B system

38 accepted literature values from 8 paper(s) (experimental 16, model 12, unspecified 10); 0 calculated phase diagram(s).

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Accepted values by evidence class
Evidence class	Values
experimental	16
model	12
unspecified	10

Accepted values by property group
Property group	Values
invariant reaction	15
phase transition	1
crystal structure	22

Invariant reactions (literature)

Invariant reactions reported in the literature for the B system (15)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
2573.15	congruent melting: L -> β(B)	L: B 1; β(B): B 1	experimental	[1] Premović 2017 cites Stecher 1965	Table 2, p. 2, row 6 report
2563.15	congruent melting: L -> β(B)	L: B 1; β(B): B 1	experimental	[1] Premović 2017 cites Benesovsky 1967	Table 2, p. 2, row 5 report
2423	congruent melting: L <-> B	L: B 1; B: B 1	experimental	[2] Bittermann 1997 cites ref. 71Por	Table 1, p. 2, row 10 report
2373	congruent melting: L <-> B	L: B 1; B: B 1	experimental	[2] Bittermann 1997 cites ref. 65Rud1	Table 1, p. 2, row 9 report
2365.15	congruent melting: β -> L	β: B 1; L: B 1	experimental	[3] Campbell 1999 cites Schobel 1965	Table 4, p. 4, row 31 report
2365.15	congruent melting: β ↔ L	β: B 1; L: B 1	experimental	[3] Campbell 1999 cites Carlson 1990 doi	Table 3, p. 3, row 14 report
2365.15	congruent melting: L -> β(B)	L: B 1; β(B): B 1	unspecified	[1] Premović 2017 cites Holcombe 1973	Table 2, p. 2, row 4 report
2348.15	congruent melting: β -> L	β: B 1; L: B 1	model	[3] Campbell 1999 cites Dinsdale 1991 doi	Table 4, p. 4, row 32 report
2348.15	congruent melting: β ↔ L	β: B 1; L: B 1	model	[3] Campbell 1999 cites Dinsdale 1991 doi	Table 3, p. 3, row 15 report
2348.15	L -> β(B)	L: B 1; β(B): B 1	model	[1] Premović 2017	Table 7, p. 9, row 3 report
2348.15	L -> β(B)	L: B 1; β(B): B 1	experimental	[1] Premović 2017 cites Wang 2013 doi	Table 7, p. 9, row 4 report
2348.15	congruent melting: L -> β(B)	L: B 1; β(B): B 1	unspecified	[1] Premović 2017 cites Wang 2013 doi	Table 2, p. 2, row 3 report
2348	congruent melting: L <-> B	L: B 1; B: B 1	model	[2] Bittermann 1997	Table 1, p. 2, row 11 report
2347.15	congruent melting: L -> β(B)	L: B 0.996; β(B): B 0.996	experimental	[1] Premović 2017 cites Kimpel 1968 doi	Table 2, p. 2, row 2 report
2315.15	congruent melting: L -> β(B)	L: B 1; β(B): B 1	experimental	[1] Premović 2017 cites Mar 1972 doi	Table 2, p. 2, row 1 report

Other properties

Phase transition (1)

Phase transition, B system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase transition	2365.15 K	2365.15	B	experimental	[4] Campbell 2002 cites ref. 25	p. 5 report	The melting temperature of boron used by Dinsdale [lo] is 17 degrees lower than the melting temperature of 2092 "C [25] used in most evaluations.

Crystal structure (22)

