCP_A3 (x(Si) 0.05207) + LIQUID (x(Si) 0.27129) + RU2SI_C37 (x(Si) 0.33333) |
| RuSi-01Du-LB.tdb | 1814.5 | HCP_A3 (x(Si) 0.05206) + LIQUID (x(Si) 0.27127) + RU2SI_C37 (x(Si) 0.33333) |
| RuSi-01Du-LB.tdb | 1561.64 | RU2SI3 (x(Si) 0.6) + LIQUID (x(Si) 0.87768) + DIAMOND_A4 (x(Si) 1) |
| RuSi-01Du-LB.tdb | 1561.64 | RU2SI3 (x(Si) 0.6) + LIQUID (x(Si) 0.87788) + DIAMOND_A4 (x(Si) 1) |
| RuSi-01Du-LB.tdb | 1561.64 | RU2SI3 (x(Si) 0.6) + LIQUID (x(Si) 0.87796) + DIAMOND_A4 (x(Si) 1) |
| RuSi-01Du-LB.tdb | 1561.64 | RU2SI3 (x(Si) 0.6) + LIQUID (x(Si) 0.87796) + DIAMOND_A4 (x(Si) 1) |
| RuSi-01Du-LB.tdb | 1519.65 | HCP_A3 (x(Si) 0.02543) + RU2SI_C37 (x(Si) 0.33333) + RU4SI3 (x(Si) 0.42857) |
| RuSi-01Du-LB.tdb | 1519.65 | HCP_A3 (x(Si) 0.02542) + RU2SI_C37 (x(Si) 0.33333) + RU4SI3 (x(Si) 0.42857) |
| RuSi-01Du-LB.tdb | 1519.65 | HCP_A3 (x(Si) 0.0254) + RU2SI_C37 (x(Si) 0.33333) + RU4SI3 (x(Si) 0.42857) |
| RuSi-01Du-LB.tdb | 1519.65 | HCP_A3 (x(Si) 0.0254) + RU2SI_C37 (x(Si) 0.33333) + RU4SI3 (x(Si) 0.42857) |
| RuSi-01Liu.tdb | 1969.39 | RUSI (x(Si) 0.5) + LIQUID (x(Si) 0.56828) + RU2SI3 (x(Si) 0.6) |
| RuSi-01Liu.tdb | 1969.39 | RUSI (x(Si) 0.5) + LIQUID (x(Si) 0.56814) + RU2SI3 (x(Si) 0.6) |
| RuSi-01Liu.tdb | 1838.52 | LIQUID (x(Si) 0.34411) + RU4SI3 (x(Si) 0.42857) + RUSI (x(Si) 0.5) |
| RuSi-01Liu.tdb | 1838.52 | LIQUID (x(Si) 0.34434) + RU4SI3 (x(Si) 0.42857) + RUSI (x(Si) 0.5) |
| RuSi-01Liu.tdb | 1820.16 | LIQUID (x(Si) 0.32752) + RU2SI_C37 (x(Si) 0.33333) + RU4SI3 (x(Si) 0.42857) |
| RuSi-01Liu.tdb | 1820.15 | LIQUID (x(Si) 0.32701) + RU2SI_C37 (x(Si) 0.33333) + RU4SI3 (x(Si) 0.42857) |
| RuSi-01Liu.tdb | 1820.15 | LIQUID (x(Si) 0.32683) + RU2SI_C37 (x(Si) 0.33333) + RU4SI3 (x(Si) 0.42857) |
| RuSi-01Liu.tdb | 1809.06 | HCP_A3 (x(Si) 0.04591) + LIQUID (x(Si) 0.29197) + RU2SI_C37 (x(Si) 0.33333) |
| RuSi-01Liu.tdb | 1809.06 | HCP_A3 (x(Si) 0.04588) + LIQUID (x(Si) 0.29192) + RU2SI_C37 (x(Si) 0.33333) |
| RuSi-01Liu.tdb | 1572.86 | RU2SI3 (x(Si) 0.6) + LIQUID (x(Si) 0.85977) + DIAMOND_A4 (x(Si) 1) |
| RuSi-01Liu.tdb | 1572.86 | RU2SI3 (x(Si) 0.6) + LIQUID (x(Si) 0.85979) + DIAMOND_A4 (x(Si) 1) |
| RuSi-01Liu.tdb | 1540.32 | HCP_A3 (x(Si) 0.02956) + RU2SI_C37 (x(Si) 0.33333) + RU4SI3 (x(Si) 0.42857) |
| RuSi-01Liu.tdb | 1540.32 | HCP_A3 (x(Si) 0.02954) + RU2SI_C37 (x(Si) 0.33333) + RU4SI3 (x(Si) 0.42857) |
| RuSi-01Liu.tdb | 1540.32 | HCP_A3 (x(Si) 0.02955) + RU2SI_C37 (x(Si) 0.33333) + RU4SI3 (x(Si) 0.42857) |
| RuSi-09Lon.tdb | 1957.57 | RUSI (x(Si) 0.5) + LIQUID (x(Si) 0.57751) + RU2SI3 (x(Si) 0.6) |
| RuSi-09Lon.tdb | 1957.57 | RUSI (x(Si) 0.5) + LIQUID (x(Si) 0.57708) + RU2SI3 (x(Si) 0.6) |
| RuSi-09Lon.tdb | 1957.57 | RUSI (x(Si) 0.5) + LIQUID (x(Si) 0.57773) + RU2SI3 (x(Si) 0.6) |
| RuSi-09Lon.tdb | 1834.39 | LIQUID (x(Si) 0.29959) + RU4SI3 (x(Si) 0.42857) + RUSI (x(Si) 0.5) |
| RuSi-09Lon.tdb | 1834.39 | LIQUID (x(Si) 0.29976) + RU4SI3 (x(Si) 0.42857) + RUSI (x(Si) 0.5) |
| RuSi-09Lon.tdb | 1814.32 | LIQUID (x(Si) 0.28047) + RU2SI_C37 (x(Si) 0.33333) + RU4SI3 (x(Si) 0.42857) |
| RuSi-09Lon.tdb | 1814.32 | LIQUID (x(Si) 0.28023) + RU2SI_C37 (x(Si) 0.33333) + RU4SI3 (x(Si) 0.42857) |
| RuSi-09Lon.tdb | 1814.32 | LIQUID (x(Si) 0.28009) + RU2SI_C37 (x(Si) 0.33333) + RU4SI3 (x(Si) 0.42857) |
| RuSi-09Lon.tdb | 1810.49 | HCP_A3 (x(Si) 0.05336) + LIQUID (x(Si) 0.27274) + RU2SI_C37 (x(Si) 0.33333) |
| RuSi-09Lon.tdb | 1810.49 | HCP_A3 (x(Si) 0.05331) + LIQUID (x(Si) 0.27267) + RU2SI_C37 (x(Si) 0.33333) |
| RuSi-09Lon.tdb | 1572.11 | RU2SI3 (x(Si) 0.6) + LIQUID (x(Si) 0.88472) + DIAMOND_A4 (x(Si) 1) |
| RuSi-09Lon.tdb | 1572.11 | RU2SI3 (x(Si) 0.6) + LIQUID (x(Si) 0.88473) + DIAMOND_A4 (x(Si) 1) |
