Co–Nd system

38 accepted literature values from 1 paper(s) (experimental 21, model 16, unspecified 1); 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 (16) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	21
model	16
unspecified	1

Accepted values by property group
Property group	Values
invariant reaction	31
phase transition	7

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
CoNd-07Liu.tdb	X. Liu, Z. Du, C. Guo, C. Li, J. Alloys Compd., 439, 97-102(2007). doi:10.1016/j.jallcom.2006.08.081	`9a16a634620fd2a3e3e2f7f6b57448bd72c1b62f9c73f03979bd187ff6eab2b7`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
CoNd-07Liu.tdb	1578.98	FCC_A1 (x(Nd) 0.00242) + CO17ND2 (x(Nd) 0.10526) + LIQUID (x(Nd) 0.14783)
CoNd-07Liu.tdb	1578.98	FCC_A1 (x(Nd) 0.00242) + CO17ND2 (x(Nd) 0.10526) + LIQUID (x(Nd) 0.14768)
CoNd-07Liu.tdb	1538.27	CO17ND2 (x(Nd) 0.10526) + CO5ND_D2D (x(Nd) 0.16667) + LIQUID (x(Nd) 0.22271)
CoNd-07Liu.tdb	1538.27	CO17ND2 (x(Nd) 0.10526) + CO5ND_D2D (x(Nd) 0.16667) + LIQUID (x(Nd) 0.22277)
CoNd-07Liu.tdb	1538.27	CO17ND2 (x(Nd) 0.10526) + CO5ND_D2D (x(Nd) 0.16667) + LIQUID (x(Nd) 0.22276)
CoNd-07Liu.tdb	1538.27	CO17ND2 (x(Nd) 0.10526) + CO5ND_D2D (x(Nd) 0.16667) + LIQUID (x(Nd) 0.2226)
CoNd-07Liu.tdb	1424.57	CO5ND_D2D (x(Nd) 0.16667) + CO19ND5 (x(Nd) 0.20833) + LIQUID (x(Nd) 0.33522)
CoNd-07Liu.tdb	1424.57	CO5ND_D2D (x(Nd) 0.16667) + CO19ND5 (x(Nd) 0.20833) + LIQUID (x(Nd) 0.33505)
CoNd-07Liu.tdb	1424.57	CO5ND_D2D (x(Nd) 0.16667) + CO19ND5 (x(Nd) 0.20833) + LIQUID (x(Nd) 0.33527)
CoNd-07Liu.tdb	1415.73	CO19ND5 (x(Nd) 0.20833) + CO7ND2 (x(Nd) 0.22222) + LIQUID (x(Nd) 0.34207)
CoNd-07Liu.tdb	1415.73	CO19ND5 (x(Nd) 0.20833) + CO7ND2 (x(Nd) 0.22222) + LIQUID (x(Nd) 0.34201)
CoNd-07Liu.tdb	1415.73	CO19ND5 (x(Nd) 0.20833) + CO7ND2 (x(Nd) 0.22222) + LIQUID (x(Nd) 0.34222)
CoNd-07Liu.tdb	1373.07	CO7ND2 (x(Nd) 0.22222) + CO3ND (x(Nd) 0.25) + LIQUID (x(Nd) 0.37212)
CoNd-07Liu.tdb	1373.07	CO7ND2 (x(Nd) 0.22222) + CO3ND (x(Nd) 0.25) + LIQUID (x(Nd) 0.37201)
CoNd-07Liu.tdb	1373.07	CO7ND2 (x(Nd) 0.22222) + CO3ND (x(Nd) 0.25) + LIQUID (x(Nd) 0.37217)
CoNd-07Liu.tdb	1322.68	CO3ND (x(Nd) 0.25) + CO2ND_C15 (x(Nd) 0.33333) + LIQUID (x(Nd) 0.40349)
CoNd-07Liu.tdb	1322.68	CO3ND (x(Nd) 0.25) + CO2ND_C15 (x(Nd) 0.33333) + LIQUID (x(Nd) 0.40357)
CoNd-07Liu.tdb	1322.68	CO3ND (x(Nd) 0.25) + CO2ND_C15 (x(Nd) 0.33333) + LIQUID (x(Nd) 0.40328)
CoNd-07Liu.tdb	1127.95	LIQUID (x(Nd) 0.92476) + BCC_A2 (x(Nd) 0.99995) + DHCP (x(Nd) 0.99996)
CoNd-07Liu.tdb	1127.95	LIQUID (x(Nd) 0.92477) + BCC_A2 (x(Nd) 0.99995) + DHCP (x(Nd) 0.99996)
CoNd-07Liu.tdb	922.95	CO2ND_C15 (x(Nd) 0.33333) + CO3ND2_HT (x(Nd) 0.4) + LIQUID (x(Nd) 0.56831)
CoNd-07Liu.tdb	922.95	CO2ND_C15 (x(Nd) 0.33333) + CO3ND2_HT (x(Nd) 0.4) + LIQUID (x(Nd) 0.56835)
CoNd-07Liu.tdb	922.95	CO2ND_C15 (x(Nd) 0.33333) + CO3ND2_HT (x(Nd) 0.4) + LIQUID (x(Nd) 0.56826)
CoNd-07Liu.tdb	898.26	COND3_D011 (x(Nd) 0.75) + LIQUID (x(Nd) 0.80801) + DHCP (x(Nd) 0.99993)
CoNd-07Liu.tdb	898.26	COND3_D011 (x(Nd) 0.75) + LIQUID (x(Nd) 0.80794) + DHCP (x(Nd) 0.99993)
