Nd–Ti system

27 accepted literature values from 1 paper(s) (experimental 10, model 6, unspecified 11); 1 calculated phase diagram(s). 3 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 (5) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	10
model	6
unspecified	11

Accepted values by property group
Property group	Values
invariant reaction	8
phase transition	2
phase equilibrium	5
crystal structure	12

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
NdTi-14Mat.tdb	N. Mattern, Y. Yokoyama, A. Mizuno, J.H. Han, O. Fabrichnaya, T. Harada, S. Kohara, J. Eckert, Calphad, 47, 136-43(2014). doi:10.1016/j.calphad.2014.08.002	`92541b455dbef5e9f5b551fb8b4b36845d3d15ec0df645532b3270470de4e160`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
NdTi-14Mat.tdb	1821.17	LIQUID (x(Ti) 0.08949) + LIQUID#2 (x(Ti) 0.92786) + BCC_A2 (x(Ti) 0.99694)
NdTi-14Mat.tdb	1285.72	BCC_A2 (x(Ti) 0.0014) + LIQUID (x(Ti) 0.00314) + BCC_A2#2 (x(Ti) 0.99933)
NdTi-14Mat.tdb	1162.96	BCC_A2#2 (x(Ti) 8.000e-4) + HCP_A3 (x(Ti) 0.99663) + BCC_A2 (x(Ti) 0.99965)
NdTi-14Mat.tdb	1126.92	DHCP (x(Ti) 3.400e-4) + BCC_A2 (x(Ti) 6.500e-4) + HCP_A3 (x(Ti) 0.99695)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Nd–Ti system (8)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1840	monotectic: L2 -> L1 + bcc-Ti		experimental	[1] Mattern 2014	Table 5, p. 7, row 2 report
1821	monotectic: L2 -> L1 + bcc-Ti	L2: Ti 0.9278; L1: Ti 0.0896; bcc-Ti: Ti 0.9969	model	[1] Mattern 2014	Table 5, p. 7, row 1 report
1286	eutectic: L1 -> bcc-Nd + bcc-Ti	L1: Ti 0.0031; bcc-Nd: Ti 0.0014; bcc-Ti: Ti 0.9993	model	[1] Mattern 2014	Table 5, p. 7, row 3 report
1278	eutectic: L1 -> bcc-Nd + bcc-Ti		experimental	[1] Mattern 2014	Table 5, p. 7, row 4 report
1163	bcc-Nd + bcc-Ti -> hcp-Ti	bcc-Nd: Ti 8.000e-4; bcc-Ti: Ti 0.9996; hcp-Ti: Ti 0.9966	model	[1] Mattern 2014	Table 5, p. 7, row 5 report
1160	bcc-Nd + bcc-Ti -> hcp-Ti		experimental	[1] Mattern 2014	Table 5, p. 7, row 6 report
1127	bcc-Nd -> dhcp-Nd + hcp-Ti	bcc-Nd: Ti 7.000e-4; dhcp-Nd: Ti 3.000e-4; hcp-Ti: Ti 0.9969	model	[1] Mattern 2014	Table 5, p. 7, row 7 report
1126	bcc-Nd -> dhcp-Nd + hcp-Ti		experimental	[1] Mattern 2014	Table 5, p. 7, row 8 report

Other properties

Phase transition (2)

Phase transition, Nd–Ti system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase transition	1140 K	1140	polymorphic: dhcp-Nd alloy: Ti 0	model	[1] Mattern 2014 cites Murray 1987	Table 1, p. 3, row 2 report
Phase transition	1294 K	1294	congruent transformation: bcc-Nd alloy: Ti 0	model	[1] Mattern 2014 cites Murray 1987	Table 1, p. 3, row 1 report

Phase equilibrium (5)