| RuSi-09Lon.tdb | 1554.24 | HCP_A3 (x(Si) 0.02452) + RU2SI_C37 (x(Si) 0.33333) + RU4SI3 (x(Si) 0.42857) |
| RuSi-09Lon.tdb | 1554.24 | HCP_A3 (x(Si) 0.02452) + RU2SI_C37 (x(Si) 0.33333) + RU4SI3 (x(Si) 0.42857) |
| RuSi-09Lon.tdb | 1554.24 | HCP_A3 (x(Si) 0.02449) + RU2SI_C37 (x(Si) 0.33333) + RU4SI3 (x(Si) 0.42857) |
| RuSi-09Lon.tdb | 1554.24 | HCP_A3 (x(Si) 0.02451) + RU2SI_C37 (x(Si) 0.33333) + RU4SI3 (x(Si) 0.42857) |
| RuSi-95Che.tdb | 1985.58 | RUSI (x(Si) 0.5) + LIQUID (x(Si) 0.59493) + RU2SI3 (x(Si) 0.6) |
| RuSi-95Che.tdb | 1985.58 | RUSI (x(Si) 0.5) + LIQUID (x(Si) 0.59474) + RU2SI3 (x(Si) 0.6) |
| RuSi-95Che.tdb | 1985.58 | RUSI (x(Si) 0.5) + LIQUID (x(Si) 0.59503) + RU2SI3 (x(Si) 0.6) |
| RuSi-95Che.tdb | 1948.13 | LIQUID (x(Si) 0.39313) + RU4SI3 (x(Si) 0.42857) + RUSI (x(Si) 0.5) |
| RuSi-95Che.tdb | 1948.12 | LIQUID (x(Si) 0.39275) + RU4SI3 (x(Si) 0.42857) + RUSI (x(Si) 0.5) |
| RuSi-95Che.tdb | 1822.74 | LIQUID (x(Si) 0.32583) + RU5SI3 (x(Si) 0.375) + RU4SI3 (x(Si) 0.42857) |
| RuSi-95Che.tdb | 1822.74 | LIQUID (x(Si) 0.32594) + RU5SI3 (x(Si) 0.375) + RU4SI3 (x(Si) 0.42857) |
| RuSi-95Che.tdb | 1822.74 | LIQUID (x(Si) 0.32598) + RU5SI3 (x(Si) 0.375) + RU4SI3 (x(Si) 0.42857) |
| RuSi-95Che.tdb | 1817.69 | LIQUID (x(Si) 0.32295) + RU2SI_C37 (x(Si) 0.33333) + RU5SI3 (x(Si) 0.375) |
| RuSi-95Che.tdb | 1817.69 | LIQUID (x(Si) 0.32291) + RU2SI_C37 (x(Si) 0.33333) + RU5SI3 (x(Si) 0.375) |
| RuSi-95Che.tdb | 1752.41 | HCP_A3 (x(Si) 6.000e-5) + LIQUID (x(Si) 0.27465) + RU2SI_C37 (x(Si) 0.33333) |
| RuSi-95Che.tdb | 1752.41 | HCP_A3 (x(Si) 6.000e-5) + LIQUID (x(Si) 0.27464) + RU2SI_C37 (x(Si) 0.33333) |
| RuSi-95Che.tdb | 1631.83 | RU2SI3 (x(Si) 0.6) + LIQUID (x(Si) 0.81521) + DIAMOND_A4 (x(Si) 0.98397) |
| RuSi-95Che.tdb | 1631.83 | RU2SI3 (x(Si) 0.6) + LIQUID (x(Si) 0.81526) + DIAMOND_A4 (x(Si) 0.98398) |
| RuSi-95Che.tdb | 1603.09 | RU2SI_C37 (x(Si) 0.33333) + RU5SI3 (x(Si) 0.375) + RU4SI3 (x(Si) 0.42857) |
| RuSi-95Che.tdb | 1506.67 | HCP_A3 (x(Si) 1.000e-5) + RU2SI_C37 (x(Si) 0.33333) + RU4SI3 (x(Si) 0.42857) |
| RuSi-95Che.tdb | 1506.67 | HCP_A3 (x(Si) 1.000e-5) + RU2SI_C37 (x(Si) 0.33333) + RU4SI3 (x(Si) 0.42857) |
| RuSi-95Che.tdb | 1506.67 | HCP_A3 (x(Si) 1.000e-5) + RU2SI_C37 (x(Si) 0.33333) + RU4SI3 (x(Si) 0.42857) |

Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/RU/RU-SI.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/RU/RU-SI.json) · [CALPHAD hull RuSi-01Du-LB](https://data.orchid-project.org/hulls/calphad-sgte/RU/RU-SI--RuSi-01Du-LB.json) · [CALPHAD hull RuSi-01Liu](https://data.orchid-project.org/hulls/calphad-sgte/RU/RU-SI--RuSi-01Liu.json) · [CALPHAD hull RuSi-95Che](https://data.orchid-project.org/hulls/calphad-sgte/RU/RU-SI--RuSi-95Che.json)

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Ru–Si system (57)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 2143 | congruent melting: liquid = RuSi | liquid: Ru 0.5, Si 0.5; RuSi: Ru 0.5, Si 0.5 | experimental | [1] Liu 2001; _cites Savitsky 1978_ | Table 3, p. 6, row 22; `ORC-LPRRJ7ZN7O` |  |
| 2023 | congruent melting: liquid = RuSi | liquid: Ru 0.5, Si 0.5; RuSi: Ru 0.5, Si 0.5 | unspecified | [1] Liu 2001; _cites Mann 1995_ | Table 3, p. 6, row 20; `ORC-KUHQMYUTBK` |  |
| 2004 | congruent melting: liquid = RuSi | liquid: Ru 0.5, Si 0.5; RuSi: Ru 0.5, Si 0.5 | model | [1] Liu 2001 | Table 3, p. 6, row 23; `ORC-YAFBOZM37H` |  |
| 2003 | congruent melting: liquid = RuSi | liquid: Ru 0.5, Si 0.5; RuSi: Ru 0.5, Si 0.5 | experimental | [1] Liu 2001; _cites Weitzer 1988_ | Table 3, p. 6, row 19; `ORC-MUCFCHSSVZ` |  |
| 2003 | congruent melting: liquid = RuSi | liquid: Ru 0.5, Si 0.5; RuSi: Ru 0.5, Si 0.5 | experimental | [1] Liu 2001; _cites Massalski 1990_ | Table 3, p. 6, row 21; `ORC-WHK7SGK7FG` |  |
