Ba–Ge phases

13 phases (tier A 6, tier B 1, tier C 3, liquid 1, needs_review 2); 11 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 · Ba–Ge system page · Markdown · field reference

Phases of the Ba–Ge system (13)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
DIAMOND_A4 phase:ba-ge: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(Ge) 1–1	0	1
BA2GE_C37 phase:ba-ge:ba2ge-c37	Co2Si · C37 · oP12 · Pnma (62)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1271.02 K, x(Ge) 0.33333–0.33333	16	1
BA3GE4_ALPHA phase:ba-ge:ba3ge4-alpha		needs_review	stable in 1 of 1 calculated diagram(s): 300–613.06 K, x(Ge) 0.57143–0.57143	6	1
BA3GE4_BETA phase:ba-ge:ba3ge4-beta		needs_review	stable in 1 of 1 calculated diagram(s): 613.06–1202.1 K, x(Ge) 0.57143–0.57143	10	1
BA5GE3 phase:ba-ge:ba5ge3	Ba5Si3 · tP32 · P4/ncc (130)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–1193.52 K, x(Ge) 0.375–0.375	17	1
BA6GE25 phase:ba-ge:ba6ge25	K6Sn25 · cP124 · P4_132 (213)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–1086.7 K, x(Ge) 0.80645–0.80645	15	1
BA8GE43 phase:ba-ge:ba8ge43	Na4Si23 · cP54 · Pm-3n (223)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 1063.96–1085.68 K, x(Ge) 0.84314–0.84314	11	1
BAGE_B33 phase:ba-ge:bage-b33	CrB · B33 · oC8 · Cmcm (63)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1253.73 K, x(Ge) 0.5–0.5	16	1
BAGE2 phase:ba-ge:bage2	BaSi2 · oP24 · Pnma (62)	tier B: DFT-supported (unique MP + OQMD match)	stable in 1 of 1 calculated diagram(s): 300–1376.94 K, x(Ge) 0.66667–0.66667	20	1
BCC_A2 phase:ba-ge:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1004.11 K, x(Ge) 0–0	3	1
FCC_A1 phase:ba-ge:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	not stable in 1 calculated diagram(s)	0	1
HCP_A3 phase:ba-ge: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:ba-ge:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 933.52–2500 K, x(Ge) 0–1	22	1

DIAMOND_A4 (Ba–Ge)

Id: phase:ba-ge: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
Stoichiometry: Ge 1.0000
Stability: stable in 1 of 1 calculated diagram(s): 300–1211.4 K, x(Ge) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ba-ge:a4-diamond
tdb: tdb:BaGe-19Ben.tdb:DIAMOND_A4

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

BaGe-19Ben.tdb: DIAMOND_A4, type code %, sha256 118f846ad4780ff7…

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

Example references (1 of 1; assessments first):

doi:10.1007/s11669-019-00714-2 R. Benhafid, A. Belgacem Bouzida, Y. Djaballah, A. Candan, A. İyigör, G. Uğur, Thermodynamic Modeling of the Al-Ba and Ba-Ge Systems Supported by First-Principles Calculations, J. Phase Equilib. Diffus. 40, 195-205 (2019).
assessment that models this phase

BA2GE_C37 (Ba–Ge)

Id: phase:ba-ge:ba2ge-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-aaaaaupm and oqmd-1343651, space group 62
Stoichiometry: Ba 0.6667, Ge 0.3333
Stability: stable in 1 of 1 calculated diagram(s): 300–1271.02 K, x(Ge) 0.33333–0.33333
Literature: 16 values (16 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:ba-ge:ba2ge-c37
mp: mp:mp-aaaaaupm
oqmd: oqmd:oqmd-1343651
paper: paper:10.1007/s11669-019-00714-2:Ba2Ge
tdb: tdb:BaGe-19Ben.tdb:BA2GE_C37

TDB models of BA2GE_C37 (1): PHASE and CONSTITUENT statements as written

BaGe-19Ben.tdb: BA2GE_C37, type code %, sha256 118f846ad4780ff7…

51: PHASE BA2GE_C37 % 2 2 1 !
52: CONST BA2GE_C37 : BA : GE : !

