Ca–Ni system

15 accepted literature values from 1 paper(s) (experimental 6, model 9); 1 calculated phase diagram(s).

Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (8) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	6
model	9

Accepted values by property group
Property group	Values
invariant reaction	12
formation	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
CaNi-05Isl.tdb	F. Islam, M. Medraj, Calphad, 29, 289-302(2005). doi:10.1016/j.calphad.2005.08.006	`d411c40b677aa318ddc83a135e92500a4408f7bb1c3b1b127c0dc5c8d6d03b89`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
CaNi-05Isl.tdb	1447.94	CANI5_D2D (x(Ni) 0.83333) + LIQUID (x(Ni) 0.87208) + FCC_A1 (x(Ni) 0.9992)
CaNi-05Isl.tdb	1447.94	CANI5_D2D (x(Ni) 0.83333) + LIQUID (x(Ni) 0.87215) + FCC_A1 (x(Ni) 0.9992)
CaNi-05Isl.tdb	1376.06	LIQUID (x(Ni) 0.70534) + CA2NI7 (x(Ni) 0.77778) + CANI5_D2D (x(Ni) 0.83333)
CaNi-05Isl.tdb	1376.06	LIQUID (x(Ni) 0.70539) + CA2NI7 (x(Ni) 0.77778) + CANI5_D2D (x(Ni) 0.83333)
CaNi-05Isl.tdb	1252.09	LIQUID (x(Ni) 0.54313) + CANI3 (x(Ni) 0.75) + CA2NI7 (x(Ni) 0.77778)
CaNi-05Isl.tdb	1252.09	LIQUID (x(Ni) 0.54326) + CANI3 (x(Ni) 0.75) + CA2NI7 (x(Ni) 0.77778)
CaNi-05Isl.tdb	1252.09	LIQUID (x(Ni) 0.54309) + CANI3 (x(Ni) 0.75) + CA2NI7 (x(Ni) 0.77778)
CaNi-05Isl.tdb	1119.79	LIQUID (x(Ni) 0.36072) + CANI2_C15 (x(Ni) 0.66667) + CANI3 (x(Ni) 0.75)
CaNi-05Isl.tdb	1119.79	LIQUID (x(Ni) 0.36096) + CANI2_C15 (x(Ni) 0.66667) + CANI3 (x(Ni) 0.75)
CaNi-05Isl.tdb	1119.79	LIQUID (x(Ni) 0.36062) + CANI2_C15 (x(Ni) 0.66667) + CANI3 (x(Ni) 0.75)
CaNi-05Isl.tdb	899.6	BCC_A2 (x(Ni) 1.600e-4) + LIQUID (x(Ni) 0.18042) + CANI2_C15 (x(Ni) 0.66667)
CaNi-05Isl.tdb	899.6	BCC_A2 (x(Ni) 1.600e-4) + LIQUID (x(Ni) 0.18011) + CANI2_C15 (x(Ni) 0.66667)
CaNi-05Isl.tdb	716.15	BCC_A2 (x(Ni) 1.000e-5) + FCC_A1 (x(Ni) 4.000e-5) + CANI2_C15 (x(Ni) 0.66667)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Ca–Ni system (12)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1478.9	congruent melting: Liquid -> CaNi5	L: Ni 0.834; CaNi5: Ca 0.166667, Ni 0.833333	model	[1] Islam 2005	Table 5, p. 8, row 12 report
1477.3	congruent melting: Liquid -> CaNi5	L: Ni 0.832; CaNi5: Ca 0.166667, Ni 0.833333	experimental	[1] Islam 2005 cites Notin 1990 doi	Table 5, p. 8, row 11 report
1460.1	eutectic: Liquid -> Ni-fcc + CaNi5	L: Ni 0.877; CaNi5: Ca 0.166667, Ni 0.833333	model	[1] Islam 2005	Table 5, p. 8, row 4 report
1459	eutectic: Liquid -> Ni-fcc + CaNi5	L: Ni 0.88; CaNi5: Ca 0.166667, Ni 0.833333	experimental	[1] Islam 2005 cites Notin 1990 doi	Table 5, p. 8, row 3 report
1400.2	peritectic: Liquid + CaNi5 -> Ca2Ni7	L: Ni 0.715; CaNi5: Ca 0.166667, Ni 0.833333; Ca2Ni7: Ca 0.222222, Ni 0.777778	model	[1] Islam 2005	Table 5, p. 8, row 10 report
1400.1	peritectic: Liquid + CaNi5 -> Ca2Ni7	L: Ni 0.715; CaNi5: Ca 0.166667, Ni 0.833333; Ca2Ni7: Ca 0.222222, Ni 0.777778	experimental	[1] Islam 2005 cites Notin 1990 doi	Table 5, p. 8, row 9 report
1287.2	peritectic: Liquid + Ca2Ni7 -> CaNi3	L: Ni 0.541; Ca2Ni7: Ca 0.222222, Ni 0.777778; CaNi3: Ca 0.25, Ni 0.75	experimental	[1] Islam 2005 cites Notin 1990 doi	Table 5, p. 8, row 7 report
1280.1	peritectic: Liquid + Ca2Ni7 -> CaNi3	L: Ni 0.561; Ca2Ni7: Ca 0.222222, Ni 0.777778; CaNi3: Ca 0.25, Ni 0.75	model	[1] Islam 2005	Table 5, p. 8, row 8 report
1145	peritectic: Liquid + CaNi3 -> CaNi2	L: Ni 0.378; CaNi3: Ca 0.25, Ni 0.75; CaNi2: Ca 0.333333, Ni 0.666667	model	[1] Islam 2005	Table 5, p. 8, row 6 report
1138.6	peritectic: Liquid + CaNi3 -> CaNi2	L: Ni 0.39; CaNi3: Ca 0.25, Ni 0.75; CaNi2: Ca 0.333333, Ni 0.666667	experimental	[1] Islam 2005 cites Notin 1990 doi	Table 5, p. 8, row 5 report
900	eutectic: Liquid -> Ca-bcc + CaNi2	L: Ni 0.17; CaNi2: Ca 0.333333, Ni 0.666667	model	[1] Islam 2005	Table 5, p. 8, row 2 report
896	eutectic: Liquid -> Ca-bcc + CaNi2	L: Ni 0.16; CaNi2: Ca 0.333333, Ni 0.666667	experimental	[1] Islam 2005 cites Notin 1990 doi	Table 5, p. 8, row 1 report

Other properties

Formation (3)

Formation, Ca–Ni system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Gibbs energy of formation printed: ΔGf	-6.59501 kJ/mol-atom	1050	CaNi2 alloy: Ni 0.666667	model	[1] Islam 2005	Table 7, p. 11, row 1 report
Gibbs energy of formation printed: ΔGf	-6.48746 kJ/mol-atom	1200	CaNi2 alloy: Ni 0.666667	model	[1] Islam 2005	Table 7, p. 11, row 5 report
Gibbs energy of formation printed: ΔGf	-6.37991 kJ/mol-atom	1350	CaNi2 alloy: Ni 0.666667	model	[1] Islam 2005	Table 7, p. 11, row 9 report

Sources

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

F. Islam, M. Medraj, The phase equilibria in the Mg–Ni–Ca system, Calphad 29, 289-302 (2005). doi:10.1016/j.calphad.2005.08.006

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}
}