| 2003 | congruent melting: L \<=> RuSi | L: Ru 0.5, Si 0.5; RuSi: Ru 0.5, Si 0.5 | model | [2] Long 2009; _cites Liu 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2900931-8) | Table 6, p. 5, row 26; `ORC-YJ4NJH43TO` |  |
| 2000 | congruent melting: L \<=> RuSi | L: Ru 0.5, Si 0.5; RuSi: Ru 0.5, Si 0.5 | model | [2] Long 2009; _cites Du 2001_ | Table 6, p. 5, row 27; `ORC-O2BWHE7WHC` |  |
| 1983 | congruent melting: liquid = Ru2Si3 | liquid: Ru 0.4, Si 0.6; Ru2Si3: Ru 0.4, Si 0.6 | unspecified | [1] Liu 2001; _cites Weitzer 1988_ | Table 3, p. 6, row 24; `ORC-Y4QOLANPW3` |  |
| 1981 | congruent melting: L \<=> RuSi | L: Ru 0.5, Si 0.5; RuSi: Ru 0.5, Si 0.5 | model | [2] Long 2009 | Table 6, p. 5, row 28; `ORC-EBIPFUKWMH` |  |
| 1976 | congruent melting: L \<=> Ru2Si3 | L: Ru 0.4, Si 0.6; Ru2Si3: Ru 0.4, Si 0.6 | model | [2] Long 2009; _cites Liu 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2900931-8) | Table 6, p. 5, row 30; `ORC-JOJ7SAV3MY` |  |
| 1976 | congruent melting: liquid = Ru2Si3 | liquid: Ru 0.4, Si 0.6; Ru2Si3: Ru 0.4, Si 0.6 | model | [1] Liu 2001 | Table 3, p. 6, row 25; `ORC-W3T3CQVWWC` |  |
| 1973 | congruent melting: L \<=> Ru2Si3 | L: Ru 0.4, Si 0.6; Ru2Si3: Ru 0.4, Si 0.6 | experimental | [2] Long 2009; _cites Obrowski 1965_ | Table 6, p. 5, row 29; `ORC-25ZEV55YUA` |  |
| 1973 | congruent melting: L \<=> RuSi | L: Ru 0.5, Si 0.5; RuSi: Ru 0.5, Si 0.5 | experimental | [2] Long 2009; _cites Obrowski 1965_ | Table 6, p. 5, row 25; `ORC-YVKPQESAOL` |  |
| 1968 | liquid = RuSi + Ru2Si3 | liquid: Si 0.568; RuSi: Si 0.5; Ru2Si3: Si 0.6 | model | [1] Liu 2001 | Table 3, p. 6, row 3; `ORC-4XBJ5CE5VX` |  |
| 1968 | eutectic: L \<=> RuSi + Ru2Si3 | L: Si 0.568; RuSi: Ru 0.5, Si 0.5; Ru2Si3: Ru 0.4, Si 0.6 | model | [2] Long 2009; _cites Liu 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2900931-8) | Table 6, p. 5, row 18; `ORC-F4MCWZUG63` |  |
| 1968 | liquid + RuSi = Ru4Si3 | RuSi: Ru 0.5, Si 0.5; Ru4Si3: Ru 0.571429, Si 0.428571 | unspecified | [1] Liu 2001; _cites Weitzer 1988_ | Table 3, p. 6, row 8; `ORC-GM722EHSXK` |  |
| 1963 | liquid = RuSi + Ru2Si3 | liquid: Si 0.56; RuSi: Si 0.5; Ru2Si3: Si 0.6 | unspecified | [1] Liu 2001; _cites Weitzer 1988_ | Table 3, p. 6, row 2; `ORC-PN7FECHAXR` |  |
| 1960 | congruent melting: L \<=> Ru2Si3 | L: Ru 0.4, Si 0.6; Ru2Si3: Ru 0.4, Si 0.6 | model | [2] Long 2009 | Table 6, p. 5, row 32; `ORC-WZCT3IA4CW` |  |
| 1959 | congruent melting: L \<=> Ru2Si3 | L: Ru 0.4, Si 0.6; Ru2Si3: Ru 0.4, Si 0.6 | model | [2] Long 2009; _cites Du 2001_ | Table 6, p. 5, row 31; `ORC-NAEWSDGOEL` |  |
| 1958 | eutectic: L \<=> RuSi + Ru2Si3 | L: Si 0.596; RuSi: Ru 0.5, Si 0.5; Ru2Si3: Ru 0.4, Si 0.6 | model | [2] Long 2009; _cites Du 2001_ | Table 6, p. 5, row 19; `ORC-NNXKVOS57A` |  |
| 1958 | eutectic: L \<=> RuSi + Ru2Si3 | L: Si 0.575; RuSi: Ru 0.5, Si 0.5; Ru2Si3: Ru 0.4, Si 0.6 | model | [2] Long 2009 | Table 6, p. 5, row 20; `ORC-NPXS6ARKDK` |  |
| 1953 | liquid = RuSi + Ru2Si3 | RuSi: Ru 0.5, Si 0.5; Ru2Si3: Ru 0.4, Si 0.6 | experimental | [1] Liu 2001; _cites Perring 1999_ [doi](https://doi.org/10.1016/s0925-8388%2898%2900911-6) | Table 3, p. 6, row 1; `ORC-FYFNULDEXG` |  |
| 1953 | eutectic: L \<=> RuSi + Ru2Si3 | RuSi: Ru 0.5, Si 0.5; Ru2Si3: Ru 0.4, Si 0.6 | experimental | [2] Long 2009; _cites Perring 1999_ [doi](https://doi.org/10.1016/s0925-8388%2898%2900911-6) | Table 6, p. 5, row 17; `ORC-GUCFN5SC7W` |  |
| 1836 | liquid + RuSi = Ru4Si3 | liquid: Si 0.343; RuSi: Si 0.5; Ru4Si3: Si 0.429 | model | [1] Liu 2001 | Table 3, p. 6, row 9; `ORC-M4MU6CW4Q3` |  |
