Be–Cu system

31 accepted literature values from 1 paper(s) (experimental 19, model 6, unspecified 6); 1 calculated phase diagram(s). 5 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 (6) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	19
model	6
unspecified	6

Accepted values by property group
Property group	Values
invariant reaction	25
crystal structure	6

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
BeCu-18Liu.tdb	Y. Liu, B. Sundman, Y. Du, J. Wang, S. Liu, W.P. Gong, C. Zhang, J. Mater. Sci., 53, 3756-66(2018). doi:10.1007/s10853-017-1777-z	`a0c9e1104448efbab98333c8459c71f46c0477ee9f7c10ea837823cb94afd488`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
BeCu-18Liu.tdb	1477.92	BCC_A2 (x(Cu) 0.15959) + LIQUID (x(Cu) 0.187) + C15_LAVES (x(Cu) 0.21634)
BeCu-18Liu.tdb	1477.92	B2_BCC (x(Cu) 0.15959) + LIQUID (x(Cu) 0.187) + C15_LAVES (x(Cu) 0.21634)
BeCu-18Liu.tdb	1395.47	HCP_A3 (x(Cu) 0.08532) + BCC_A2 (x(Cu) 0.12728) + C15_LAVES (x(Cu) 0.19776)
BeCu-18Liu.tdb	1395.47	HCP_A3 (x(Cu) 0.08532) + B2_BCC (x(Cu) 0.12728) + C15_LAVES (x(Cu) 0.19776)
BeCu-18Liu.tdb	1200.79	C15_LAVES (x(Cu) 0.36442) + B2_BCC (x(Cu) 0.51731) + LIQUID (x(Cu) 0.55717)
BeCu-18Liu.tdb	1200.79	C15_LAVES (x(Cu) 0.36442) + BCC_A2 (x(Cu) 0.51731) + LIQUID (x(Cu) 0.55717)
BeCu-18Liu.tdb	1132.1	B2_BCC (x(Cu) 0.72382) + LIQUID (x(Cu) 0.74568) + FCC_A1 (x(Cu) 0.85163)
BeCu-18Liu.tdb	1132.1	BCC_A2 (x(Cu) 0.72382) + LIQUID (x(Cu) 0.74568) + FCC_A1 (x(Cu) 0.85163)
BeCu-18Liu.tdb	894.15	B2_BCC (x(Cu) 0.54972) + BCC_A2 (x(Cu) 0.68916) + FCC_A1 (x(Cu) 0.88749)
BeCu-18Liu.tdb	894.15	B2_BCC#2 (x(Cu) 0.54972) + B2_BCC (x(Cu) 0.68916) + FCC_A1 (x(Cu) 0.88749)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Be–Cu system (25)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1512	congruent melting: Liquid ↔ δ		experimental	[1] Liu 2018 cites Losana 1942	Table 4, p. 9, row 22 report
1492	congruent melting: Liquid ↔ δ	Liquid: Be 0.78	experimental	[1] Liu 2018 cites Jonsson 1982	Table 4, p. 9, row 24 report
1488	congruent melting: Liquid ↔ δ		experimental	[1] Liu 2018 cites Borchers 1932	Table 4, p. 9, row 23 report
1474.6	Liquid ↔ δ + (βBe)	Liquid: Be 0.808; δ: Be 0.785; (βBe): Be 0.837	model	[1] Liu 2018	Table 4, p. 9, row 17 report
1472	Liquid ↔ δ + (βBe)	(βBe): Be 0.827	experimental	[1] Liu 2018 cites Jonsson 1982	Table 4, p. 9, row 16 report
1471.3	congruent melting: Liquid ↔ δ	Liquid: Be 0.765	model	[1] Liu 2018	Table 4, p. 9, row 25 report
1393	(βBe) ↔ δ + (αBe)	(βBe): Be 0.872; δ: Be 0.803; (αBe): Be 0.914	model	[1] Liu 2018	Table 4, p. 9, row 21 report
1390	(βBe) ↔ δ + (αBe)		experimental	[1] Liu 2018 cites Gelles 1963	Table 4, p. 9, row 19 report
1382	(βBe) ↔ δ + (αBe)	(αBe): Be 0.905	experimental	[1] Liu 2018 cites Jonsson 1982	Table 4, p. 9, row 20 report