Crystal structure, B system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Lattice a	10.9251 Å	298.15	(βB)(a) (βB)(a): B 1	unspecified	[5] Spear 1990	Table 3, p. 3, row 10 report
Lattice a	10.9253 Å	298.15	(βB)(a) (βB)(a): B 1	unspecified	[5] Spear 1990	Table 3, p. 3, row 11 report
Lattice a	10.9382 Å ± 5.000e-4	298.15	B	model	[6] Duschanek 1995 cites Crespo 1981	Table 2, p. 3, row 44 report
Lattice a	10.9276 Å ± 5.000e-4	298.15	B	model	[6] Duschanek 1995 cites Crespo 1981	Table 2, p. 3, row 43 report
Lattice a	10.9251 Å	298.15	B	experimental	[6] Duschanek 1995 cites Callmer 1977	Table 2, p. 3, row 42 report
Lattice a	1.017 not_printed	298.15	β(B)	experimental	[1] Premović 2017 cites Geist 1970	Table 1, p. 2, row 1 report
Lattice a	10.927 Å	298.15	βB	unspecified	[7] Duschanek 1995 cites ref. 85Vil	Table 3, p. 4, row 2 report
Lattice a	10.925 Å	298.15	βB	model	[8] Sun 2010 cites Liao 1986 doi	Table 1, p. 2, row 13 report
Lattice a	10.9251 Å	298.15	βB	unspecified	[7] Duschanek 1995	Table 3, p. 4, row 1 report
Lattice b	1.017 not_printed	298.15	β(B)	experimental	[1] Premović 2017 cites Geist 1970	Table 1, p. 2, row 1 report
Lattice b	23.81 Å	298.15	βB	model	[8] Sun 2010 cites Liao 1986 doi	Table 1, p. 2, row 13 report
Lattice c	23.8143 Å	298.15	(βB)(a) (βB)(a): B 1	unspecified	[5] Spear 1990	Table 3, p. 3, row 10 report
Lattice c	23.8103 Å	298.15	(βB)(a) (βB)(a): B 1	unspecified	[5] Spear 1990	Table 3, p. 3, row 11 report
Lattice c	23.8356 Å ± 0.0018	298.15	B	model	[6] Duschanek 1995 cites Crespo 1981	Table 2, p. 3, row 44 report
Lattice c	23.8141 Å ± 0.0015	298.15	B	model	[6] Duschanek 1995 cites Crespo 1981	Table 2, p. 3, row 43 report
Lattice c	23.8143 Å	298.15	B	experimental	[6] Duschanek 1995 cites Callmer 1977	Table 2, p. 3, row 42 report
Lattice c	23.8865 Å	298.15	βB	unspecified	[7] Duschanek 1995 cites ref. 85Vil	Table 3, p. 4, row 2 report
Lattice c	23.8143 Å	298.15	βB	unspecified	[7] Duschanek 1995	Table 3, p. 4, row 1 report
lattice alpha	65.12 not_printed	298.15	β(B)	experimental	[1] Premović 2017 cites Geist 1970	Table 1, p. 2, row 1 report
lattice v	2469.72 nm3 × 10^3	298.15	B	model	[6] Duschanek 1995 cites Crespo 1981	Table 2, p. 3, row 44 report
lattice v	2462.72 nm3 × 10^3	298.15	B	model	[6] Duschanek 1995 cites Crespo 1981	Table 2, p. 3, row 43 report
lattice v	2461.61 nm3 × 10^3	298.15	B	experimental	[6] Duschanek 1995 cites Callmer 1977	Table 2, p. 3, row 42 report

Sources

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

Milena Premović, Yong Du, Fan Zhang, Bo Sundman, Duško Minić, Biao Hu, Phase equilibria in the ternary B-Ce-Cu system with a thermodynamic reassessment of the binary B-Ce system, Thermochimica Acta 657, 185-196 (2017). doi:10.1016/j.tca.2017.10.006
H. Bittermann, P. Rogl, Critical assessment and thermodynamic calculation of the ternary system boron-hafnium-titanium (B-Hf-Ti), JPE 18, 24-47 (1997). doi:10.1007/bf02646757
C. E. Campbell, U. R. Kattner, A thermodynamic assessment of the Ni-Al-B system, JPE 20, 485-496 (1999). doi:10.1361/105497199770340743
C.E. Campbell, U.R. Kattner, Assessment of the Cr-B system and extrapolation to the Ni-Al-Cr-B quaternary system, Calphad 26, 477-490 (2002). doi:10.1016/s0364-5916(02)00058-5
K. E. Spear, P. K. Liao, The B-Sc (Boron-Scandium) system, Bulletin of Alloy Phase Diagrams 11, 321-324 (1990). doi:10.1007/bf02843307
H. Duschanek, P. Rogl, Critical assessment and thermodynamic calculation of the binary system boron-tungsten (B-W), JPE 16, 150-161 (1995). doi:10.1007/bf02664852
H. Duschanek, P. Rogl, H. L. Lukas, A critical assessment and thermodynamic calculation of the boron-carbon-titanium (B-C-Ti) ternary system, JPE 16, 46-60 (1995). doi:10.1007/bf02646248
Weihua Sun, Yong Du, Shuhong Liu, Baiyun Huang, Chao Jiang, Thermodynamic Assessment of the Mn-B System, J. Phase Equilib. Diffus. 31, 357-364 (2010). doi:10.1007/s11669-010-9740-6

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 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_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}
}