Ge–Sr phases

9 phases (tier A 7, liquid 1, needs_review 1); 8 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 · Ge–Sr system page · Markdown · field reference

Phases of the Ge–Sr system (9)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
DIAMOND_A4 phase:ge-sr:a4-diamond	C (diamond) · A4 · cF8 · Fd-3m (227)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1211.4 K, x(Sr) 0–0	2	1
BCC_A2 phase:ge-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	2	1
FCC_A1 phase:ge-sr:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1045 K, x(Sr) 1–1	0	1
GE2SR phase:ge-sr:ge2sr		needs_review	stable in 1 of 1 calculated diagram(s): 300–1283.66 K, x(Sr) 0.33333–0.33333	12	1
GE3SR5_D8L phase:ge-sr:ge3sr5-d8l	Cr5B3 · D8_l · tI32 · I4/mcm (140)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 1201.89–1431.43 K, x(Sr) 0.625–0.625	4	1
GESR_B33 phase:ge-sr:gesr-b33	CrB · B33 · oC8 · Cmcm (63)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1449.71 K, x(Sr) 0.5–0.5	6	1
GESR2_C37 phase:ge-sr:gesr2-c37	Co2Si · C37 · oP12 · Pnma (62)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1461.43 K, x(Sr) 0.66667–0.66667	6	1
HCP_A3 phase:ge-sr:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	not stable in 1 calculated diagram(s)	0	1
LIQUID phase:ge-sr:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 1015.2–2500 K, x(Sr) 0–1	16	1

DIAMOND_A4 (Ge–Sr)

Id: phase:ge-sr:a4-diamond; status assigned
Structure: C (diamond) · A4 · cF8 · Fd-3m (227); type st:a4-c-diamond-cf8; tier A: standard phase name; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 300–1211.4 K, x(Sr) 0–0
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ge-sr:a4-diamond, corpus:phase:ge-sr:diamond-a4
paper: paper:10.1016/j.calphad.2009.09.004:(Ge)
tdb: tdb:GeSr-09Du.tdb:DIAMOND_A4

TDB models of DIAMOND_A4 (1): PHASE and CONSTITUENT statements as written

GeSr-09Du.tdb: DIAMOND_A4, type code %, sha256 d90bda144b641912…

46: PHASE DIAMOND_A4 % 1 1 !
47: CONST DIAMOND_A4 : GE% SR : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2009.09.004 Yong Du, Lingling Li, Jiong Wang, Jianchuan Wang, Zhanpeng Jin, A thermodynamic description of the Ge–Sr system acquired via a hybrid approach of CALPHAD and first-principles calculations, Calphad 33, 719-722 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2005.04.189 A. Palenzona, M. Pani, The phase diagram of the Sr–Ge system, Journal of Alloys and Compounds 402, 136-140 (2005).
cited as the source of values for this phase

BCC_A2 (Ge–Sr)

Id: phase:ge-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: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ge-sr:bcc-a2
paper: paper:10.1016/j.calphad.2009.09.004:(βSr)
tdb: tdb:GeSr-09Du.tdb:BCC_A2

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

GeSr-09Du.tdb: BCC_A2, type code %, sha256 d90bda144b641912…

36: PHASE BCC_A2 % 2 1 3 !
37: CONST BCC_A2 : GE SR% : VA : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2009.09.004 Yong Du, Lingling Li, Jiong Wang, Jianchuan Wang, Zhanpeng Jin, A thermodynamic description of the Ge–Sr system acquired via a hybrid approach of CALPHAD and first-principles calculations, Calphad 33, 719-722 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2005.04.189 A. Palenzona, M. Pani, The phase diagram of the Sr–Ge system, Journal of Alloys and Compounds 402, 136-140 (2005).
cited as the source of values for this phase

FCC_A1 (Ge–Sr)

Id: phase:ge-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): 300–1045 K, x(Sr) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ge-sr:fcc-a1
tdb: tdb:GeSr-09Du.tdb:FCC_A1

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

GeSr-09Du.tdb: FCC_A1, type code %, sha256 d90bda144b641912…

31: PHASE FCC_A1 % 2 1 1 !
32: CONST FCC_A1 : GE SR% : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2009.09.004 Yong Du, Lingling Li, Jiong Wang, Jianchuan Wang, Zhanpeng Jin, A thermodynamic description of the Ge–Sr system acquired via a hybrid approach of CALPHAD and first-principles calculations, Calphad 33, 719-722 (2009).
assessment that models this phase

