Mg–Sr phases

8 phases (tier A 5, tier C 2, liquid 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 · Mg–Sr system page · Markdown · field reference

Phases of the Mg–Sr system (8)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:mg-sr:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 818.69–2500 K, x(Sr) 0.99709–1	0	2
FCC_A1 phase:mg-sr:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–820 K, x(Sr) 0.99732–1	3	2
HCP_A3 phase:mg-sr:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–928.63 K, x(Sr) 0–0.00097	5	2
LIQUID phase:mg-sr:liquid	liquid	liquid	stable in 2 of 2 calculated diagram(s): 699.95–2500 K, x(Sr) 0–1	24	2
MG17SR2 phase:mg-sr:mg17sr2	Ni17Th2 · hP38 · P6_3/mmc (194)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 2 of 2 calculated diagram(s): 300–878.99 K, x(Sr) 0.10526–0.10526	12	2
MG23SR6_D8A phase:mg-sr:mg23sr6-d8a	Mn23Th6 · D8_a · cF116 · Fm-3m (225)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–875.94 K, x(Sr) 0.2069–0.2069	4	2
MG2SR_C14 phase:mg-sr:mg2sr-c14	MgZn2 · C14 · hP12 · P6_3/mmc (194)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–960.66 K, x(Sr) 0.3285–0.33897	10	2
MG38SR9 phase:mg-sr:mg38sr9	Mg38Sr9 · hP94 · P6_3/mmc (194)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 2 of 2 calculated diagram(s): 300–871.93 K, x(Sr) 0.19149–0.19149	10	2

BCC_A2 (Mg–Sr)

Id: phase:mg-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 2 of 2 calculated diagram(s): 818.69–2500 K, x(Sr) 0.99709–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:mg-sr:bcc-a2
tdb: tdb:MgSr-06Zho.tdb:BCC_A2, tdb:MgSr-07Alj.tdb:BCC_A2

TDB models of BCC_A2 (2): PHASE and CONSTITUENT statements as written

MgSr-06Zho.tdb: BCC_A2, type code %B, sha256 80a83605604288d1…

30: PHASE BCC_A2 %B 2 1 3 !
31: CONST BCC_A2 : MG SR% : VA% : !

MgSr-07Alj.tdb: BCC_A2, type code %B, sha256 f812ec503d930523…

34: PHASE BCC_A2 %B 2 1 3 !
35: CONST BCC_A2 : MG SR% : VA% : !

Example references (2 of 2; assessments first):

doi:10.1016/j.intermet.2006.03.011 M. Aljarrah, U. Aghaulor, M. Medraj, Thermodynamic assessment of the Mg–Zn–Sr system, Intermetallics 15, 93-97 (2007).
assessment that models this phase
doi:10.1016/j.jallcom.2005.09.076 Yu Zhong, Jorge O. Sofo, Alan A. Luo, Zi-Kui Liu, Thermodynamics modeling of the Mg–Sr and Ca–Mg–Sr systems, Journal of Alloys and Compounds 421, 172-178 (2006).
assessment that models this phase

FCC_A1 (Mg–Sr)

Id: phase:mg-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 2 of 2 calculated diagram(s): 300–820 K, x(Sr) 0.99732–1
Literature: 3 values (3 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:mg-sr:fcc-a1
paper: paper:10.1016/j.jallcom.2005.09.076:fcc-Al
tdb: tdb:MgSr-06Zho.tdb:FCC_A1, tdb:MgSr-07Alj.tdb:FCC_A1

TDB models of FCC_A1 (2): PHASE and CONSTITUENT statements as written

MgSr-06Zho.tdb: FCC_A1, type code %A, sha256 80a83605604288d1…

25: PHASE FCC_A1 %A 2 1 1 !
26: CONST FCC_A1 : MG SR% : VA% : !