CoNd-07Liu.tdb	871.9	CO3ND2_HT (x(Nd) 0.4) + CO3ND4 (x(Nd) 0.57143) + LIQUID (x(Nd) 0.58601)
CoNd-07Liu.tdb	871.9	CO3ND2_HT (x(Nd) 0.4) + CO3ND4 (x(Nd) 0.57143) + LIQUID (x(Nd) 0.58571)
CoNd-07Liu.tdb	871.9	CO3ND2_HT (x(Nd) 0.4) + CO3ND4 (x(Nd) 0.57143) + LIQUID (x(Nd) 0.58605)
CoNd-07Liu.tdb	869.26	LIQUID (x(Nd) 0.6714) + CO2ND5 (x(Nd) 0.71429) + COND3_D011 (x(Nd) 0.75)
CoNd-07Liu.tdb	869.25	LIQUID (x(Nd) 0.67117) + CO2ND5 (x(Nd) 0.71429) + COND3_D011 (x(Nd) 0.75)
CoNd-07Liu.tdb	856.1	CO3ND2_HT (x(Nd) 0.4) + CO3ND2_LT (x(Nd) 0.4) + CO3ND4 (x(Nd) 0.57143)
CoNd-07Liu.tdb	856.1	CO2ND_C15 (x(Nd) 0.33333) + CO3ND2_LT (x(Nd) 0.4) + CO3ND2_HT (x(Nd) 0.4)
CoNd-07Liu.tdb	838.64	CO3ND4 (x(Nd) 0.57143) + LIQUID (x(Nd) 0.64004) + CO2ND5 (x(Nd) 0.71429)
CoNd-07Liu.tdb	838.64	CO3ND4 (x(Nd) 0.57143) + LIQUID (x(Nd) 0.63993) + CO2ND5 (x(Nd) 0.71429)
CoNd-07Liu.tdb	694.99	FCC_A1 (x(Nd) 0) + HCP_A3 (x(Nd) 0) + CO17ND2 (x(Nd) 0.10526)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Co–Nd system (31)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location	Quote
1579	liq. + fcc(Co) -> Co17Nd2	liq.: Nd 0.1477; fcc(Co): Nd 0.0024; Co17Nd2: Co 0.894737, Nd 0.105263	model	[1] Liu 2007	Table 3, p. 5, row 1 report
1579	liq. + fcc(Co) -> Co17Nd2	liq.: Nd 0.15; fcc(Co): Nd 0; Co17Nd2: Co 0.894737, Nd 0.105263	experimental	[1] Liu 2007 cites Okamoto 1993	Table 3, p. 5, row 2 report
1579	peritectic: liq. + fcc(Co) → Co17 Nd2		model	[1] Liu 2007	p. 5 report	In the present work, Co17 Nd2 is treated as being formed by peritectic reaction liq. + fcc(Co) → Co17 Nd2 , and the peritectic reaction temperature is set to be equal to the melting temperature of Co17 Nd2 at 1579 K.
1539	liq. + Co17Nd2 -> Co5Nd	liq.: Nd 0.27; Co17Nd2: Co 0.894737, Nd 0.105263; Co5Nd: Co 0.833333, Nd 0.166667	experimental	[1] Liu 2007 cites Okamoto 1993	Table 3, p. 5, row 6 report
1538	liq. + Co17Nd2 -> Co5Nd	liq.: Nd 0.2227; Co17Nd2: Co 0.894737, Nd 0.105263; Co5Nd: Co 0.833333, Nd 0.166667	model	[1] Liu 2007	Table 3, p. 5, row 5 report
1425	liq. + Co5Nd -> Co19Nd5	liq.: Nd 0.3352; Co5Nd: Co 0.833333, Nd 0.166667; Co19Nd5: Co 0.791667, Nd 0.208333	model	[1] Liu 2007	Table 3, p. 5, row 7 report
1425	liq. + Co5Nd -> Co19Nd5	liq.: Nd 0.35; Co5Nd: Co 0.833333, Nd 0.166667; Co19Nd5: Co 0.791667, Nd 0.208333	experimental	[1] Liu 2007 cites Okamoto 1993	Table 3, p. 5, row 8 report
1416	liq. + Co19Nd5 -> Co7Nd2	liq.: Nd 0.342; Co19Nd5: Co 0.791667, Nd 0.208333; Co7Nd2: Co 0.777778, Nd 0.222222	model	[1] Liu 2007	Table 3, p. 5, row 9 report
1416	liq. + Co19Nd5 -> Co7Nd2	liq.: Nd 0.36; Co19Nd5: Co 0.791667, Nd 0.208333; Co7Nd2: Co 0.777778, Nd 0.222222	experimental	[1] Liu 2007 cites Okamoto 1993	Table 3, p. 5, row 10 report
1373	liq. + Co7Nd2 -> Co3Nd	liq.: Nd 0.37; Co7Nd2: Co 0.777778, Nd 0.222222; Co3Nd: Co 0.75, Nd 0.25	experimental	[1] Liu 2007 cites Okamoto 1993	Table 3, p. 5, row 12 report
1373	liq. + Co7Nd2 -> Co3Nd	liq.: Nd 0.3721; Co7Nd2: Co 0.777778, Nd 0.222222; Co3Nd: Co 0.75, Nd 0.25	model	[1] Liu 2007	Table 3, p. 5, row 11 report
