B–Si system

51 accepted literature values from 3 paper(s) (experimental 29, model 19, unspecified 3); 0 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 · phases (7) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	29
model	19
unspecified	3

Accepted values by property group
Property group	Values
invariant reaction	26
formation	11
activity / EMF / Gibbs energy	14

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull SiB-01Tok · CALPHAD hull SiB-03Tok · CALPHAD hull SiB-95Lim-LB

Invariant reactions (literature)

Invariant reactions reported in the literature for the B–Si system (26)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
2310	peritectic: Liquid + β-rhombo-B -> BnSi	L: Si 0.074; β-rhombo-B: Si 0.021; BnSi: Si 0.033	model	[1] (ed.) 1998	Table I, p. 144, row 4 report
2305.15	peritectic: L + (B) -> SiBn	L: B 0.914; (B): B 0.968; SiBn: B 0.959	model	[2] Tokunaga 2001	Table 2, p. 3, row 2 report
2293.15	peritectic: L + (B) -> SiBn	L: B 0.907; (B): B 0.97; SiBn: B 0.959	experimental	[2] Tokunaga 2001 cites Male 1981 doi	Table 2, p. 3, row 1 report
2293	peritectic: Liquid + (B) -> SiBn	L: B 0.907; SiBn: B 0.96, Si 0.04	experimental	[3] Chen 2009 cites Olesinski 1984 doi	Table 4, p. 4, row 11 report
2289.8	peritectic: Liquid + (B) -> SiBn	L: B 0.889; SiBn: B 0.96, Si 0.04	model	[3] Chen 2009	Table 4, p. 4, row 12 report
2127.15	peritectic: L + SiBn -> SiB6	L: B 0.639; SiBn: B 0.959; SiB6: B 0.857	model	[2] Tokunaga 2001	Table 2, p. 3, row 4 report
2123.15	peritectic: L + SiBn -> SiB6	L: B 0.653; SiBn: B 0.94; SiB6: B 0.857	experimental	[2] Tokunaga 2001 cites Male 1981 doi	Table 2, p. 3, row 3 report
2123	peritectic: Liquid + SiBn -> SiB6	L: B 0.653; SiBn: B 0.96, Si 0.04; SiB6: B 0.857143, Si 0.142857	experimental	[3] Chen 2009 cites Olesinski 1984 doi	Table 4, p. 4, row 9 report
2123	peritectic: Liquid + BnSi -> B6Si	L: Si 0.379; BnSi: Si 0.059; B6Si: Si 0.138	model	[1] (ed.) 1998	Table I, p. 144, row 3 report
2121	peritectic: Liquid + SiBn -> SiB6	L: B 0.649; SiBn: B 0.96, Si 0.04; SiB6: B 0.857143, Si 0.142857	model	[3] Chen 2009	Table 4, p. 4, row 10 report
1676	eutectic: Liquid -> (Si) + SiB6	L: B 0.08; SiB6: B 0.857143, Si 0.142857	experimental	[3] Chen 2009 cites Brosset 1960	Table 4, p. 4, row 1 report
1662.15	eutectic: L -> (Si) + SiB6	L: B 0.109; (Si): B 0.016; SiB6: B 0.857	model	[2] Tokunaga 2001	Table 2, p. 3, row 6 report
1661	eutectic: Liquid -> (Si) + SiB6	SiB6: B 0.857143, Si 0.142857	experimental	[3] Chen 2009 cites Tokunaga 2003 doi	Table 4, p. 4, row 6 report
1658.15	eutectic: L -> (Si) + SiB6	L: B 0.08; (Si): B 0.03; SiB6: B 0.857	experimental	[2] Tokunaga 2001 cites Olesinski 1984 doi	Table 2, p. 3, row 5 report