Example references (3 of 3; assessments first):

doi:10.1007/s11669-019-00714-2 R. Benhafid, A. Belgacem Bouzida, Y. Djaballah, A. Candan, A. İyigör, G. Uğur, Thermodynamic Modeling of the Al-Ba and Ba-Ge Systems Supported by First-Principles Calculations, J. Phase Equilib. Diffus. 40, 195-205 (2019).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2007.08.005 M. Pani, A. Palenzona, The phase diagram of the Ba–Ge system, Journal of Alloys and Compounds 462, L9-L11 (2008).
cited as the source of values for this phase
doi:10.1515/znb-1973-3-427 K. Turban, Herbert Schäfer, Notizen: Darstellung und Kristallstruktur des Ba<sub>2</sub>Ge / Preparation and Crystal structure of Ba<sub>2</sub>Ge, Zeitschrift für Naturforschung B 28, 220-222 (1973).
cited as the source of values for this phase

BA3GE4_ALPHA (Ba–Ge)

Id: phase:ba-ge:ba3ge4-alpha; status needs_review
No structure assigned. Why: no_structure_token; polymorph_family:other phases of this system have the same composition
Candidate (dft_mp): Cmmm (65) — on-hull MP Ba3Ge4 at x(GE)=0.5714
Candidate (dft_oqmd): Cmmm (65) — on-hull OQMD Ba3 Ge4 at x(GE)=0.5714
Candidate (sgte_mmc2): Ba3Ge4 · oC56 · Cmmm (65) — Hallstedt 2025 mmc2 row for BA3GE4_ALPHA: Ba3Ge4-alpha
Candidate (tdb_comment): Ba3Ge4 · oC56 · Cmmm — BaGe-19Ben.tdb: 'Prototype Ba3Ge4 (oC56, Cmmm)'
Stoichiometry: Ba 0.4286, Ge 0.5714
Stability: stable in 1 of 1 calculated diagram(s): 300–613.06 K, x(Ge) 0.57143–0.57143
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ba-ge:ba3ge4-alpha
paper: paper:10.1007/s11669-019-00714-2:α-Ba3Ge4
tdb: tdb:BaGe-19Ben.tdb:BA3GE4_ALPHA

TDB models of BA3GE4_ALPHA (1): PHASE and CONSTITUENT statements as written

BaGe-19Ben.tdb: BA3GE4_ALPHA, type code %, sha256 118f846ad4780ff7…

66: PHASE BA3GE4_ALPHA % 2 3 4 !
67: CONST BA3GE4_ALPHA : BA : GE : !

Example references (3 of 3; assessments first):

doi:10.1007/s11669-019-00714-2 R. Benhafid, A. Belgacem Bouzida, Y. Djaballah, A. Candan, A. İyigör, G. Uğur, Thermodynamic Modeling of the Al-Ba and Ba-Ge Systems Supported by First-Principles Calculations, J. Phase Equilib. Diffus. 40, 195-205 (2019).
assessment that models this phase; reports values for this phase
doi:10.1002/(sici)1521-3773(19981217)37:23<3314::aid-anie3314>3.0.co;2-l Fabio Zürcher, Reinhard Nesper, Ba3Ge4: Polymerization of Zintl Anions in the Solid and Bond Stretching Isomerism, Angewandte Chemie International Edition 37, 3314-3318 (1998).
cited as the source of values for this phase
doi:10.1016/j.jallcom.2007.08.005 M. Pani, A. Palenzona, The phase diagram of the Ba–Ge system, Journal of Alloys and Compounds 462, L9-L11 (2008).
cited as the source of values for this phase

BA3GE4_BETA (Ba–Ge)

Id: phase:ba-ge:ba3ge4-beta; status needs_review
No structure assigned. Why: no_structure_token; polymorph_family:other phases of this system have the same composition
Candidate (dft_mp): Cmmm (65) — on-hull MP Ba3Ge4 at x(GE)=0.5714
Candidate (dft_oqmd): Cmmm (65) — on-hull OQMD Ba3 Ge4 at x(GE)=0.5714
Candidate (sgte_mmc2): Ba3Si4 · tP28 · P4_2/mnm (136) — Hallstedt 2025 mmc2 row for BA3GE4_BETA: Ba3Ge4-beta
Candidate (tdb_comment): Ba3Si4 · tP28 · P4_2/mnm — BaGe-19Ben.tdb: 'Prototype Ba3Si4 (tP28, P4_2/mnm)'
Stoichiometry: Ba 0.4286, Ge 0.5714
Stability: stable in 1 of 1 calculated diagram(s): 613.06–1202.1 K, x(Ge) 0.57143–0.57143
Literature: 10 values (10 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:ba-ge:ba3ge4-beta
paper: paper:10.1007/s11669-019-00714-2:Ba3Ge4, paper:10.1007/s11669-019-00714-2:β-Ba3Ge4, paper:10.1007/s11669-019-00714-2:βBa3Ge4
tdb: tdb:BaGe-19Ben.tdb:BA3GE4_BETA