| 1836 | peritectic: L + RuSi \<=> Ru4Si3 | L: Si 0.343; RuSi: Ru 0.5, Si 0.5; Ru4Si3: Ru 0.571429, Si 0.428571 | model | [2] Long 2009; _cites Liu 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2900931-8) | Table 6, p. 5, row 14; `ORC-QB7LNIGJFT` |  |
| 1834 | peritectic: L + RuSi \<=> Ru4Si3 | L: Si 0.3; RuSi: Ru 0.5, Si 0.5; Ru4Si3: Ru 0.571429, Si 0.428571 | model | [2] Long 2009 | Table 6, p. 5, row 16; `ORC-CHTDWREOF5` |  |
| 1833 | liquid + RuSi = Ru4Si3 | RuSi: Ru 0.5, Si 0.5; Ru4Si3: Ru 0.571429, Si 0.428571 | experimental | [1] Liu 2001; _cites Perring 1999_ [doi](https://doi.org/10.1016/s0925-8388%2898%2900911-6) | Table 3, p. 6, row 7; `ORC-PXUYSJABBE` |  |
| 1833 | peritectic: L + RuSi \<=> Ru4Si3 | RuSi: Ru 0.5, Si 0.5; Ru4Si3: Ru 0.571429, Si 0.428571 | experimental | [2] Long 2009; _cites Perring 1999_ [doi](https://doi.org/10.1016/s0925-8388%2898%2900911-6) | Table 6, p. 5, row 13; `ORC-XVKEKYQHOT` |  |
| 1830 | peritectic: L + RuSi \<=> Ru4Si3 | L: Si 0.296; RuSi: Ru 0.5, Si 0.5; Ru4Si3: Ru 0.571429, Si 0.428571 | model | [2] Long 2009; _cites Du 2001_ | Table 6, p. 5, row 15; `ORC-XSP53KFCIJ` |  |
| 1822 | peritectic: L + Ru4Si3 \<=> Ru2Si | L: Si 0.288; Ru4Si3: Ru 0.571429, Si 0.428571; Ru2Si: Ru 0.666667, Si 0.333333 | model | [2] Long 2009; _cites Du 2001_ | Table 6, p. 5, row 7; `ORC-7JIRFDF3AA` |  |
| 1821 | peritectic: L + Ru4Si3 \<=> Ru2Si | L: Si 0.329; Ru4Si3: Ru 0.571429, Si 0.428571; Ru2Si: Ru 0.666667, Si 0.333333 | model | [2] Long 2009; _cites Liu 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2900931-8) | Table 6, p. 5, row 6; `ORC-IORQCSISZU` |  |
| 1821 | liquid + Ru4Si3 = Ru2Si | liquid: Si 0.329; Ru4Si3: Si 0.429; Ru2Si: Si 0.333 | model | [1] Liu 2001 | Table 3, p. 6, row 11; `ORC-ZI72MT5JHC` |  |
| 1817 | liquid + Ru4Si3 = Ru2Si | Ru4Si3: Ru 0.571429, Si 0.428571; Ru2Si: Ru 0.666667, Si 0.333333 | experimental | [1] Liu 2001; _cites Perring 1999_ [doi](https://doi.org/10.1016/s0925-8388%2898%2900911-6) | Table 3, p. 6, row 10; `ORC-2BTOY7ZBR5` |  |
| 1817 | peritectic: L + Ru4Si3 \<=> Ru2Si | Ru4Si3: Ru 0.571429, Si 0.428571; Ru2Si: Ru 0.666667, Si 0.333333 | experimental | [2] Long 2009; _cites Perring 1999_ [doi](https://doi.org/10.1016/s0925-8388%2898%2900911-6) | Table 6, p. 5, row 5; `ORC-GYEUDNDR72` |  |
| 1816 | peritectic: L + Ru4Si3 \<=> Ru2Si | L: Si 0.285; Ru4Si3: Ru 0.571429, Si 0.428571; Ru2Si: Ru 0.666667, Si 0.333333 | model | [2] Long 2009 | Table 6, p. 5, row 8; `ORC-JNM3CN77E7` |  |
| 1814 | eutectic: L \<=> Hcp (Ru) + Ru2Si | L: Si 0.27; Ru2Si: Ru 0.666667, Si 0.333333 | model | [2] Long 2009; _cites Du 2001_ | Table 6, p. 5, row 3; `ORC-QD27RCPK3H` |  |
| 1813 | eutectic: L \<=> Hcp (Ru) + Ru2Si | Ru2Si: Ru 0.666667, Si 0.333333 | experimental | [2] Long 2009; _cites Perring 1999_ [doi](https://doi.org/10.1016/s0925-8388%2898%2900911-6) | Table 6, p. 5, row 1; `ORC-V7MYKMSA2B` |  |
| 1813 | liquid = (Ru) + Ru2Si | Ru2Si: Ru 0.666667, Si 0.333333 | experimental | [1] Liu 2001; _cites Perring 1999_ [doi](https://doi.org/10.1016/s0925-8388%2898%2900911-6) | Table 3, p. 6, row 12; `ORC-WQIFDSLNAW` |  |
| 1811 | eutectic: L \<=> Hcp (Ru) + Ru2Si | L: Si 0.275; Ru2Si: Ru 0.666667, Si 0.333333 | model | [2] Long 2009 | Table 6, p. 5, row 4; `ORC-RO4EFCWL4R` |  |
| 1809 | eutectic: L \<=> Hcp (Ru) + Ru2Si | L: Si 0.292; Ru2Si: Ru 0.666667, Si 0.333333 | model | [2] Long 2009; _cites Liu 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2900931-8) | Table 6, p. 5, row 2; `ORC-7E5MAVASFQ` |  |
| 1809 | liquid = (Ru) + Ru2Si | liquid: Si 0.292; (Ru): Si 0.0452; Ru2Si: Si 0.333 | model | [1] Liu 2001 | Table 3, p. 6, row 15; `ORC-PSND3AYBNV` |  |
| 1778 | liquid = (Ru) + Ru2Si | liquid: Si 0.3; Ru2Si: Ru 0.666667, Si 0.333333 | experimental | [1] Liu 2001; _cites Weitzer 1988_ | Table 3, p. 6, row 13; `ORC-RUWPMH7XKH` |  |
