Bi–Sr phases

10 phases (tier A 6, tier B 1, tier C 2, liquid 1); 9 stable in a calculated diagram. Structure types are assigned only when the stored evidence supports an assignment under the stated tier rules (tier A: standard phase name; tier B: unique Materials Project + OQMD on-hull match, DFT-supported; tier C: one structure stated by the assessment's crystallographic table, assessor-stated); other phases list candidates and are marked needs_review. Stability is from phase diagrams calculated with pycalphad from the SGTE binary collection (evidence class: model).

Data: interactive registry · full JSON · Bi–Sr system page · Markdown · field reference

Phases of the Bi–Sr system (10)
Phase	Structure	Basis	Stability (calculated)	TDB models
RHOMBOHEDRAL_A7 phase:bi-sr:a7-rhombohedral	alpha-As · A7 · hR2 · R-3m (166)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–546.24 K, x(Sr) 0–0	1
BCC_A2 phase:bi-sr:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 820–2500 K, x(Sr) 1–1	1
BI10SR11 phase:bi-sr:bi10sr11	Ge10Ho11 · tI84 · I4/mmm (139)	tier B: DFT-supported (unique MP + OQMD match)	stable in 1 of 1 calculated diagram(s): 300–882.96 K, x(Sr) 0.52381–0.52381	1
BI3SR_L12 phase:bi-sr:bi3sr-l12	AuCu3 · L1_2 · cP4 · Pm-3m (221)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–833.54 K, x(Sr) 0.25–0.25	1
BI3SR5_HT phase:bi-sr:bi3sr5	Sb3Yb5 · oP32 · Pnma (62)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 973.24–1217.55 K, x(Sr) 0.625–0.625	1
BI3SR5_D88 phase:bi-sr:bi3sr5-d88	Mn5Si3 · D8_8 · hP16 · P6_3/mcm (193)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–973.24 K, x(Sr) 0.625–0.625	1
BISR2 phase:bi-sr:bisr2	La2Sb · tI12 · I4/mmm (139)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–1128.62 K, x(Sr) 0.66667–0.66667	1
FCC_A1 phase:bi-sr:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–820 K, x(Sr) 1–1	1
HCP_A3 phase:bi-sr:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	not stable in 1 calculated diagram(s)	1
LIQUID phase:bi-sr:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 531.24–2500 K, x(Sr) 0–1	1

RHOMBOHEDRAL_A7 (Bi–Sr)

Id: phase:bi-sr:a7-rhombohedral; status assigned
Structure: alpha-As · A7 · hR2 · R-3m (166); type st:a7-alpha-as-hr2; tier A: standard phase name; confidence high
Stoichiometry: Bi 1.0000
Stability: stable in 1 of 1 calculated diagram(s): 300–546.24 K, x(Sr) 0–0
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:bi-sr:a7-rhombohedral
tdb: tdb:BiSr-14Wan.tdb:RHOMBOHEDRAL_A7

TDB models of RHOMBOHEDRAL_A7 (1): PHASE and CONSTITUENT statements as written

BiSr-14Wan.tdb: RHOMBOHEDRAL_A7, type code %, sha256 eae858ed7dbeda75…

41: PHASE RHOMBOHEDRAL_A7 % 1 1 !
42: CONST RHOMBOHEDRAL_A7 : BI : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2013.12.001 Yao Wang, Jinghua Xin, Chong Chen, Shuhong Liu, Biao Hu, Yong Du, Thermodynamic assessment of the Sr–In and Sr–Bi systems supported by first-principles calculations, Calphad 45, 49-54 (2014).
assessment that models this phase

BCC_A2 (Bi–Sr)

Id: phase:bi-sr:bcc-a2; status assigned
Structure: W · A2 · cI2 · Im-3m (229); type st:a2-w-ci2; tier A: standard phase name; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 820–2500 K, x(Sr) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:bi-sr:bcc-a2
tdb: tdb:BiSr-14Wan.tdb:BCC_A2

TDB models of BCC_A2 (1): PHASE and CONSTITUENT statements as written

BiSr-14Wan.tdb: BCC_A2, type code %B, sha256 eae858ed7dbeda75…

31: PHASE BCC_A2 %B 2 1 3 !
32: CONST BCC_A2 : BI SR% : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2013.12.001 Yao Wang, Jinghua Xin, Chong Chen, Shuhong Liu, Biao Hu, Yong Du, Thermodynamic assessment of the Sr–In and Sr–Bi systems supported by first-principles calculations, Calphad 45, 49-54 (2014).
assessment that models this phase

BI10SR11 (Bi–Sr)