GE2SR (Ge–Sr)

Id: phase:ge-sr:ge2sr; status needs_review
No structure assigned. Why: assessment_declared_blocked_by:sgte_mmc2_row_disagrees_with_dft; dft_space_group_164_matches_2_structure_types; no_structure_token; sgte_mmc2_row_disagrees_with_dft
Candidate (dft_mp): P-3m1 (164) — on-hull MP SrGe2 at x(SR)=0.3333
Candidate (dft_oqmd): P-3m1 (164) — on-hull OQMD Ge2 Sr1 at x(SR)=0.3333
Candidate (dft_space_group_and_stoichiometry): CdI2 · C6 · hP3 · P-3m1 (164) — space group 164 and stoichiometry match
Candidate (dft_space_group_and_stoichiometry): Cd2Ce · hP3 · P-3m1 (164) — space group 164 and stoichiometry match
Candidate (literature_printed): BaSi2 · oP24 — printed with a label mapped to this phase
Candidate (sgte_mmc2): BaSi2 · oP24 · Pnma (62) — Hallstedt 2025 mmc2 row for GE2SR: Ge2Sr
Candidate (tdb_comment): BaSi2 · oP24 · Pnma — GeSr-09Du.tdb: 'Prototype BaSi2 (oP24, Pnma)'
Stoichiometry: Ge 0.6667, Sr 0.3333
Stability: stable in 1 of 1 calculated diagram(s): 300–1283.66 K, x(Sr) 0.33333–0.33333
Literature: 12 values (12 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ge-sr:ge2sr
paper: paper:10.1016/j.calphad.2009.09.004:Ge2Sr
tdb: tdb:GeSr-09Du.tdb:GE2SR

TDB models of GE2SR (1): PHASE and CONSTITUENT statements as written

GeSr-09Du.tdb: GE2SR, type code %, sha256 d90bda144b641912…

51: PHASE GE2SR % 2 2 1 !
52: CONST GE2SR : GE : SR : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2009.09.004 Yong Du, Lingling Li, Jiong Wang, Jianchuan Wang, Zhanpeng Jin, A thermodynamic description of the Ge–Sr system acquired via a hybrid approach of CALPHAD and first-principles calculations, Calphad 33, 719-722 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2005.04.189 A. Palenzona, M. Pani, The phase diagram of the Sr–Ge system, Journal of Alloys and Compounds 402, 136-140 (2005).
cited as the source of values for this phase

GE3SR5_D8L (Ge–Sr)

Id: phase:ge-sr:ge3sr5-d8l; status assigned
Structure: Cr5B3 · D8_l · tI32 · I4/mcm (140); type st:d8-l-cr5b3-ti32; tier A: standard phase name; confidence high
Stoichiometry: Ge 0.3750, Sr 0.6250
Stability: stable in 1 of 1 calculated diagram(s): 1201.89–1431.43 K, x(Sr) 0.625–0.625
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ge-sr:ge3sr5-d8l
paper: paper:10.1016/j.calphad.2009.09.004:Ge3Sr5
tdb: tdb:GeSr-09Du.tdb:GE3SR5_D8L

TDB models of GE3SR5_D8L (1): PHASE and CONSTITUENT statements as written

GeSr-09Du.tdb: GE3SR5_D8L, type code %, sha256 d90bda144b641912…

61: PHASE GE3SR5_D8L % 2 3 5 !
62: CONST GE3SR5_D8L : GE : SR : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2009.09.004 Yong Du, Lingling Li, Jiong Wang, Jianchuan Wang, Zhanpeng Jin, A thermodynamic description of the Ge–Sr system acquired via a hybrid approach of CALPHAD and first-principles calculations, Calphad 33, 719-722 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2005.04.189 A. Palenzona, M. Pani, The phase diagram of the Sr–Ge system, Journal of Alloys and Compounds 402, 136-140 (2005).
cited as the source of values for this phase

GESR_B33 (Ge–Sr)