| 1763 | liquid = (Ru) + Ru2Si | Ru2Si: Ru 0.666667, Si 0.333333 | experimental | [1] Liu 2001; _cites Savitsky 1978_ | Table 3, p. 6, row 14; `ORC-SMMWMY3RZC` |  |
| 1643 | liquid = Ru2Si3 + Diamond | liquid: Si 0.83; Ru2Si3: Si 0.6; Diamond: Si 0.97 | unspecified | [1] Liu 2001; _cites Weitzer 1988_ | Table 3, p. 6, row 5; `ORC-ROPKGZGL5Y` |  |
| 1573 | eutectic: L \<=> Ru2Si3 + Diamond (Si) | Ru2Si3: Ru 0.4, Si 0.6 | experimental | [2] Long 2009; _cites Perring 1999_ [doi](https://doi.org/10.1016/s0925-8388%2898%2900911-6) | Table 6, p. 5, row 21; `ORC-7MOYIU5DWL` |  |
| 1573 | liquid = Ru2Si3 + Diamond | Ru2Si3: Ru 0.4, Si 0.6; Diamond: Si 1 | experimental | [1] Liu 2001; _cites Perring 1999_ [doi](https://doi.org/10.1016/s0925-8388%2898%2900911-6) | Table 3, p. 6, row 4; `ORC-NWS6KGF2RX` |  |
| 1572 | eutectic: L \<=> Ru2Si3 + Diamond (Si) | L: Si 0.88; Ru2Si3: Ru 0.4, Si 0.6 | model | [2] Long 2009 | Table 6, p. 5, row 24; `ORC-PCNOOKCNMB` |  |
| 1571 | eutectic: L \<=> Ru2Si3 + Diamond (Si) | L: Si 0.86; Ru2Si3: Ru 0.4, Si 0.6 | model | [2] Long 2009; _cites Liu 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2900931-8) | Table 6, p. 5, row 22; `ORC-G6O35LQ54D` |  |
| 1571 | liquid = Ru2Si3 + Diamond | liquid: Si 0.86; Ru2Si3: Si 0.6; Diamond: Si 1 | model | [1] Liu 2001 | Table 3, p. 6, row 6; `ORC-S3EWCWUOSP` |  |
| 1562 | eutectic: L \<=> Ru2Si3 + Diamond (Si) | L: Si 0.878; Ru2Si3: Ru 0.4, Si 0.6 | model | [2] Long 2009; _cites Du 2001_ | Table 6, p. 5, row 23; `ORC-I6MZHQELH6` |  |
| 1520 | eutectic: Ru2Si \<=> Hcp (Ru) + Ru4Si3 | Ru2Si: Ru 0.666667, Si 0.333333; Ru4Si3: Ru 0.571429, Si 0.428571 | model | [2] Long 2009; _cites Du 2001_ | Table 6, p. 5, row 11; `ORC-R4I4OERRMM` |  |
| 1518 | Ru2Si = (Ru) + Ru4Si3 | Ru2Si: Ru 0.666667, Si 0.333333; Ru4Si3: Ru 0.571429, Si 0.428571 | experimental | [1] Liu 2001; _cites Perring 1999_ [doi](https://doi.org/10.1016/s0925-8388%2898%2900911-6) | Table 3, p. 6, row 16; `ORC-4H5ALG7AMR` |  |
| 1518 | eutectic: Ru2Si \<=> Hcp (Ru) + Ru4Si3 | Ru2Si: Ru 0.666667, Si 0.333333; Ru4Si3: Ru 0.571429, Si 0.428571 | model | [2] Long 2009 | Table 6, p. 5, row 12; `ORC-O2PV7FYBIJ` |  |
| 1518 | eutectic: Ru2Si \<=> Hcp (Ru) + Ru4Si3 | Ru2Si: Ru 0.666667, Si 0.333333; Ru4Si3: Ru 0.571429, Si 0.428571 | experimental | [2] Long 2009; _cites Perring 1999_ [doi](https://doi.org/10.1016/s0925-8388%2898%2900911-6) | Table 6, p. 5, row 9; `ORC-SNDA6JWKCS` |  |
| 1518 | eutectic: Ru2Si \<=> Hcp (Ru) + Ru4Si3 | Ru2Si: Ru 0.666667, Si 0.333333; Ru4Si3: Ru 0.571429, Si 0.428571 | model | [2] Long 2009; _cites Liu 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2900931-8) | Table 6, p. 5, row 10; `ORC-SQ5IWU73GH` |  |
| 1518 | Ru2Si = (Ru) + Ru4Si3 | Ru2Si: Si 0.333; (Ru): Si 0.0281; Ru4Si3: Si 0.429 | model | [1] Liu 2001 | Table 3, p. 6, row 18; `ORC-Y7FFCXBNRH` |  |
| 1498 | Ru2Si = (Ru) + Ru4Si3 | Ru2Si: Ru 0.666667, Si 0.333333; Ru4Si3: Ru 0.571429, Si 0.428571 | experimental | [1] Liu 2001; _cites Weitzer 1988_ | Table 3, p. 6, row 17; `ORC-7MO5GCPZEK` |  |

## 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, Ru–Si system (40)

| Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote |
|---|---|---:|---:|---|---:|---:|---|---|---|
| Ru2Si | [Ru2Si](https://data.orchid-project.org/compounds/Ru2Si.html) | -38.7 kJ/mol-atom |  | model | -39.077 (mp-aaaaaovp) | -38.314 (oqmd-8148) | [1] Liu 2001 | Table 1, p. 2, row 25; `ORC-PGAFJUUGD4` |  |
| Ru2Si | [Ru2Si](https://data.orchid-project.org/compounds/Ru2Si.html) | -37.6 kJ/mol-atom |  | model | -39.077 (mp-aaaaaovp) | -38.314 (oqmd-8148) | [1] Liu 2001; _cites Pasturel 1984_ | Table 1, p. 2, row 23; `ORC-EE4LJHGEAT` |  |