MgSr-07Alj.tdb: FCC_A1, type code %A, sha256 f812ec503d930523…

29: PHASE FCC_A1 %A 2 1 1 !
30: CONST FCC_A1 : MG SR% : VA% : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2005.09.076 Yu Zhong, Jorge O. Sofo, Alan A. Luo, Zi-Kui Liu, Thermodynamics modeling of the Mg–Sr and Ca–Mg–Sr systems, Journal of Alloys and Compounds 421, 172-178 (2006).
assessment that models this phase; reports values for this phase
doi:10.1016/j.intermet.2006.03.011 M. Aljarrah, U. Aghaulor, M. Medraj, Thermodynamic assessment of the Mg–Zn–Sr system, Intermetallics 15, 93-97 (2007).
assessment that models this phase
doi:10.1002/zaac.19472550102 Wilhelm Klemm, Fritz Dinkelacker, Über das Verhalten des Magnesiums zu Calcium, Strontium und Barium, Z. Anorg. Chem. 255, 2-12 (1947).
cited as the source of values for this phase

HCP_A3 (Mg–Sr)

Id: phase:mg-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: stable in 2 of 2 calculated diagram(s): 300–928.63 K, x(Sr) 0–0.00097
Literature: 5 values (5 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:mg-sr:hcp-a3
paper: paper:10.1016/j.jallcom.2005.09.076:hcp-Mg
tdb: tdb:MgSr-06Zho.tdb:HCP_A3, tdb:MgSr-07Alj.tdb:HCP_A3

TDB models of HCP_A3 (2): PHASE and CONSTITUENT statements as written

MgSr-06Zho.tdb: HCP_A3, type code %A, sha256 80a83605604288d1…

35: PHASE HCP_A3 %A 2 1 0.5 !
36: CONST HCP_A3 : MG% SR : VA% : !

MgSr-07Alj.tdb: HCP_A3, type code %A, sha256 f812ec503d930523…

39: PHASE HCP_A3 %A 2 1 0.5 !
40: CONST HCP_A3 : MG% SR : VA% : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2005.09.076 Yu Zhong, Jorge O. Sofo, Alan A. Luo, Zi-Kui Liu, Thermodynamics modeling of the Mg–Sr and Ca–Mg–Sr systems, Journal of Alloys and Compounds 421, 172-178 (2006).
assessment that models this phase; reports values for this phase
doi:10.1016/j.intermet.2006.03.011 M. Aljarrah, U. Aghaulor, M. Medraj, Thermodynamic assessment of the Mg–Zn–Sr system, Intermetallics 15, 93-97 (2007).
assessment that models this phase
doi:10.1002/zaac.19472550102 Wilhelm Klemm, Fritz Dinkelacker, Über das Verhalten des Magnesiums zu Calcium, Strontium und Barium, Z. Anorg. Chem. 255, 2-12 (1947).
cited as the source of values for this phase

LIQUID (Mg–Sr)

Id: phase:mg-sr:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 2 of 2 calculated diagram(s): 699.95–2500 K, x(Sr) 0–1
Literature: 24 values (24 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:mg-sr:liquid
paper: paper:10.1016/j.jallcom.2005.09.076:Liquid
tdb: tdb:MgSr-06Zho.tdb:LIQUID, tdb:MgSr-07Alj.tdb:LIQUID

TDB models of LIQUID (2): PHASE and CONSTITUENT statements as written

MgSr-06Zho.tdb: LIQUID, type code %, sha256 80a83605604288d1…

20: PHASE LIQUID:L % 1 1 !
21: CONST LIQUID:L : MG SR : !

MgSr-07Alj.tdb: LIQUID, type code %, sha256 f812ec503d930523…

24: PHASE LIQUID:L % 1 1 !
25: CONST LIQUID:L : MG SR : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2005.09.076 Yu Zhong, Jorge O. Sofo, Alan A. Luo, Zi-Kui Liu, Thermodynamics modeling of the Mg–Sr and Ca–Mg–Sr systems, Journal of Alloys and Compounds 421, 172-178 (2006).
assessment that models this phase; reports values for this phase
doi:10.1016/j.intermet.2006.03.011 M. Aljarrah, U. Aghaulor, M. Medraj, Thermodynamic assessment of the Mg–Zn–Sr system, Intermetallics 15, 93-97 (2007).
assessment that models this phase
doi:10.1002/zaac.19472550102 Wilhelm Klemm, Fritz Dinkelacker, Über das Verhalten des Magnesiums zu Calcium, Strontium und Barium, Z. Anorg. Chem. 255, 2-12 (1947).
cited as the source of values for this phase