1323	liq. + Co3Nd -> Co2Nd	liq.: Nd 0.4; Co3Nd: Co 0.75, Nd 0.25; Co2Nd: Co 0.666667, Nd 0.333333	experimental	[1] Liu 2007 cites Okamoto 1993	Table 3, p. 5, row 14 report
1323	liq. + Co3Nd -> Co2Nd	liq.: Nd 0.4035; Co3Nd: Co 0.75, Nd 0.25; Co2Nd: Co 0.666667, Nd 0.333333	model	[1] Liu 2007	Table 3, p. 5, row 13 report
1128	liq. + bcc(Nd) -> dhcp(Nd)	liq.: Nd 0.93; bcc(Nd): Nd 1	model	[1] Liu 2007	Table 3, p. 5, row 29 report
1128	liq. + bcc(Nd) -> dhcp(Nd)	liq.: Nd 0.93; bcc(Nd): Nd 1	unspecified	[1] Liu 2007 cites Okamoto 1993	Table 3, p. 5, row 30 report
923	liq. + Co2Nd -> βCo3Nd2	liq.: Nd 0.575; Co2Nd: Co 0.666667, Nd 0.333333; βCo3Nd2: Co 0.6, Nd 0.4	experimental	[1] Liu 2007 cites Okamoto 1993	Table 3, p. 5, row 16 report
923	liq. + Co2Nd -> βCo3Nd2	liq.: Nd 0.5683; Co2Nd: Co 0.666667, Nd 0.333333; βCo3Nd2: Co 0.6, Nd 0.4	model	[1] Liu 2007	Table 3, p. 5, row 15 report
919	congruent melting: liq. -> CoNd3	liq.: Nd 0.75; CoNd3: Co 0.25, Nd 0.75	model	[1] Liu 2007	Table 3, p. 5, row 25 report
919	congruent melting: liq. -> CoNd3	liq.: Nd 0.75; CoNd3: Co 0.25, Nd 0.75	experimental	[1] Liu 2007 cites Okamoto 1993	Table 3, p. 5, row 26 report
898	eutectic: liq. -> CoNd3 + dhcp(Nd)	liq.: Nd 0.8; CoNd3: Co 0.25, Nd 0.75; dhcp(Nd): Nd 1	experimental	[1] Liu 2007 cites Okamoto 1993	Table 3, p. 5, row 28 report
898	eutectic: liq. -> CoNd3 + dhcp(Nd)	liq.: Nd 0.808; CoNd3: Co 0.25, Nd 0.75; dhcp(Nd): Nd 1	model	[1] Liu 2007	Table 3, p. 5, row 27 report
872	liq. + βCo3Nd2 -> Co3Nd4	liq.: Nd 0.61; βCo3Nd2: Co 0.6, Nd 0.4; Co3Nd4: Co 0.428571, Nd 0.571429	experimental	[1] Liu 2007 cites Okamoto 1993	Table 3, p. 5, row 20 report
872	liq. + βCo3Nd2 -> Co3Nd4	liq.: Nd 0.586; βCo3Nd2: Co 0.6, Nd 0.4; Co3Nd4: Co 0.428571, Nd 0.571429	model	[1] Liu 2007	Table 3, p. 5, row 19 report
869	liq. + CoNd3 -> Co2Nd5	liq.: Nd 0.6712; CoNd3: Co 0.25, Nd 0.75; Co2Nd5: Co 0.285714, Nd 0.714286	model	[1] Liu 2007	Table 3, p. 5, row 23 report
869	liq. + CoNd3 -> Co2Nd5	liq.: Nd 0.69; CoNd3: Co 0.25, Nd 0.75; Co2Nd5: Co 0.285714, Nd 0.714286	experimental	[1] Liu 2007 cites Okamoto 1993	Table 3, p. 5, row 24 report
856	polymorphic: βCo3Nd2 -> αCo3Nd2	βCo3Nd2: Co 0.6, Nd 0.4; αCo3Nd2: Co 0.6, Nd 0.4	model	[1] Liu 2007	Table 3, p. 5, row 17 report
856	polymorphic: βCo3Nd2 -> αCo3Nd2	βCo3Nd2: Co 0.6, Nd 0.4; αCo3Nd2: Co 0.6, Nd 0.4	experimental	[1] Liu 2007 cites Okamoto 1993	Table 3, p. 5, row 18 report
839	eutectic: liq. -> Co3Nd4 + Co2Nd5	liq.: Nd 0.64; Co3Nd4: Co 0.428571, Nd 0.571429; Co2Nd5: Co 0.285714, Nd 0.714286	model	[1] Liu 2007	Table 3, p. 5, row 21 report
839	eutectic: liq. -> Co3Nd4 + Co2Nd5	liq.: Nd 0.64; Co3Nd4: Co 0.428571, Nd 0.571429; Co2Nd5: Co 0.285714, Nd 0.714286	experimental	[1] Liu 2007 cites Okamoto 1993	Table 3, p. 5, row 22 report
695	fcc(Co) -> Co17Nd2 + hcp(Co)	fcc(Co): Nd 0; Co17Nd2: Co 0.894737, Nd 0.105263	experimental	[1] Liu 2007 cites Okamoto 1993	Table 3, p. 5, row 4 report
695	fcc(Co) -> Co17Nd2 + hcp(Co)	fcc(Co): Nd 0; Co17Nd2: Co 0.894737, Nd 0.105263	model	[1] Liu 2007	Table 3, p. 5, row 3 report