1658	eutectic: Liquid -> (Si) + SiB6	L: B 0.14; SiB6: B 0.857143, Si 0.142857	experimental	[3] Chen 2009 cites Armas 1981 doi	Table 4, p. 4, row 3 report
1658	eutectic: Liquid -> (Si) + SiB6	SiB6: B 0.857143, Si 0.142857	experimental	[3] Chen 2009 cites Arabey 1979	Table 4, p. 4, row 4 report
1657.6	eutectic: Liquid -> B6Si + diamond	L: Si 0.919; B6Si: Si 0.146; diamond: Si 0.989	model	[1] (ed.) 1998	Table I, p. 144, row 2 report
1648	eutectic: Liquid -> (Si) + SiB6	SiB6: B 0.857143, Si 0.142857	experimental	[3] Chen 2009 cites Samsonov 1962	Table 4, p. 4, row 2 report
1636	eutectic: Liquid -> (Si) + SiB6	SiB6: B 0.857143, Si 0.142857	experimental	[3] Chen 2009 cites Lungschneider 1979	Table 4, p. 4, row 5 report
1636	eutectic: Liquid -> (Si) + SiB6	SiB6: B 0.857143, Si 0.142857	experimental	[3] Chen 2009	Table 4, p. 4, row 7 report
1635.4	eutectic: Liquid -> (Si) + SiB6	L: B 0.127; SiB6: B 0.857143, Si 0.142857	model	[3] Chen 2009	Table 4, p. 4, row 8 report
1543.15	peritectoid: (Si) + SiB6 -> SiB3	(Si): B 0.011; SiB6: B 0.857; SiB3: B 0.75	model	[2] Tokunaga 2001	Table 2, p. 3, row 8 report
1543.15	peritectoid: (Si) + SiB6 -> SiB3	(Si): B 0.01; SiB6: B 0.857; SiB3: B 0.75	experimental	[2] Tokunaga 2001 cites Olesinski 1984 doi	Table 2, p. 3, row 7 report
1543	peritectoid: (Si) + SiB6 -> SiB3	SiB6: B 0.857143, Si 0.142857; SiB3: B 0.75, Si 0.25	experimental	[3] Chen 2009 cites Olesinski 1984 doi	Table 4, p. 4, row 13 report
1543	peritectoid: B6Si + diamond -> B3Si	B6Si: Si 0.145; diamond: Si 0.993; B3Si: Si 0.262	model	[1] (ed.) 1998	Table I, p. 144, row 1 report
1543	peritectoid: (Si) + SiB6 -> SiB3	SiB6: B 0.857143, Si 0.142857; SiB3: B 0.75, Si 0.25	model	[3] Chen 2009	Table 4, p. 4, row 14 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, B–Si system (7)
Phase	Value	T (K)	Class	Source	Location
SiB3	-90.8 kJ/mol (basis unstated)	298.15	unspecified	[3] Chen 2009 cites Gordienko 1995	Table 1, p. 2, row 1 report
SiB3	-26.99 kJ/mol (basis unstated)	298.15	unspecified	[3] Chen 2009 cites Chubinidze 1982	Table 1, p. 2, row 2 report
SiB6	-148 kJ/mol (basis unstated) ± 7.5	1757	experimental	[3] Chen 2009 cites Zaitsev 2002 doi	Table 1, p. 2, row 4 report
SiB6	-122.2 kJ/mol (basis unstated)	298.15	unspecified	[3] Chen 2009 cites Gordienko 1995	Table 1, p. 2, row 3 report
SiB6	-121 kJ/mol (basis unstated) ± 48	1800	experimental	[3] Chen 2009 cites Armas 1981 doi	Table 1, p. 2, row 5 report
SiBn	-217 kJ/mol (basis unstated) ± 92	1800	experimental	[3] Chen 2009 cites Armas 1981 doi	Table 1, p. 2, row 7 report
SiBn	-205 kJ/mol (basis unstated) ± 23	1769	experimental	[3] Chen 2009 cites Zaitsev 2002 doi	Table 1, p. 2, row 6 report

