Nb–Zn system

30 accepted literature values from 1 paper(s) (model 20, DFT 3, unspecified 7); 1 calculated phase diagram(s). 1 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
model	20
DFT	3
unspecified	7

Accepted values by property group
Property group	Values
invariant reaction	14
formation	6
crystal structure	10

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
NbZn-16Lon.tdb	Z. Long, J. Gong, J. Ding, C. Tang, Z. Li, F. Yin, J. Phase Equilib. Diffus., 37, 293-300(2016). doi:10.1007/s11669-016-0457-z	`4ba787a0409d8de085e0074748c04d44485e2867c2aefcf6e6846456e55338a3`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
NbZn-16Lon.tdb	1393.73	BCC_A2 (x(Zn) 4.000e-5) + NBZN (x(Zn) 0.5) + LIQUID (x(Zn) 0.96588)
NbZn-16Lon.tdb	1393.73	BCC_A2 (x(Zn) 4.000e-5) + NBZN (x(Zn) 0.5) + LIQUID (x(Zn) 0.96584)
NbZn-16Lon.tdb	1393.73	BCC_A2 (x(Zn) 4.000e-5) + NBZN (x(Zn) 0.5) + LIQUID (x(Zn) 0.96584)
NbZn-16Lon.tdb	1387.75	NBZN (x(Zn) 0.5) + NB2ZN3_D85 (x(Zn) 0.6) + LIQUID (x(Zn) 0.96713)
NbZn-16Lon.tdb	1387.75	NBZN (x(Zn) 0.5) + NB2ZN3_D85 (x(Zn) 0.6) + LIQUID (x(Zn) 0.96713)
NbZn-16Lon.tdb	1328.33	NB2ZN3_D85 (x(Zn) 0.6) + NBZN2_C36 (x(Zn) 0.66667) + LIQUID (x(Zn) 0.97926)
NbZn-16Lon.tdb	1328.33	NB2ZN3_D85 (x(Zn) 0.6) + NBZN2_C36 (x(Zn) 0.66667) + LIQUID (x(Zn) 0.97929)
NbZn-16Lon.tdb	1328.33	NB2ZN3_D85 (x(Zn) 0.6) + NBZN2_C36 (x(Zn) 0.66667) + LIQUID (x(Zn) 0.97924)
NbZn-16Lon.tdb	1307.05	NBZN2_C36 (x(Zn) 0.66667) + NBZN3_L12 (x(Zn) 0.75) + LIQUID (x(Zn) 0.98294)
NbZn-16Lon.tdb	1307.05	NBZN2_C36 (x(Zn) 0.66667) + NBZN3_L12 (x(Zn) 0.75) + LIQUID (x(Zn) 0.98296)
NbZn-16Lon.tdb	1307.05	NBZN2_C36 (x(Zn) 0.66667) + NBZN3_L12 (x(Zn) 0.75) + LIQUID (x(Zn) 0.98289)
NbZn-16Lon.tdb	750.27	NBZN3_L12 (x(Zn) 0.75) + NBZN7 (x(Zn) 0.875) + LIQUID (x(Zn) 1)
NbZn-16Lon.tdb	750.27	NBZN3_L12 (x(Zn) 0.75) + NBZN7 (x(Zn) 0.875) + LIQUID (x(Zn) 1)
NbZn-16Lon.tdb	701.54	NBZN7 (x(Zn) 0.875) + NBZN15 (x(Zn) 0.9375) + LIQUID (x(Zn) 1)
NbZn-16Lon.tdb	692.73	NBZN15 (x(Zn) 0.9375) + HCP_A3 (x(Zn) 0.9999) + LIQUID (x(Zn) 1)
NbZn-16Lon.tdb	692.73	NBZN15 (x(Zn) 0.9375) + HCP_A3 (x(Zn) 0.9999) + LIQUID (x(Zn) 1)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Nb–Zn system (14)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1394	peritectic: L + (Nb) -> NbZn	L: Zn 0.9658; NbZn: Nb 0.5, Zn 0.5	model	[1] Long 2016	Table 3, p. 5, row 14 report
1393	peritectic: L + (Nb) -> NbZn	L: Zn 0.9839; NbZn: Nb 0.5, Zn 0.5	unspecified	[1] Long 2016 cites Meussner 1965	Table 3, p. 5, row 13 report
1388	peritectic: L + NbZn -> NbZn1.5	L: Zn 0.9671; NbZn: Nb 0.5, Zn 0.5; NbZn1.5: Nb 0.4, Zn 0.6	model	[1] Long 2016	Table 3, p. 5, row 12 report
1387	peritectic: L + NbZn -> NbZn1.5	L: Zn 0.9848; NbZn: Nb 0.5, Zn 0.5; NbZn1.5: Nb 0.4, Zn 0.6	unspecified	[1] Long 2016 cites Meussner 1965	Table 3, p. 5, row 11 report
1328	peritectic: L + NbZn1.5 -> NbZn2	L: Zn 0.9793; NbZn1.5: Nb 0.4, Zn 0.6; NbZn2: Nb 0.333333, Zn 0.666667	model	[1] Long 2016	Table 3, p. 5, row 10 report
1327	peritectic: L + NbZn1.5 -> NbZn2	L: Zn 0.9894; NbZn1.5: Nb 0.4, Zn 0.6; NbZn2: Nb 0.333333, Zn 0.666667	unspecified	[1] Long 2016 cites Meussner 1965	Table 3, p. 5, row 9 report
1307	peritectic: L + NbZn2 -> NbZn3	L: Zn 0.9905; NbZn2: Nb 0.333333, Zn 0.666667; NbZn3: Nb 0.25, Zn 0.75	unspecified	[1] Long 2016 cites Meussner 1965	Table 3, p. 5, row 7 report
1307	peritectic: L + NbZn2 -> NbZn3	L: Zn 0.9829; NbZn2: Nb 0.333333, Zn 0.666667; NbZn3: Nb 0.25, Zn 0.75	model	[1] Long 2016	Table 3, p. 5, row 8 report
751	peritectic: L + NbZn3 -> NbZn7	L: Zn 0.9995; NbZn3: Nb 0.25, Zn 0.75; NbZn7: Nb 0.125, Zn 0.875	unspecified	[1] Long 2016 cites Meussner 1965	Table 3, p. 5, row 5 report
750	peritectic: L + NbZn3 -> NbZn7	L: Zn 0.9999; NbZn3: Nb 0.25, Zn 0.75; NbZn7: Nb 0.125, Zn 0.875	model	[1] Long 2016	Table 3, p. 5, row 6 report
702	peritectic: L + NbZn7 -> NbZn15	L: Zn 0.9998; NbZn7: Nb 0.125, Zn 0.875; NbZn15: Nb 0.0625, Zn 0.9375	unspecified	[1] Long 2016 cites Meussner 1965	Table 3, p. 5, row 3 report
701	peritectic: L + NbZn7 -> NbZn15	L: Zn 0.9999; NbZn7: Nb 0.125, Zn 0.875; NbZn15: Nb 0.0625, Zn 0.9375	model	[1] Long 2016	Table 3, p. 5, row 4 report
693	eutectic: L -> (Zn) + NbZn15	L: Zn 0.9999; NbZn15: Nb 0.0625, Zn 0.9375	model	[1] Long 2016	Table 3, p. 5, row 2 report
691	eutectic: L -> (Zn) + NbZn15	L: Zn 0.9999; NbZn15: Nb 0.0625, Zn 0.9375	unspecified	[1] Long 2016 cites Meussner 1965	Table 3, p. 5, row 1 report