Other properties

Phase transition (7)

Phase transition, Co–Nd system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Phase transition	14 K	14	magnetic: CoNd3b alloy: Nd 0.75	experimental	[1] Liu 2007	Table 1, p. 3, row 14 report
Phase transition	105.3 K	105.3	magnetic: Co2Nd alloy: Nd 0.333333	experimental	[1] Liu 2007	Table 1, p. 3, row 13 report
Phase transition	392.6 K	392.6	magnetic: Co3Nd alloy: Nd 0.25	experimental	[1] Liu 2007	Table 1, p. 3, row 12 report
Phase transition	609 K	609	magnetic: Co7Nd2 alloy: Nd 0.222222	experimental	[1] Liu 2007	Table 1, p. 3, row 11 report
Phase transition	714 K	714	magnetic: Co19Nd5 alloy: Nd 0.208333	experimental	[1] Liu 2007	Table 1, p. 3, row 10 report
Phase transition	910 K	910	magnetic: Co5Nd alloy: Nd 0.166667	experimental	[1] Liu 2007	Table 1, p. 3, row 9 report
Phase transition	1157 K	1157	magnetic: Co17Nd2 alloy: Nd 0.105263	experimental	[1] Liu 2007	Table 1, p. 3, row 8 report

Sources

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

Xuebing Liu, Zhenmin Du, Cuiping Guo, Changrong Li, Thermodynamic assessment of the Co-Nd system, Journal of Alloys and Compounds 439, 97-102 (2007). doi:10.1016/j.jallcom.2006.08.081

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}
}