Id: phase:bi-sr:bi10sr11; status assigned
Structure: Ge10Ho11 · tI84 · I4/mmm (139); type st:ge10ho11-ti84; tier B: DFT-supported (unique MP + OQMD match); confidence high
Stoichiometry: Bi 0.4762, Sr 0.5238
Stability: stable in 1 of 1 calculated diagram(s): 300–882.96 K, x(Sr) 0.52381–0.52381
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:bi-sr:bi10sr11
mp: mp:mp-aaaabsvp
oqmd: oqmd:oqmd-50743
tdb: tdb:BiSr-14Wan.tdb:BI10SR11

TDB models of BI10SR11 (1): PHASE and CONSTITUENT statements as written

BiSr-14Wan.tdb: BI10SR11, type code %, sha256 eae858ed7dbeda75…

51: PHASE BI10SR11 % 2 10 11 !
52: CONST BI10SR11 : BI : SR : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2013.12.001 Yao Wang, Jinghua Xin, Chong Chen, Shuhong Liu, Biao Hu, Yong Du, Thermodynamic assessment of the Sr–In and Sr–Bi systems supported by first-principles calculations, Calphad 45, 49-54 (2014).
assessment that models this phase

BI3SR_L12 (Bi–Sr)

Id: phase:bi-sr:bi3sr-l12; status assigned
Structure: AuCu3 · L1_2 · cP4 · Pm-3m (221); type st:l1-2-aucu3-cp4; tier A: standard phase name; confidence high
Stoichiometry: Bi 0.7500, Sr 0.2500
Stability: stable in 1 of 1 calculated diagram(s): 300–833.54 K, x(Sr) 0.25–0.25
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:bi-sr:bi3sr-l12
tdb: tdb:BiSr-14Wan.tdb:BI3SR_L12

TDB models of BI3SR_L12 (1): PHASE and CONSTITUENT statements as written

BiSr-14Wan.tdb: BI3SR_L12, type code %, sha256 eae858ed7dbeda75…

46: PHASE BI3SR_L12 % 2 3 1 !
47: CONST BI3SR_L12 : BI : SR : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2013.12.001 Yao Wang, Jinghua Xin, Chong Chen, Shuhong Liu, Biao Hu, Yong Du, Thermodynamic assessment of the Sr–In and Sr–Bi systems supported by first-principles calculations, Calphad 45, 49-54 (2014).
assessment that models this phase

BI3SR5_HT (Bi–Sr)

Id: phase:bi-sr:bi3sr5; status assigned
Structure: Sb3Yb5 · oP32 · Pnma (62); type st:sb3yb5-op32; tier C: assessor-stated (Hallstedt 2025 crystallographic table); confidence assessor-stated
Structure source: B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, supplementary crystallographic table (mmc2) doi:10.1016/j.calphad.2025.102833
Caveat: not certain from the name or DFT alone (no_structure_token, polymorph_family:other phases of this system have the same composition); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Bi 0.3750, Sr 0.6250
Stability: stable in 1 of 1 calculated diagram(s): 973.24–1217.55 K, x(Sr) 0.625–0.625
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:bi-sr:bi3sr5
tdb: tdb:BiSr-14Wan.tdb:BI3SR5_HT

TDB models of BI3SR5_HT (1): PHASE and CONSTITUENT statements as written

BiSr-14Wan.tdb: BI3SR5_HT, type code %, sha256 eae858ed7dbeda75…

61: PHASE BI3SR5_HT % 2 3 5 !
62: CONST BI3SR5_HT : BI : SR : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2013.12.001 Yao Wang, Jinghua Xin, Chong Chen, Shuhong Liu, Biao Hu, Yong Du, Thermodynamic assessment of the Sr–In and Sr–Bi systems supported by first-principles calculations, Calphad 45, 49-54 (2014).
assessment that models this phase

BI3SR5_D88 (Bi–Sr)

Id: phase:bi-sr:bi3sr5-d88; status assigned
Structure: Mn5Si3 · D8_8 · hP16 · P6_3/mcm (193); type st:d8-8-mn5si3-hp16; tier A: standard phase name; confidence high
Stoichiometry: Bi 0.3750, Sr 0.6250
Stability: stable in 1 of 1 calculated diagram(s): 300–973.24 K, x(Sr) 0.625–0.625
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:bi-sr:bi3sr5-d88
tdb: tdb:BiSr-14Wan.tdb:BI3SR5_D88

TDB models of BI3SR5_D88 (1): PHASE and CONSTITUENT statements as written

BiSr-14Wan.tdb: BI3SR5_D88, type code %, sha256 eae858ed7dbeda75…

56: PHASE BI3SR5_D88 % 2 3 5 !
57: CONST BI3SR5_D88 : BI : SR : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2013.12.001 Yao Wang, Jinghua Xin, Chong Chen, Shuhong Liu, Biao Hu, Yong Du, Thermodynamic assessment of the Sr–In and Sr–Bi systems supported by first-principles calculations, Calphad 45, 49-54 (2014).
assessment that models this phase

