Gd–Si system

22 accepted literature values from 2 paper(s) (experimental 15, model 7); 1 calculated phase diagram(s). 7 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV.

Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (10) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	15
model	7

Accepted values by property group
Property group	Values
invariant reaction	21
phase transition	1

Calculated phase diagrams

Binary phase diagrams calculated with pycalphad 0.11.2 from the SGTE binary collection (Hallstedt 2025, CC BY 4.0). Evidence class: model.

Assessments with a calculated phase diagram
TDB file	Assessment	SHA-256	Links
GdSi-07Hua.tdb	M. Huang, D.L. Schlagel, F.A. Schmidt, T.A. Lograsso, J. Alloys Compd., 441, 94-100(2007). doi:10.1016/j.jallcom.2006.09.068	`e9d1c9c91a440a0c4a1d36bebc6f7cc2b36ade4b4a7d445a31c22c966bc935b4`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
GdSi-07Hua.tdb	2045.62	LIQUID (x(Si) 0.40677) + GD5SI4 (x(Si) 0.44444) + GDSI_B27 (x(Si) 0.5)
GdSi-07Hua.tdb	2045.61	LIQUID (x(Si) 0.40641) + GD5SI4 (x(Si) 0.44444) + GDSI_B27 (x(Si) 0.5)
GdSi-07Hua.tdb	2045.61	LIQUID (x(Si) 0.4063) + GD5SI4 (x(Si) 0.44444) + GDSI_B27 (x(Si) 0.5)
GdSi-07Hua.tdb	2019.97	LIQUID (x(Si) 0.37447) + GD5SI3_D88 (x(Si) 0.375) + GD5SI4 (x(Si) 0.44444)
GdSi-07Hua.tdb	2019.97	LIQUID (x(Si) 0.3742) + GD5SI3_D88 (x(Si) 0.375) + GD5SI4 (x(Si) 0.44444)
GdSi-07Hua.tdb	2019.97	LIQUID (x(Si) 0.37454) + GD5SI3_D88 (x(Si) 0.375) + GD5SI4 (x(Si) 0.44444)
GdSi-07Hua.tdb	1936.19	GDSI_B27 (x(Si) 0.5) + GD3SI5_C32 (x(Si) 0.625) + LIQUID (x(Si) 0.64937)
GdSi-07Hua.tdb	1936.19	GDSI_B27 (x(Si) 0.5) + GD3SI5_C32 (x(Si) 0.625) + LIQUID (x(Si) 0.64907)
GdSi-07Hua.tdb	1874.01	GD3SI5_C32 (x(Si) 0.625) + GDSI2 (x(Si) 0.66667) + LIQUID (x(Si) 0.7166)
GdSi-07Hua.tdb	1874.01	GD3SI5_C32 (x(Si) 0.625) + GDSI2 (x(Si) 0.66667) + LIQUID (x(Si) 0.71616)
GdSi-07Hua.tdb	1874.01	GD3SI5_C32 (x(Si) 0.625) + GDSI2 (x(Si) 0.66667) + LIQUID (x(Si) 0.71666)
GdSi-07Hua.tdb	1508.16	HCP_A3 (x(Si) 0) + BCC_A2 (x(Si) 0) + LIQUID (x(Si) 0.02961)
GdSi-07Hua.tdb	1498.29	GDSI2 (x(Si) 0.66667) + LIQUID (x(Si) 0.86998) + DIAMOND_A4 (x(Si) 1)
GdSi-07Hua.tdb	1498.29	GDSI2 (x(Si) 0.66667) + LIQUID (x(Si) 0.87006) + DIAMOND_A4 (x(Si) 1)
GdSi-07Hua.tdb	1498.29	GDSI2 (x(Si) 0.66667) + LIQUID (x(Si) 0.87013) + DIAMOND_A4 (x(Si) 1)
GdSi-07Hua.tdb	1352.27	HCP_A3 (x(Si) 0) + LIQUID (x(Si) 0.0841) + GD5SI3_D88 (x(Si) 0.375)
GdSi-07Hua.tdb	1352.27	HCP_A3 (x(Si) 0) + LIQUID (x(Si) 0.08408) + GD5SI3_D88 (x(Si) 0.375)
GdSi-07Hua.tdb	1352.27	HCP_A3 (x(Si) 0) + LIQUID (x(Si) 0.08408) + GD5SI3_D88 (x(Si) 0.375)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Gd–Si system (21)
T (K)	Reaction / phases	Class	Source	Location
2108.15	congruent melting: Liquid -> GdSi	model	[1] Huang 2007	Table 2, p. 6, row 11 report
2108.15	congruent melting: Liquid -> GdSi	experimental	[1] Huang 2007	Table 2, p. 6, row 12 report
2103.15	congruent melting: Liquid -> GdSi	experimental	[1] Huang 2007 cites Eremenko 1991	Table 2, p. 6, row 13 report
2047.15	Liquid + GdSi -> Gd5Si4	model	[1] Huang 2007	Table 2, p. 6, row 8 report