| Ru2Si | [Ru2Si](https://data.orchid-project.org/compounds/Ru2Si.html) | -29 kJ/mol-atom |  | model | -39.077 (mp-aaaaaovp) | -38.314 (oqmd-8148) | [1] Liu 2001; _cites F 1988_ | Table 1, p. 2, row 22; `ORC-T6KSYB4GL5` |  |
| Ru2Si | [Ru2Si](https://data.orchid-project.org/compounds/Ru2Si.html) | -22.2 kJ/mol-atom |  | model | -39.077 (mp-aaaaaovp) | -38.314 (oqmd-8148) | [1] Liu 2001; _cites Searcy 1962_ | Table 1, p. 2, row 24; `ORC-3SXUKRL2DE` |  |
| Ru2Si3 | [Ru2Si3](https://data.orchid-project.org/compounds/Ru2Si3.html) | -60.7 kJ/mol-atom ± 1.7 | 298.15 | experimental | -61.195 (mp-aaaabgvo) | -60.271 (oqmd-2149) | [2] Long 2009; _cites Perring 1998_ [doi](https://doi.org/10.1002/bbpc.19981020925) | Table 1, p. 2, row 12; `ORC-6O6ZZDCLP2` |  |
| Ru2Si3 | [Ru2Si3](https://data.orchid-project.org/compounds/Ru2Si3.html) | -60.7 kJ/mol-atom ± 1.7 | 298.15 | experimental | -61.195 (mp-aaaabgvo) | -60.271 (oqmd-2149) | [1] Liu 2001; _cites Meschel 1998_ [doi](https://doi.org/10.1016/s0925-8388%2898%2900504-0) | Table 1, p. 2, row 13; `ORC-FBOT7E6AZD` |  |
| Ru2Si3 | [Ru2Si3](https://data.orchid-project.org/compounds/Ru2Si3.html) | -53.053 kJ/mol-atom | 298.15 | model | -61.195 (mp-aaaabgvo) | -60.271 (oqmd-2149) | [2] Long 2009 | Table 1, p. 2, row 15; `ORC-EWXMHVI66O` |  |
| Ru2Si3 | [Ru2Si3](https://data.orchid-project.org/compounds/Ru2Si3.html) | -50.3 kJ/mol-atom ± 1 | 1704 | experimental | -61.195 (mp-aaaabgvo) | -60.271 (oqmd-2149) | [1] Liu 2001; _cites Perring 1997_ [doi](https://doi.org/10.1016/s0040-6031%2897%2900041-5) | Table 1, p. 2, row 14; `ORC-SYECQ5RETF` |  |
| Ru2Si3 | [Ru2Si3](https://data.orchid-project.org/compounds/Ru2Si3.html) | -50.3 kJ/mol-atom ± 1 | 1704 | experimental | -61.195 (mp-aaaabgvo) | -60.271 (oqmd-2149) | [2] Long 2009; _cites Perring 1997_ [doi](https://doi.org/10.1016/s0040-6031%2897%2900041-5) | Table 1, p. 2, row 11; `ORC-YBJAFCOK4E` |  |
| Ru2Si3 | [Ru2Si3](https://data.orchid-project.org/compounds/Ru2Si3.html) | -49.2 kJ/mol-atom | 298.15 | experimental | -61.195 (mp-aaaabgvo) | -60.271 (oqmd-2149) | [1] Liu 2001; _cites Kuntz 1997_ [doi](https://doi.org/10.1006/jssc.1997.7508) | Table 1, p. 2, row 15; `ORC-RNRZJL6SW7` |  |
| Ru2Si3 | [Ru2Si3](https://data.orchid-project.org/compounds/Ru2Si3.html) | -49.06 kJ/mol-atom |  | model | -61.195 (mp-aaaabgvo) | -60.271 (oqmd-2149) | [1] Liu 2001 | Table 1, p. 2, row 19; `ORC-5J26SQTRMD` |  |
| Ru2Si3 | [Ru2Si3](https://data.orchid-project.org/compounds/Ru2Si3.html) | -49.06 kJ/mol-atom | 298.15 | model | -61.195 (mp-aaaabgvo) | -60.271 (oqmd-2149) | [2] Long 2009; _cites Liu 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2900931-8) | Table 1, p. 2, row 14; `ORC-EI3WZ5PTIE` |  |
| Ru2Si3 | [Ru2Si3](https://data.orchid-project.org/compounds/Ru2Si3.html) | -47.723 kJ/mol-atom | 298.15 | model | -61.195 (mp-aaaabgvo) | -60.271 (oqmd-2149) | [2] Long 2009; _cites Du 2001_ | Table 1, p. 2, row 13; `ORC-FTEXTWA77T` |  |
| Ru2Si3 | [Ru2Si3](https://data.orchid-project.org/compounds/Ru2Si3.html) | -26.8 kJ/mol-atom |  | model | -61.195 (mp-aaaabgvo) | -60.271 (oqmd-2149) | [1] Liu 2001; _cites Petersson 1982_ [doi](https://doi.org/10.1063/1.331319) | Table 1, p. 2, row 18; `ORC-5TLY4VVJZX` |  |
| Ru2Si3 | [Ru2Si3](https://data.orchid-project.org/compounds/Ru2Si3.html) | -26.8 kJ/mol-atom |  | unspecified | -61.195 (mp-aaaabgvo) | -60.271 (oqmd-2149) | [1] Liu 2001; _cites Mann 1995_ | Table 1, p. 2, row 16; `ORC-TWXXPBRTWJ` |  |
| Ru2Si3 | [Ru2Si3](https://data.orchid-project.org/compounds/Ru2Si3.html) | -26 kJ/mol-atom |  | model | -61.195 (mp-aaaabgvo) | -60.271 (oqmd-2149) | [1] Liu 2001; _cites F 1988_ | Table 1, p. 2, row 17; `ORC-XA6X4CDKZW` |  |