Phase equilibrium, Nd–Ti system
Property	Phases / composition	Class	Source	Location
Phase composition	L1 + L2 + e1 L1: Nd 0.896, Ti 0.104; L2: Nd 0.099, Ti 0.901; e1: Nd 0.982, Ti 0.018	experimental	[1] Mattern 2014	Table 3, p. 6, row 4 report
Phase composition	L1 + L2 + e1 + Nd + Ti L1: Nd 0.931, Ti 0.069; L2: Nd 0.091, Ti 0.909; e1: Nd 0.985, Ti 0.015; Nd: Nd 0.994, Ti 0.006; Ti: Nd 0.001, Ti 0.999	experimental	[1] Mattern 2014	Table 3, p. 6, row 2 report
Phase composition	L1 + L2 + e1 + Nd + Ti L1: Nd 0.932, Ti 0.068; L2: Nd 0.089, Ti 0.911; e1: Nd 0.985, Ti 0.015; Nd: Nd 0.995, Ti 0.005; Ti: Nd 0.002, Ti 0.998	experimental	[1] Mattern 2014	Table 3, p. 6, row 3 report
Phase composition	L2 + Ti L2: Nd 0.108, Ti 0.892; Ti: Nd 0.003, Ti 0.997	experimental	[1] Mattern 2014	Table 3, p. 6, row 5 report
Phase composition	e1 + Nd e1: Nd 0.987, Ti 0.013; Nd: Nd 0.996, Ti 0.004	experimental	[1] Mattern 2014	Table 3, p. 6, row 1 report

Crystal structure (12)

Crystal structure, Nd–Ti system
Property	Value	Phases / composition	Class	Source	Location
Lattice a	3.655 Å ± 0.001	dhcp-Nd alloy: Nd 0.4, Ti 0.6	unspecified	[1] Mattern 2014	Table 2, p. 5, row 6 report
Lattice a	3.658 Å ± 0.001	dhcp-Nd alloy: Nd 0.6, Ti 0.4	unspecified	[1] Mattern 2014	Table 2, p. 5, row 4 report
Lattice a	3.658 Å ± 0.001	dhcp-Nd alloy: Nd 0.8, Ti 0.2	unspecified	[1] Mattern 2014	Table 2, p. 5, row 2 report
Lattice a	2.952 Å ± 0.001	hcp-Ti alloy: Nd 0.8, Ti 0.2	unspecified	[1] Mattern 2014	Table 2, p. 5, row 3 report
Lattice a	2.951 Å ± 0.001	hcp-Ti alloy: Nd 0.4, Ti 0.6	unspecified	[1] Mattern 2014	Table 2, p. 5, row 7 report
Lattice a	2.949 Å ± 0.001	hcp-Ti alloy: Nd 0.6, Ti 0.4	unspecified	[1] Mattern 2014	Table 2, p. 5, row 5 report
Lattice c	11.77 Å ± 0.01	dhcp-Nd alloy: Nd 0.4, Ti 0.6	unspecified	[1] Mattern 2014	Table 2, p. 5, row 6 report
Lattice c	11.78 Å ± 0.01	dhcp-Nd alloy: Nd 0.6, Ti 0.4	unspecified	[1] Mattern 2014	Table 2, p. 5, row 4 report
Lattice c	11.78 Å ± 0.01	dhcp-Nd alloy: Nd 0.8, Ti 0.2	unspecified	[1] Mattern 2014	Table 2, p. 5, row 2 report
Lattice c	4.691 Å ± 0.002	hcp-Ti alloy: Nd 0.8, Ti 0.2	unspecified	[1] Mattern 2014	Table 2, p. 5, row 3 report
Lattice c	4.687 Å ± 0.002	hcp-Ti alloy: Nd 0.4, Ti 0.6	unspecified	[1] Mattern 2014	Table 2, p. 5, row 7 report
Lattice c	4.688 Å ± 0.002	hcp-Ti alloy: Nd 0.6, Ti 0.4	experimental	[1] Mattern 2014	Table 2, p. 5, row 5 report

Sources

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

N. Mattern, Y. Yokoyama, A. Mizuno, J.H. Han, O. Fabrichnaya, T. Harada et al., Experimental and thermodynamic assessment of the Nd–Ti system, Calphad 47, 136-143 (2014). doi:10.1016/j.calphad.2014.08.002

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}
}