1363	(βBe) ↔ δ + (αBe)		experimental	[1] Liu 2018 cites Jacobson 1966	Table 4, p. 9, row 18 report
1208.1	Liquid + δ ↔ γ	Liquid: Be 0.456; δ: Be 0.642; γ: Be 0.497	model	[1] Liu 2018	Table 4, p. 9, row 15 report
1206	Liquid + δ ↔ γ		experimental	[1] Liu 2018 cites Borchers 1932	Table 4, p. 9, row 14 report
1143	Liquid ↔ (Cu) + β	(Cu): Be 0.166	experimental	[1] Liu 2018 cites Abrikosov 1952	Table 4, p. 9, row 3 report
1139	Liquid ↔ (Cu) + β	(Cu): Be 0.137; β: Be 0.254	experimental	[1] Liu 2018 cites Iwase 1941	Table 4, p. 9, row 2 report
1138	Liquid ↔ (Cu) + β	(Cu): Be 0.169; β: Be 0.241	experimental	[1] Liu 2018 cites Borchers 1932	Table 4, p. 9, row 1 report
1132.1	Liquid ↔ (Cu) + β	Liquid: Be 0.254; (Cu): Be 0.148; β: Be 0.276	model	[1] Liu 2018	Table 4, p. 9, row 4 report
894.2	β ↔ (Cu) + γ	β: Be 0.311; (Cu): Be 0.113; γ: Be 0.45	model	[1] Liu 2018	Table 4, p. 9, row 13 report
881	β ↔ (Cu) + γ		experimental	[1] Liu 2018 cites Fillnow 1950	Table 4, p. 9, row 9 report
878	β ↔ (Cu) + γ		experimental	[1] Liu 2018 cites Morinaga 1965	Table 4, p. 9, row 11 report
874	β ↔ (Cu) + γ		experimental	[1] Liu 2018 cites Thomas 1944	Table 4, p. 9, row 8 report
863	β ↔ (Cu) + γ		experimental	[1] Liu 2018 cites Auvray 1974 doi	Table 4, p. 9, row 12 report
851	β ↔ (Cu) + γ	β: Be 0.31	experimental	[1] Liu 2018 cites Abrikosov 1952	Table 4, p. 9, row 10 report
851	β ↔ (Cu) + γ	β: Be 0.31; (Cu): Be 0.11; γ: Be 0.466	experimental	[1] Liu 2018 cites Borchers 1932	Table 4, p. 9, row 5 report
851	β ↔ (Cu) + γ	β: Be 0.31	experimental	[1] Liu 2018 cites Losana 1942	Table 4, p. 9, row 7 report
846	β ↔ (Cu) + γ	β: Be 0.318; (Cu): Be 0.097; γ: Be 0.476	experimental	[1] Liu 2018 cites Iwase 1941	Table 4, p. 9, row 6 report

Other properties

Crystal structure (6)

Crystal structure, Be–Cu system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Lattice a	2.81 Å		β	unspecified	[1] Liu 2018	Table 2, p. 3, row 2 report
Lattice a	2.286 Å	298.15	(αBe) alloy: Cu 0	unspecified	[1] Liu 2018	Table 2, p. 3, row 4 report
Lattice a	2.552 Å	298.15	(βBe) alloy: Cu 0	unspecified	[1] Liu 2018	Table 2, p. 3, row 6 report
Lattice a	2.702 Å	298.15	γ	unspecified	[1] Liu 2018	Table 2, p. 3, row 3 report
Lattice a	5.852 Å	298.15	δ	unspecified	[1] Liu 2018	Table 2, p. 3, row 5 report
Lattice c	3.585 Å	298.15	(αBe) alloy: Cu 0	unspecified	[1] Liu 2018	Table 2, p. 3, row 4 report

Sources

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

Yuling Liu, Bo Sundman, Yong Du, Jiong Wang, Shuhong Liu, Wei Ping Gong et al., A stepwise thermodynamic modeling of the phase diagram for the Cu–Be system, J Mater Sci 53, 3756-3766 (2018). doi:10.1007/s10853-017-1777-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}
}