MG17SR2 (Mg–Sr)

Id: phase:mg-sr:mg17sr2; status assigned
Structure: Ni17Th2 · hP38 · P6_3/mmc (194); type st:ni17th2-hp38; 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_mp, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Mg 0.8947, Sr 0.1053
Stability: stable in 2 of 2 calculated diagram(s): 300–878.99 K, x(Sr) 0.10526–0.10526
Literature: 12 values (12 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:mg-sr:mg17sr2
paper: paper:10.1016/j.jallcom.2005.09.076:Mg17Sr2
tdb: tdb:MgSr-06Zho.tdb:MG17SR2, tdb:MgSr-07Alj.tdb:MG17SR2

TDB models of MG17SR2 (2): PHASE and CONSTITUENT statements as written

MgSr-06Zho.tdb: MG17SR2, type code %, sha256 80a83605604288d1…

40: PHASE MG17SR2 % 2 17 2 !
41: CONST MG17SR2 : MG : SR : !

MgSr-07Alj.tdb: MG17SR2, type code %, sha256 f812ec503d930523…

44: PHASE MG17SR2 % 2 17 2 !
45: CONST MG17SR2 : MG : SR : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2005.09.076 Yu Zhong, Jorge O. Sofo, Alan A. Luo, Zi-Kui Liu, Thermodynamics modeling of the Mg–Sr and Ca–Mg–Sr systems, Journal of Alloys and Compounds 421, 172-178 (2006).
assessment that models this phase; reports values for this phase
doi:10.1016/j.intermet.2006.03.011 M. Aljarrah, U. Aghaulor, M. Medraj, Thermodynamic assessment of the Mg–Zn–Sr system, Intermetallics 15, 93-97 (2007).
assessment that models this phase
doi:10.1002/zaac.19472550102 Wilhelm Klemm, Fritz Dinkelacker, Über das Verhalten des Magnesiums zu Calcium, Strontium und Barium, Z. Anorg. Chem. 255, 2-12 (1947).
cited as the source of values for this phase

MG23SR6_D8A (Mg–Sr)

Id: phase:mg-sr:mg23sr6-d8a; status assigned
Structure: Mn23Th6 · D8_a · cF116 · Fm-3m (225); type st:d8-a-mn23th6-cf116; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaabtny and oqmd-17656, space group 225
Stoichiometry: Mg 0.7931, Sr 0.2069
Stability: stable in 2 of 2 calculated diagram(s): 300–875.94 K, x(Sr) 0.2069–0.2069
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:mg-sr:mg23sr6-d8a
mp: mp:mp-aaaabtny
oqmd: oqmd:oqmd-17656
paper: paper:10.1016/j.jallcom.2005.09.076:Mg23Sr6
tdb: tdb:MgSr-06Zho.tdb:MG23SR6_D8A, tdb:MgSr-07Alj.tdb:MG23SR6_D8A

TDB models of MG23SR6_D8A (2): PHASE and CONSTITUENT statements as written

MgSr-06Zho.tdb: MG23SR6_D8A, type code %, sha256 80a83605604288d1…

50: PHASE MG23SR6_D8A % 2 23 6 !
51: CONST MG23SR6_D8A : MG : SR : !

MgSr-07Alj.tdb: MG23SR6_D8A, type code %, sha256 f812ec503d930523…

54: PHASE MG23SR6_D8A % 2 23 6 !
55: CONST MG23SR6_D8A : MG : SR : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2005.09.076 Yu Zhong, Jorge O. Sofo, Alan A. Luo, Zi-Kui Liu, Thermodynamics modeling of the Mg–Sr and Ca–Mg–Sr systems, Journal of Alloys and Compounds 421, 172-178 (2006).
assessment that models this phase; reports values for this phase
doi:10.1016/j.intermet.2006.03.011 M. Aljarrah, U. Aghaulor, M. Medraj, Thermodynamic assessment of the Mg–Zn–Sr system, Intermetallics 15, 93-97 (2007).
assessment that models this phase