TDB models of BA3GE4_BETA (1): PHASE and CONSTITUENT statements as written

BaGe-19Ben.tdb: BA3GE4_BETA, type code %, sha256 118f846ad4780ff7…

71: PHASE BA3GE4_BETA % 2 3 4 !
72: CONST BA3GE4_BETA : BA : GE : !

Example references (3 of 3; assessments first):

doi:10.1007/s11669-019-00714-2 R. Benhafid, A. Belgacem Bouzida, Y. Djaballah, A. Candan, A. İyigör, G. Uğur, Thermodynamic Modeling of the Al-Ba and Ba-Ge Systems Supported by First-Principles Calculations, J. Phase Equilib. Diffus. 40, 195-205 (2019).
assessment that models this phase; reports values for this phase
doi:10.1002/(sici)1521-3773(19981217)37:23<3314::aid-anie3314>3.0.co;2-l Fabio Zürcher, Reinhard Nesper, Ba3Ge4: Polymerization of Zintl Anions in the Solid and Bond Stretching Isomerism, Angewandte Chemie International Edition 37, 3314-3318 (1998).
cited as the source of values for this phase
doi:10.1016/j.jallcom.2007.08.005 M. Pani, A. Palenzona, The phase diagram of the Ba–Ge system, Journal of Alloys and Compounds 462, L9-L11 (2008).
cited as the source of values for this phase

BA5GE3 (Ba–Ge)

Id: phase:ba-ge:ba5ge3; status assigned
Structure: Ba5Si3 · tP32 · P4/ncc (130); type st:ba5si3-tp32; 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: Ba 0.6250, Ge 0.3750
Stability: stable in 1 of 1 calculated diagram(s): 300–1193.52 K, x(Ge) 0.375–0.375
Literature: 17 values (17 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ba-ge:ba5ge3
paper: paper:10.1007/s11669-019-00714-2:Ba5Ge3
tdb: tdb:BaGe-19Ben.tdb:BA5GE3

TDB models of BA5GE3 (1): PHASE and CONSTITUENT statements as written

BaGe-19Ben.tdb: BA5GE3, type code %, sha256 118f846ad4780ff7…

56: PHASE BA5GE3 % 2 5 3 !
57: CONST BA5GE3 : BA : GE : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-019-00714-2 R. Benhafid, A. Belgacem Bouzida, Y. Djaballah, A. Candan, A. İyigör, G. Uğur, Thermodynamic Modeling of the Al-Ba and Ba-Ge Systems Supported by First-Principles Calculations, J. Phase Equilib. Diffus. 40, 195-205 (2019).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2007.08.005 M. Pani, A. Palenzona, The phase diagram of the Ba–Ge system, Journal of Alloys and Compounds 462, L9-L11 (2008).
cited as the source of values for this phase

BA6GE25 (Ba–Ge)

Id: phase:ba-ge:ba6ge25; status assigned
Structure: K6Sn25 · cP124 · P4_132 (213); type st:k6sn25-cp124; 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: Ba 0.1935, Ge 0.8065
Stability: stable in 1 of 1 calculated diagram(s): 300–1086.7 K, x(Ge) 0.80645–0.80645
Literature: 15 values (15 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ba-ge:ba6ge25
paper: paper:10.1007/s11669-019-00714-2:Ba6Ge25
tdb: tdb:BaGe-19Ben.tdb:BA6GE25

TDB models of BA6GE25 (1): PHASE and CONSTITUENT statements as written

BaGe-19Ben.tdb: BA6GE25, type code %, sha256 118f846ad4780ff7…

81: PHASE BA6GE25 % 2 6 25 !
82: CONST BA6GE25 : BA : GE : !