Id: phase:ge-sr:gesr-b33; status assigned
Structure: CrB · B33 · oC8 · Cmcm (63); type st:b33-crb-oc8; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaaadep and oqmd-7990, space group 63
Stoichiometry: Ge 0.5000, Sr 0.5000
Stability: stable in 1 of 1 calculated diagram(s): 300–1449.71 K, x(Sr) 0.5–0.5
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:ge-sr:gesr-b33
mp: mp:mp-aaaaadep
oqmd: oqmd:oqmd-7990
paper: paper:10.1016/j.calphad.2009.09.004:GeSr
tdb: tdb:GeSr-09Du.tdb:GESR_B33

TDB models of GESR_B33 (1): PHASE and CONSTITUENT statements as written

GeSr-09Du.tdb: GESR_B33, type code %, sha256 d90bda144b641912…

56: PHASE GESR_B33 % 2 1 1 !
57: CONST GESR_B33 : GE : SR : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2009.09.004 Yong Du, Lingling Li, Jiong Wang, Jianchuan Wang, Zhanpeng Jin, A thermodynamic description of the Ge–Sr system acquired via a hybrid approach of CALPHAD and first-principles calculations, Calphad 33, 719-722 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2005.04.189 A. Palenzona, M. Pani, The phase diagram of the Sr–Ge system, Journal of Alloys and Compounds 402, 136-140 (2005).
cited as the source of values for this phase

GESR2_C37 (Ge–Sr)

Id: phase:ge-sr:gesr2-c37; status assigned
Structure: Co2Si · C37 · oP12 · Pnma (62); type st:c37-co2si-op12; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaaadvc and oqmd-647321, space group 62
Stoichiometry: Ge 0.3333, Sr 0.6667
Stability: stable in 1 of 1 calculated diagram(s): 300–1461.43 K, x(Sr) 0.66667–0.66667
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:ge-sr:gesr2-c37
mp: mp:mp-aaaaadvc
oqmd: oqmd:oqmd-647321
paper: paper:10.1016/j.calphad.2009.09.004:GeSr2
tdb: tdb:GeSr-09Du.tdb:GESR2_C37

TDB models of GESR2_C37 (1): PHASE and CONSTITUENT statements as written

GeSr-09Du.tdb: GESR2_C37, type code %, sha256 d90bda144b641912…

66: PHASE GESR2_C37 % 2 1 2 !
67: CONST GESR2_C37 : GE : SR : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2009.09.004 Yong Du, Lingling Li, Jiong Wang, Jianchuan Wang, Zhanpeng Jin, A thermodynamic description of the Ge–Sr system acquired via a hybrid approach of CALPHAD and first-principles calculations, Calphad 33, 719-722 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2005.04.189 A. Palenzona, M. Pani, The phase diagram of the Sr–Ge system, Journal of Alloys and Compounds 402, 136-140 (2005).
cited as the source of values for this phase

HCP_A3 (Ge–Sr)

Id: phase:ge-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:ge-sr:hcp-a3
tdb: tdb:GeSr-09Du.tdb:HCP_A3

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

GeSr-09Du.tdb: HCP_A3, type code %, sha256 d90bda144b641912…

41: PHASE HCP_A3 % 2 1 0.5 !
42: CONST HCP_A3 : GE SR : VA: !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2009.09.004 Yong Du, Lingling Li, Jiong Wang, Jianchuan Wang, Zhanpeng Jin, A thermodynamic description of the Ge–Sr system acquired via a hybrid approach of CALPHAD and first-principles calculations, Calphad 33, 719-722 (2009).
assessment that models this phase

LIQUID (Ge–Sr)

Id: phase:ge-sr:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 1015.2–2500 K, x(Sr) 0–1
Literature: 16 values (16 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ge-sr:liquid
paper: paper:10.1016/j.calphad.2009.09.004:L
tdb: tdb:GeSr-09Du.tdb:LIQUID

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

GeSr-09Du.tdb: LIQUID, type code %, sha256 d90bda144b641912…

26: PHASE LIQUID:L % 1 1 !
27: CONST LIQUID:L : GE SR : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2009.09.004 Yong Du, Lingling Li, Jiong Wang, Jianchuan Wang, Zhanpeng Jin, A thermodynamic description of the Ge–Sr system acquired via a hybrid approach of CALPHAD and first-principles calculations, Calphad 33, 719-722 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2005.04.189 A. Palenzona, M. Pani, The phase diagram of the Sr–Ge system, Journal of Alloys and Compounds 402, 136-140 (2005).
cited as the source of values for 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}
}