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.

Enthalpies of formation, Nb–Zn system (6)
Phase	Value	Class	Source	Location
NbZn15	-3.637 kJ/mol (basis unstated)	DFT	[1] Long 2016	Table 1, p. 3, row 5 report
NbZn15	-3.636 kJ/mol (basis unstated)	model	[1] Long 2016	Table 1, p. 3, row 5 report
NbZn2	-15.236 kJ/mol (basis unstated)	DFT	[1] Long 2016	Table 1, p. 3, row 1 report
NbZn2	-15.233 kJ/mol (basis unstated)	model	[1] Long 2016	Table 1, p. 3, row 1 report
NbZn3	-15.192 kJ/mol (basis unstated)	DFT	[1] Long 2016	Table 1, p. 3, row 3 report
NbZn3	-13.57 kJ/mol (basis unstated)	model	[1] Long 2016	Table 1, p. 3, row 3 report

Other properties

Crystal structure (10)

Crystal structure, Nb–Zn system
Property	Value	Phases / composition	Class	Source	Location
Lattice a printed: a	7.696 Å	NbZn15 alloy: Zn 0.9375	model	[1] Long 2016 cites Nasch 1999 doi	Table 1, p. 3, row 6 report
Lattice a printed: a	7.737 Å	NbZn15 alloy: Zn 0.9375	model	[1] Long 2016	Table 1, p. 3, row 5 report
Lattice a printed: a	5.068 Å	NbZn2 alloy: Zn 0.666667	model	[1] Long 2016	Table 1, p. 3, row 1 report
Lattice a printed: a	5.05 Å	NbZn2 alloy: Zn 0.666667	model	[1] Long 2016 cites Vold 1961 doi	Table 1, p. 3, row 2 report
Lattice a printed: a	3.933 Å	NbZn3 alloy: Zn 0.75	model	[1] Long 2016 cites Nasch 1999 doi	Table 1, p. 3, row 4 report
Lattice a printed: a	3.944 Å	NbZn3 alloy: Zn 0.75	model	[1] Long 2016	Table 1, p. 3, row 3 report
Lattice c printed: c	11.663 Å	NbZn15 alloy: Zn 0.9375	model	[1] Long 2016 cites Nasch 1999 doi	Table 1, p. 3, row 6 report
Lattice c printed: c	11.627 Å	NbZn15 alloy: Zn 0.9375	model	[1] Long 2016	Table 1, p. 3, row 5 report
Lattice c printed: c	16.356 Å	NbZn2 alloy: Zn 0.666667	model	[1] Long 2016	Table 1, p. 3, row 1 report
Lattice c printed: c	16.32 Å	NbZn2 alloy: Zn 0.666667	model	[1] Long 2016 cites Vold 1961 doi	Table 1, p. 3, row 2 report

Sources

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

Zhaohui Long, Jin Gong, Jing Ding, Chihua Tang, Zhi Li, Fucheng Yin, Thermodynamic Assessment of Zn-Fe-Nb Ternary System, J. Phase Equilib. Diffus. 37, 293-300 (2016). doi:10.1007/s11669-016-0457-z

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}
}