| Ru4Si3 | [Ru4Si3](https://data.orchid-project.org/compounds/Ru4Si3.html) | -57.561 kJ/mol-atom |  | model | -53.041 (mp-aaabdbbg) | -52.175 (oqmd-5838) | [1] Liu 2001 | Table 1, p. 2, row 21; `ORC-3LBR6PH5WX` |  |
| Ru4Si3 | [Ru4Si3](https://data.orchid-project.org/compounds/Ru4Si3.html) | -57.561 kJ/mol-atom | 298.15 | model | -53.041 (mp-aaabdbbg) | -52.175 (oqmd-5838) | [2] Long 2009; _cites Liu 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2900931-8) | Table 1, p. 2, row 3; `ORC-MYXVPSSVDZ` |  |
| Ru4Si3 | [Ru4Si3](https://data.orchid-project.org/compounds/Ru4Si3.html) | -55.011 kJ/mol-atom | 298.15 | model | -53.041 (mp-aaabdbbg) | -52.175 (oqmd-5838) | [2] Long 2009 | Table 1, p. 2, row 4; `ORC-PY43W6C3Y7` |  |
| Ru4Si3 | [Ru4Si3](https://data.orchid-project.org/compounds/Ru4Si3.html) | -47.788 kJ/mol-atom | 298.15 | model | -53.041 (mp-aaabdbbg) | -52.175 (oqmd-5838) | [2] Long 2009; _cites Du 2001_ | Table 1, p. 2, row 2; `ORC-4WDIVRKJB7` |  |
| Ru4Si3 | [Ru4Si3](https://data.orchid-project.org/compounds/Ru4Si3.html) | -45.9 kJ/mol-atom ± 0.6 | 1505 | experimental | -53.041 (mp-aaabdbbg) | -52.175 (oqmd-5838) | [2] Long 2009; _cites Perring 1997_ [doi](https://doi.org/10.1016/s0040-6031%2897%2900041-5) | Table 1, p. 2, row 1; `ORC-X3RUJM5KUY` |  |
| Ru4Si3 | [Ru4Si3](https://data.orchid-project.org/compounds/Ru4Si3.html) | -45.9 kJ/mol-atom ± 0.6 | 1505 | experimental | -53.041 (mp-aaabdbbg) | -52.175 (oqmd-5838) | [1] Liu 2001; _cites Perring 1997_ [doi](https://doi.org/10.1016/s0040-6031%2897%2900041-5) | Table 1, p. 2, row 20; `ORC-XDNFI45KOD` |  |
| RuSi | [RuSi](https://data.orchid-project.org/compounds/RuSi.html) | -58.3 kJ/mol-atom ± 2.1 | 298.15 | experimental | -62.629 (mp-aaaaaahh) | -61.662 (oqmd-14277) | [1] Liu 2001; _cites Meschel 1998_ [doi](https://doi.org/10.1016/s0925-8388%2898%2900504-0) | Table 1, p. 2, row 1; `ORC-C7UO2OD6VS` |  |
| RuSi | [RuSi](https://data.orchid-project.org/compounds/RuSi.html) | -58.3 kJ/mol-atom ± 2.1 | 298.15 | experimental | -62.629 (mp-aaaaaahh) | -61.662 (oqmd-14277) | [2] Long 2009; _cites Meschel 1998_ [doi](https://doi.org/10.1016/s0925-8388%2898%2900504-0) | Table 1, p. 2, row 6; `ORC-YI46HFFZGP` |  |
| RuSi | [RuSi](https://data.orchid-project.org/compounds/RuSi.html) | -58.1 kJ/mol-atom ± 3.7 | 298.15 | experimental | -62.629 (mp-aaaaaahh) | -61.662 (oqmd-14277) | [2] Long 2009; _cites Topor 1988_ | Table 1, p. 2, row 7; `ORC-EWAENUR3FG` |  |
| RuSi | [RuSi](https://data.orchid-project.org/compounds/RuSi.html) | -58.1 kJ/mol-atom ± 3.7 | 298.15 | experimental | -62.629 (mp-aaaaaahh) | -61.662 (oqmd-14277) | [1] Liu 2001; _cites Topor 1988_ | Table 1, p. 2, row 4; `ORC-JB5BUJUOKL` |  |
| RuSi | [RuSi](https://data.orchid-project.org/compounds/RuSi.html) | -57.7 kJ/mol-atom ± 1.4 | 1505 | experimental | -62.629 (mp-aaaaaahh) | -61.662 (oqmd-14277) | [2] Long 2009; _cites Perring 1997_ [doi](https://doi.org/10.1016/s0040-6031%2897%2900041-5) | Table 1, p. 2, row 5; `ORC-GZGM2OQUYO` |  |
| RuSi | [RuSi](https://data.orchid-project.org/compounds/RuSi.html) | -57.7 kJ/mol-atom ± 1.4 | 1505 | experimental | -62.629 (mp-aaaaaahh) | -61.662 (oqmd-14277) | [1] Liu 2001; _cites Perring 1997_ [doi](https://doi.org/10.1016/s0040-6031%2897%2900041-5) | Table 1, p. 2, row 2; `ORC-STGXWO3THX` |  |
| RuSi | [RuSi](https://data.orchid-project.org/compounds/RuSi.html) | -57.641 kJ/mol-atom | 298.15 | model | -62.629 (mp-aaaaaahh) | -61.662 (oqmd-14277) | [2] Long 2009 | Table 1, p. 2, row 10; `ORC-3IXLGVOQ6Z` |  |