Other properties

Formation (4)

Formation, B–Si system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Gibbs energy of formation printed: -Δ_fG	-68.6 kJ/mol (basis unstated) ± 1.2	1757	SiB6 alloy: B 0.8571, Si 0.1429	experimental	[3] Chen 2009 cites Zaitsev 2002 doi	Table 1, p. 2, row 4 report
Gibbs energy of formation printed: −ΔfG	-105.5 kJ/mol (basis unstated) ± 3	1769	SiBn	experimental	[3] Chen 2009 cites Zaitsev 2002 doi	Table 1, p. 2, row 6 report
Gibbs energy of formation printed: −ΔfG	-54 kJ/mol (basis unstated) ± 15	1800	SiB6 alloy: B 0.8571, Si 0.1429	experimental	[3] Chen 2009 cites Armas 1981 doi	Table 1, p. 2, row 5 report
Gibbs energy of formation printed: −ΔfG	-108 kJ/mol (basis unstated) ± 35	1800	SiBn	experimental	[3] Chen 2009 cites Armas 1981 doi	Table 1, p. 2, row 7 report

Activity / EMF / Gibbs energy (14)

Activity / EMF / Gibbs energy, B–Si system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Activity B printed: a (B)	0.0147 1	1850	UNKNOWN alloy: B 0.015, Si 0.985	experimental	[3] Chen 2009 cites Zaitsev 2002 doi	Table 3, p. 3, row 1 report
Activity B printed: a (B)	0.06735 1	1850	UNKNOWN alloy: B 0.071, Si 0.929	model	[3] Chen 2009	Table 3, p. 3, row 6 report
Activity B printed: a (B)	0.03116 1	1850	UNKNOWN alloy: B 0.033, Si 0.967	model	[3] Chen 2009	Table 3, p. 3, row 4 report
Activity B printed: a (B)	0.224 1	1850	UNKNOWN alloy: B 0.232, Si 0.768	experimental	[3] Chen 2009 cites Zaitsev 2002 doi	Table 3, p. 3, row 11 report
Activity B printed: a (B)	0.121 1	1850	UNKNOWN alloy: B 0.124, Si 0.876	experimental	[3] Chen 2009 cites Zaitsev 2002 doi	Table 3, p. 3, row 7 report
Activity B printed: a (B)	0.1183 1	1850	UNKNOWN alloy: B 0.124, Si 0.876	model	[3] Chen 2009	Table 3, p. 3, row 8 report
Activity B printed: a (B)	0.0334 1	1850	UNKNOWN alloy: B 0.033, Si 0.967	experimental	[3] Chen 2009 cites Zaitsev 2002 doi	Table 3, p. 3, row 3 report
Activity B printed: a (B)	0.266 1	1850	UNKNOWN alloy: B 0.285, Si 0.715	experimental	[3] Chen 2009 cites Zaitsev 2002 doi	Table 3, p. 3, row 13 report
Activity B printed: a (B)	0.01413 1	1850	UNKNOWN alloy: B 0.015, Si 0.985	model	[3] Chen 2009	Table 3, p. 3, row 2 report
Activity B printed: a (B)	0.2762 1	1850	UNKNOWN alloy: B 0.285, Si 0.715	model	[3] Chen 2009	Table 3, p. 3, row 14 report
Activity B printed: a (B)	0.0692 1	1850	UNKNOWN alloy: B 0.071, Si 0.929	experimental	[3] Chen 2009 cites Zaitsev 2002 doi	Table 3, p. 3, row 5 report
Activity B printed: a (B)	0.1727 1	1850	UNKNOWN alloy: B 0.18, Si 0.82	model	[3] Chen 2009	Table 3, p. 3, row 10 report
Activity B printed: a (B)	0.176 1	1850	UNKNOWN alloy: B 0.18, Si 0.82	experimental	[3] Chen 2009 cites Zaitsev 2002 doi	Table 3, p. 3, row 9 report
Activity B printed: a (B)	0.2238 1	1850	UNKNOWN alloy: B 0.232, Si 0.768	model	[3] Chen 2009	Table 3, p. 3, row 12 report

Sources

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

I. Ansara, A. T. Dinsdale, M. H. Rand (eds.), COST 507: Thermochemical database for light metal alloys, Volume 2, EUR 18499 EN, Office for Official Publications of the European Communities, Luxembourg (1998), ISBN 92-828-3902-8.
T. Tokunaga, K. Nishio, M. Hasebe, Thermodynamic study of phase equilibria in the Ni-Si-B system, JPE 22, 291-299 (2001). doi:10.1361/105497101770338798
H.M. Chen, H.Y. Qi, F. Zheng, L.B. Liu, Z.P. Jin, Thermodynamic assessment of the B–C–Si system, Journal of Alloys and Compounds 481, 182-189 (2009). doi:10.1016/j.jallcom.2009.03.044

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-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); 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); 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. 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_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}
}