BISR2 (Bi–Sr)

Id: phase:bi-sr:bisr2; status assigned
Structure: La2Sb · tI12 · I4/mmm (139); type st:la2sb-ti12; tier C: assessor-stated (Hallstedt 2025 crystallographic table); confidence assessor-stated
Structure source: B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, supplementary crystallographic table (mmc2) doi:10.1016/j.calphad.2025.102833
Caveat: not certain from the name or DFT alone (no_on_hull_entry_in_both, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Bi 0.3333, Sr 0.6667
Stability: stable in 1 of 1 calculated diagram(s): 300–1128.62 K, x(Sr) 0.66667–0.66667
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:bi-sr:bisr2
tdb: tdb:BiSr-14Wan.tdb:BISR2

TDB models of BISR2 (1): PHASE and CONSTITUENT statements as written

BiSr-14Wan.tdb: BISR2, type code %, sha256 eae858ed7dbeda75…

66: PHASE BISR2 % 2 1 2 !
67: CONST BISR2 : BI : SR : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2013.12.001 Yao Wang, Jinghua Xin, Chong Chen, Shuhong Liu, Biao Hu, Yong Du, Thermodynamic assessment of the Sr–In and Sr–Bi systems supported by first-principles calculations, Calphad 45, 49-54 (2014).
assessment that models this phase

FCC_A1 (Bi–Sr)

Id: phase:bi-sr:fcc-a1; status assigned
Structure: Cu · A1 · cF4 · Fm-3m (225); type st:a1-cu-cf4; tier A: standard phase name; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 300–820 K, x(Sr) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:bi-sr:fcc-a1
tdb: tdb:BiSr-14Wan.tdb:FCC_A1

TDB models of FCC_A1 (1): PHASE and CONSTITUENT statements as written

BiSr-14Wan.tdb: FCC_A1, type code %A, sha256 eae858ed7dbeda75…

26: PHASE FCC_A1 %A 2 1 1 !
27: CONST FCC_A1 : BI SR% : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2013.12.001 Yao Wang, Jinghua Xin, Chong Chen, Shuhong Liu, Biao Hu, Yong Du, Thermodynamic assessment of the Sr–In and Sr–Bi systems supported by first-principles calculations, Calphad 45, 49-54 (2014).
assessment that models this phase

HCP_A3 (Bi–Sr)

Id: phase:bi-sr:hcp-a3; status assigned
Structure: Mg · A3 · hP2 · P6_3/mmc (194); type st:a3-mg-hp2; tier A: standard phase name; confidence high
Stability: not stable in 1 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:bi-sr:hcp-a3
tdb: tdb:BiSr-14Wan.tdb:HCP_A3

TDB models of HCP_A3 (1): PHASE and CONSTITUENT statements as written

BiSr-14Wan.tdb: HCP_A3, type code %A, sha256 eae858ed7dbeda75…

36: PHASE HCP_A3 %A 2 1 0.5 !
37: CONST HCP_A3 : BI SR : VA: !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2013.12.001 Yao Wang, Jinghua Xin, Chong Chen, Shuhong Liu, Biao Hu, Yong Du, Thermodynamic assessment of the Sr–In and Sr–Bi systems supported by first-principles calculations, Calphad 45, 49-54 (2014).
assessment that models this phase

LIQUID (Bi–Sr)

Id: phase:bi-sr:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 531.24–2500 K, x(Sr) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:bi-sr:liquid
tdb: tdb:BiSr-14Wan.tdb:LIQUID

TDB models of LIQUID (1): PHASE and CONSTITUENT statements as written

BiSr-14Wan.tdb: LIQUID, type code %, sha256 eae858ed7dbeda75…

21: PHASE LIQUID:L % 1 1 !
22: CONST LIQUID:L : BI SR : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2013.12.001 Yao Wang, Jinghua Xin, Chong Chen, Shuhong Liu, Biao Hu, Yong Du, Thermodynamic assessment of the Sr–In and Sr–Bi systems supported by first-principles calculations, Calphad 45, 49-54 (2014).
assessment that models this phase

Please cite

R. Arróyave, J. Saal, D. Shin, ORCHID-Registry: phase registry of binary systems (version 2026.10; Version 1, machine-extracted), Zenodo (2026). doi:10.5281/zenodo.23735970
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 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); the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work). 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_phase_registry_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Registry: phase registry of binary systems}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735970},
  url       = {https://doi.org/10.5281/zenodo.23735970},
  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}
}