Gd–Ti system

11 accepted literature values from 1 paper(s) (experimental 7, model 4); 1 calculated phase diagram(s). 2 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 (4) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	7
model	4

Accepted values by property group
Property group	Values
invariant reaction	8
phase equilibrium	3

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
GdTi-13Mat.tdb	N. Mattern, J.H. Han, O. Fabrichnaya, M. Zinkevich, W. Loser, J. Werner, R. Nowak, I. Kaban, O. Shuleshova, D. Holland-Moritz, J. Bednarcik, N. Sobczak, J. Eckert, Calphad, 42, 19-26(2013). doi:10.1016/j.calphad.2013.06.007	`464cda7b6953ecd85a29cb52ebe334e10a8cf0a4d679267c9fd201147e11e57a`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
GdTi-13Mat.tdb	1843.44	LIQUID (x(Ti) 0.24504) + LIQUID#2 (x(Ti) 0.9261) + BCC_A2 (x(Ti) 0.9894)
GdTi-13Mat.tdb	1509.24	BCC_A2 (x(Ti) 0.00581) + LIQUID (x(Ti) 0.04556) + BCC_A2#2 (x(Ti) 0.9917)
GdTi-13Mat.tdb	1489.94	HCP_A3 (x(Ti) 0.00201) + BCC_A2#2 (x(Ti) 0.00556) + BCC_A2 (x(Ti) 0.99204)
GdTi-13Mat.tdb	1150.39	HCP_A3 (x(Ti) 7.100e-4) + BCC_A2 (x(Ti) 0.9971) + HCP_A3#2 (x(Ti) 0.99887)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Gd–Ti system (8)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1842	monotectic: Monotectic e1: L1 -> L2+bcc-Ti(Gd)	L1: Ti 0.925; L2: Ti 0.25; bcc-Ti(Gd): Ti 0.99	model	[1] Mattern 2013	Table 1, p. 2, row 2 report
1841	monotectic: Monotectic e1: L1 -> L2+bcc-Ti(Gd)	L1: Ti 0.94; L2: Ti 0.24; bcc-Ti(Gd): Ti 0.995	experimental	[1] Mattern 2013	Table 1, p. 2, row 1 report
1508	eutectic: Eutectic e2: L -> bcc-Gd(Ti)+bcc-Ti(Gd)	L: Ti 0.08; bcc-Gd(Ti): Ti 0.005; bcc-Ti(Gd): Ti 0.998	experimental	[1] Mattern 2013	Table 1, p. 2, row 3 report
1508	eutectic: Eutectic e2: L -> bcc-Gd(Ti)+bcc-Ti(Gd)	L: Ti 0.046; bcc-Gd(Ti): Ti 0.992; bcc-Ti(Gd): Ti 0.006	model	[1] Mattern 2013	Table 1, p. 2, row 4 report
1490	eutectoid: Eutectoid e3: bcc-Gd(Ti) -> hcp-Gd(Ti)+bcc-Ti(Gd)	bcc-Gd(Ti): Ti 0.006; hcp-Gd(Ti): Ti 0.992; bcc-Ti(Gd): Ti 0.002	model	[1] Mattern 2013	Table 1, p. 2, row 6 report
1488	eutectoid: Eutectoid e3: bcc-Gd(Ti) -> hcp-Gd(Ti)+bcc-Ti(Gd)	bcc-Gd(Ti): Ti 0.004; hcp-Gd(Ti): Ti 0.001; bcc-Ti(Gd): Ti 0.998	experimental	[1] Mattern 2013	Table 1, p. 2, row 5 report
1150	eutectoid: Eutectoid e4: bcc-Ti(Gd) -> hcp-Gd(Ti)+hcp-Ti(Gd)	bcc-Ti(Gd): Ti 0.997; hcp-Gd(Ti): Ti 0.001; hcp-Ti(Gd): Ti 0.999	model	[1] Mattern 2013	Table 1, p. 2, row 8 report
1140	eutectoid: Eutectoid e4: bcc-Ti(Gd) -> hcp-Gd(Ti)+hcp-Ti(Gd)	bcc-Ti(Gd): Ti 0.998; hcp-Gd(Ti): Ti 0.001; hcp-Ti(Gd): Ti 0.999	experimental	[1] Mattern 2013	Table 1, p. 2, row 7 report

Other properties

Phase equilibrium (3)

Phase equilibrium, Gd–Ti system
Property	Phases / composition	Class	Source	Location
Phase composition	L1 + L2 + Gd + Ti + L₁ + L₂ L1: Gd 0.055, Ti 0.945; L2: Gd 0.74, Ti 0.26; Gd: Gd 0.998, Ti 0.002; Ti: Gd 0.005, Ti 0.995; L₁: Gd 0.055, Ti 0.945; L₂: Gd 0.74, Ti 0.26	experimental	[1] Mattern 2013	Table 2, p. 6, row 2 report
Phase composition	L1 + L2 + L + Gd + Ti L1: Gd 0.07, Ti 0.93; L2: Gd 0.78, Ti 0.22; L: Gd 0.914, Ti 0.086; Gd: Gd 0.998, Ti 0.002; Ti: Gd 0.004, Ti 0.996	experimental	[1] Mattern 2013	Table 2, p. 6, row 1 report
Phase composition	L1 + L2 + L + Gd + Ti L1: Gd 0.061, Ti 0.939; L2: Gd 0.75, Ti 0.25; L: Gd 0.923, Ti 0.077; Gd: Gd 0.997, Ti 0.003; Ti: Gd 0.004, Ti 0.996	experimental	[1] Mattern 2013	Table 2, p. 6, row 3 report

Sources

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

N. Mattern, J.H. Han, O. Fabrichnaya, M. Zinkevich, W. Löser, J. Werner et al., Experimental and thermodynamic assessment of the Gd–Ti system, Calphad 42, 19-26 (2013). doi:10.1016/j.calphad.2013.06.007

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}
}