MG2SR_C14 (Mg–Sr)

Id: phase:mg-sr:mg2sr-c14; status assigned
Structure: MgZn2 · C14 · hP12 · P6_3/mmc (194); type st:c14-mgzn2-hp12; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in MgSr-06Zho.tdb also describes the disordered state
Stability: stable in 2 of 2 calculated diagram(s): 300–960.66 K, x(Sr) 0.3285–0.33897
Literature: 10 values (10 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:mg-sr:mg2sr-c14
paper: paper:10.1016/j.jallcom.2005.09.076:Mg2Sr
tdb: tdb:MgSr-06Zho.tdb:MG2SR_C14, tdb:MgSr-07Alj.tdb:MG2SR_C14

TDB models of MG2SR_C14 (2): PHASE and CONSTITUENT statements as written

MgSr-06Zho.tdb: MG2SR_C14, type code %, sha256 80a83605604288d1…

55: PHASE MG2SR_C14 % 2 2 1 !
56: CONST MG2SR_C14 : MG% SR : MG SR% : !

MgSr-07Alj.tdb: MG2SR_C14, type code %, sha256 f812ec503d930523…

59: PHASE MG2SR_C14 % 2 2 1 !
60: CONST MG2SR_C14 : MG : SR : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2005.09.076 Yu Zhong, Jorge O. Sofo, Alan A. Luo, Zi-Kui Liu, Thermodynamics modeling of the Mg–Sr and Ca–Mg–Sr systems, Journal of Alloys and Compounds 421, 172-178 (2006).
assessment that models this phase; reports values for this phase
doi:10.1016/j.intermet.2006.03.011 M. Aljarrah, U. Aghaulor, M. Medraj, Thermodynamic assessment of the Mg–Zn–Sr system, Intermetallics 15, 93-97 (2007).
assessment that models this phase
doi:10.1002/zaac.19472550102 Wilhelm Klemm, Fritz Dinkelacker, Über das Verhalten des Magnesiums zu Calcium, Strontium und Barium, Z. Anorg. Chem. 255, 2-12 (1947).
cited as the source of values for this phase

MG38SR9 (Mg–Sr)

Id: phase:mg-sr:mg38sr9; status assigned
Structure: Mg38Sr9 · hP94 · P6_3/mmc (194); type st:mg38sr9-hp94; 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: Mg 0.8085, Sr 0.1915
Stability: stable in 2 of 2 calculated diagram(s): 300–871.93 K, x(Sr) 0.19149–0.19149
Literature: 10 values (10 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:mg-sr:mg38sr9
paper: paper:10.1016/j.jallcom.2005.09.076:Mg38Sr9
tdb: tdb:MgSr-06Zho.tdb:MG38SR9, tdb:MgSr-07Alj.tdb:MG38SR9

TDB models of MG38SR9 (2): PHASE and CONSTITUENT statements as written

MgSr-06Zho.tdb: MG38SR9, type code %, sha256 80a83605604288d1…

45: PHASE MG38SR9 % 2 38 9 !
46: CONST MG38SR9 : MG : SR : !

MgSr-07Alj.tdb: MG38SR9, type code %, sha256 f812ec503d930523…

49: PHASE MG38SR9 % 2 38 9 !
50: CONST MG38SR9 : MG : SR : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2005.09.076 Yu Zhong, Jorge O. Sofo, Alan A. Luo, Zi-Kui Liu, Thermodynamics modeling of the Mg–Sr and Ca–Mg–Sr systems, Journal of Alloys and Compounds 421, 172-178 (2006).
assessment that models this phase; reports values for this phase
doi:10.1016/j.intermet.2006.03.011 M. Aljarrah, U. Aghaulor, M. Medraj, Thermodynamic assessment of the Mg–Zn–Sr system, Intermetallics 15, 93-97 (2007).
assessment that models this phase
doi:10.1002/zaac.19472550102 Wilhelm Klemm, Fritz Dinkelacker, Über das Verhalten des Magnesiums zu Calcium, Strontium und Barium, Z. Anorg. Chem. 255, 2-12 (1947).
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}
}