| RuSi | [RuSi](https://data.orchid-project.org/compounds/RuSi.html) | -56.5 kJ/mol-atom | 298.15 | experimental | -62.629 (mp-aaaaaahh) | -61.662 (oqmd-14277) | [1] Liu 2001; _cites Kuntz 1997_ [doi](https://doi.org/10.1006/jssc.1997.7508) | Table 1, p. 2, row 3; `ORC-YBNIV6Y7FX` |  |
| RuSi | [RuSi](https://data.orchid-project.org/compounds/RuSi.html) | -56.454 kJ/mol-atom | 298.15 | model | -62.629 (mp-aaaaaahh) | -61.662 (oqmd-14277) | [2] Long 2009; _cites Liu 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2900931-8) | Table 1, p. 2, row 9; `ORC-ICSUDGKIN5` |  |
| RuSi | [RuSi](https://data.orchid-project.org/compounds/RuSi.html) | -56.454 kJ/mol-atom |  | model | -62.629 (mp-aaaaaahh) | -61.662 (oqmd-14277) | [1] Liu 2001 | Table 1, p. 2, row 12; `ORC-KQTZKB653I` |  |
| RuSi | [RuSi](https://data.orchid-project.org/compounds/RuSi.html) | -52.988 kJ/mol-atom | 298.15 | model | -62.629 (mp-aaaaaahh) | -61.662 (oqmd-14277) | [2] Long 2009; _cites Du 2001_ | Table 1, p. 2, row 8; `ORC-ZMCC6QMOKX` |  |
| RuSi | [RuSi](https://data.orchid-project.org/compounds/RuSi.html) | -43.9 kJ/mol-atom |  | model | -62.629 (mp-aaaaaahh) | -61.662 (oqmd-14277) | [1] Liu 2001; _cites Pasturel 1984_ | Table 1, p. 2, row 6; `ORC-RXKJTAQATI` |  |
| RuSi | [RuSi](https://data.orchid-project.org/compounds/RuSi.html) | -42 kJ/mol-atom |  | model | -62.629 (mp-aaaaaahh) | -61.662 (oqmd-14277) | [1] Liu 2001; _cites Chart 1973_ | Table 1, p. 2, row 10; `ORC-SUMEBNAEIC` |  |
| RuSi | [RuSi](https://data.orchid-project.org/compounds/RuSi.html) | -39.2 kJ/mol-atom |  | model | -62.629 (mp-aaaaaahh) | -61.662 (oqmd-14277) | [1] Liu 2001; _cites Machlin 1981_ [doi](https://doi.org/10.1016/0364-5916%2881%2990013-4) | Table 1, p. 2, row 8; `ORC-MELN6QBWZM` |  |
| RuSi | [RuSi](https://data.orchid-project.org/compounds/RuSi.html) | -33.4 kJ/mol-atom | 298.15 | experimental | -62.629 (mp-aaaaaahh) | -61.662 (oqmd-14277) | [1] Liu 2001; _cites Pretorius 1978_ [doi](https://doi.org/10.1016/0038-1101%2878%2990335-0) | Table 1, p. 2, row 9; `ORC-I7HZ5XJOMT` |  |
| RuSi | [RuSi](https://data.orchid-project.org/compounds/RuSi.html) | -33.4 kJ/mol-atom |  | model | -62.629 (mp-aaaaaahh) | -61.662 (oqmd-14277) | [1] Liu 2001; _cites Searcy 1962_ | Table 1, p. 2, row 11; `ORC-XGFBWWXFXY` |  |
| RuSi | [RuSi](https://data.orchid-project.org/compounds/RuSi.html) | -33.2 kJ/mol-atom |  | model | -62.629 (mp-aaaaaahh) | -61.662 (oqmd-14277) | [1] Liu 2001; _cites Petersson 1982_ [doi](https://doi.org/10.1063/1.331319) | Table 1, p. 2, row 7; `ORC-KDF54H5FFX` |  |
| RuSi | [RuSi](https://data.orchid-project.org/compounds/RuSi.html) | -32 kJ/mol-atom |  | model | -62.629 (mp-aaaaaahh) | -61.662 (oqmd-14277) | [1] Liu 2001; _cites F 1988_ | Table 1, p. 2, row 5; `ORC-ASPW3P4MXT` |  |

## Other properties

### Phase transition (1)

Table: Phase transition, Ru–Si system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase transition | 1235 K | 1235 | other | experimental | [2] Long 2009; _cites Ivanenko 2002_ [doi](https://doi.org/10.1016/s0022-0248%2801%2902381-8) | p. 1; `ORC-7NTKIJKGZ4` | “Recently, a new phase, RuSi2 , has been observed in the form of inclusions in Ru2 Si3 single crystals and formed peritectoidally at 1235 K \[20\].” |

## Sources

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

1. Y.Q. Liu, G. Shao, K.P. Homewood, Thermodynamic assessment of the Ru–Si and Os–Si systems, Journal of Alloys and Compounds 320, 72-79 (2001). [doi:10.1016/s0925-8388(01)00931-8](https://doi.org/10.1016/s0925-8388%2801%2900931-8)
2. Z.H. Long, H.S. Liu, Z.P. Jin, Thermodynamic description of Ru–Ge–Si ternary system, Journal of Alloys and Compounds 479, 262-267 (2009). [doi:10.1016/j.jallcom.2009.01.079](https://doi.org/10.1016/j.jallcom.2009.01.079)

## 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/).