2043.15	Liquid + GdSi -> Gd5Si4	experimental	[1] Huang 2007	Table 2, p. 6, row 9 report
2023.15	Liquid + Gd5Si4 -> Gd5Si3	experimental	[1] Huang 2007	Table 2, p. 6, row 6 report
2021.15	Liquid + Gd5Si4 -> Gd5Si3	model	[1] Huang 2007	Table 2, p. 6, row 5 report
1998.15	Liquid + GdSi -> Gd5Si4	experimental	[1] Huang 2007 cites Eremenko 1991	Table 2, p. 6, row 10 report
1973.15	Liquid + Gd5Si4 -> Gd5Si3	experimental	[1] Huang 2007 cites Eremenko 1991	Table 2, p. 6, row 7 report
1938.15	Liquid + GdSi -> Gd3Si5	experimental	[1] Huang 2007	Table 2, p. 6, row 15 report
1937.15	Liquid + GdSi -> Gd3Si5	model	[1] Huang 2007	Table 2, p. 6, row 14 report
1898.15	Liquid + GdSi -> Gd3Si5	experimental	[1] Huang 2007 cites Eremenko 1991	Table 2, p. 6, row 16 report
1874.15	Liquid + Gd3Si5 -> GdSi2-x	model	[1] Huang 2007	Table 2, p. 6, row 17 report
1873.15	Liquid + Gd3Si5 -> GdSi2-x	experimental	[1] Huang 2007	Table 2, p. 6, row 18 report
1863.15	Liquid + Gd3Si5 -> GdSi2-x	experimental	[1] Huang 2007 cites Eremenko 1991	Table 2, p. 6, row 19 report
1503.15	Liquid + GdSi2-x -> diamond (Si)	experimental	[1] Huang 2007 cites Eremenko 1991	Table 2, p. 6, row 22 report
1500.15	Liquid + GdSi2-x -> diamond (Si)	experimental	[1] Huang 2007	Table 2, p. 6, row 21 report
1499.15	Liquid + GdSi2-x -> diamond (Si)	model	[1] Huang 2007	Table 2, p. 6, row 20 report
1361.15	eutectic: Liquid -> Gd5Si3 + hcp (Gd)	experimental	[1] Huang 2007	Table 2, p. 6, row 3 report
1360.15	eutectic: Liquid -> Gd5Si3 + hcp (Gd)	model	[1] Huang 2007	Table 2, p. 6, row 2 report
1353.15	eutectic: Liquid -> Gd5Si3 + hcp (Gd)	experimental	[1] Huang 2007 cites Eremenko 1991	Table 2, p. 6, row 4 report

Other properties

Phase transition (1)

Phase transition, Gd–Si system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase transition	2003.15 K	2003.15	congruent transformation	experimental	[2] Xu 2020 cites ref. 18	p. 2 report	Bulanova et al18 reported that the α-GdSi2 structure formed at 1730°C by congruent reaction while the α-ThSi2 structure formed by peritectic reaction at about 1600°C.

Sources

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

Mianliang Huang, Deborah L. Schlagel, Frederick A. Schmidt, Thomas A. Lograsso, Experimental investigation and thermodynamic modeling of the Gd–Si system, Journal of Alloys and Compounds 441, 94-100 (2007). doi:10.1016/j.jallcom.2006.09.068
Kai Xu, Keke Chang, Xiaobing Zhou, Leilei Chen, Junwen Liu, Zixuan Deng et al., Thermodynamic descriptions of the light rare‐earth elements in silicon carbide ceramics, J Am Ceram Soc 103, 3812-3825 (2020). doi:10.1111/jace.17031

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). doi:10.5281/zenodo.23735569
R. Arróyave, J. Saal, D. Shin, ORCHID-Diagrams: calculated binary phase diagrams (version 2026.10), Zenodo (2026). doi: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). doi: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). doi: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.

@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}
}