Example references (5 of 5; assessments first):

doi:10.1007/s11669-019-00714-2 R. Benhafid, A. Belgacem Bouzida, Y. Djaballah, A. Candan, A. İyigör, G. Uğur, Thermodynamic Modeling of the Al-Ba and Ba-Ge Systems Supported by First-Principles Calculations, J. Phase Equilib. Diffus. 40, 195-205 (2019).
assessment that models this phase; reports values for this phase
doi:10.1515/ncrs-2000-0208 W. Carrillo-Cabrera, J. Curda, H. G. von Schnering, S. Paschen, Yu. Grin, Crystal structure of hexabarium pentacosagermanide, Ba6Ge25, Zeitschrift für Kristallographie - New Crystal Structures 215, 207-208 (2000).
cited as the source of values for this phase
doi:10.1006/jssc.2000.8632 Hiroshi Fukuoka, Kazuhito Iwai, Shoji Yamanaka, Hideki Abe, Kenji Yoza, Ludger Häming, Preparation and Structure of a New Germanium Clathrate, Ba24Ge100, Journal of Solid State Chemistry 151, 117-121 (2000).
cited as the source of values for this phase
doi:10.1016/j.jallcom.2007.08.005 M. Pani, A. Palenzona, The phase diagram of the Ba–Ge system, Journal of Alloys and Compounds 462, L9-L11 (2008).
cited as the source of values for this phase
doi:10.1016/j.jssc.2004.11.011 Wilder Carrillo-Cabrera, Horst Borrmann, Silke Paschen, Michael Baenitz, Frank Steglich, Yuri Grin, Ba6Ge25: low-temperature Ge–Ge bond breaking during temperature-induced structure transformation, Journal of Solid State Chemistry 178, 715-728 (2005).
cited as the source of values for this phase

BA8GE43 (Ba–Ge)

Id: phase:ba-ge:ba8ge43; status assigned
Structure: Na4Si23 · cP54 · Pm-3n (223); type st:na4si23-cp54; 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: Ba 0.1569, Ge 0.8431
Stability: stable in 1 of 1 calculated diagram(s): 1063.96–1085.68 K, x(Ge) 0.84314–0.84314
Literature: 11 values (10 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ba-ge:ba8ge43
paper: paper:10.1007/s11669-019-00714-2:Ba8Ge43
tdb: tdb:BaGe-19Ben.tdb:BA8GE43

TDB models of BA8GE43 (1): PHASE and CONSTITUENT statements as written

BaGe-19Ben.tdb: BA8GE43, type code %, sha256 118f846ad4780ff7…

86: PHASE BA8GE43 % 2 8 43 !
87: CONST BA8GE43 : BA : GE : !

Example references (4 of 4; assessments first):

doi:10.1007/s11669-019-00714-2 R. Benhafid, A. Belgacem Bouzida, Y. Djaballah, A. Candan, A. İyigör, G. Uğur, Thermodynamic Modeling of the Al-Ba and Ba-Ge Systems Supported by First-Principles Calculations, J. Phase Equilib. Diffus. 40, 195-205 (2019).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2007.08.005 M. Pani, A. Palenzona, The phase diagram of the Ba–Ge system, Journal of Alloys and Compounds 462, L9-L11 (2008).
cited as the source of values for this phase
doi:10.1016/j.jssc.2004.11.011 Wilder Carrillo-Cabrera, Horst Borrmann, Silke Paschen, Michael Baenitz, Frank Steglich, Yuri Grin, Ba6Ge25: low-temperature Ge–Ge bond breaking during temperature-induced structure transformation, Journal of Solid State Chemistry 178, 715-728 (2005).
cited as the source of values for this phase
doi:10.1515/ncrs-2000-0208 W. Carrillo-Cabrera, J. Curda, H. G. von Schnering, S. Paschen, Yu. Grin, Crystal structure of hexabarium pentacosagermanide, Ba6Ge25, Zeitschrift für Kristallographie - New Crystal Structures 215, 207-208 (2000).
cited as the source of values for this phase

BAGE_B33 (Ba–Ge)

Id: phase:ba-ge:bage-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-aaaaacoo and oqmd-646985, space group 63
Stoichiometry: Ba 0.5000, Ge 0.5000
Stability: stable in 1 of 1 calculated diagram(s): 300–1253.73 K, x(Ge) 0.5–0.5
Literature: 16 values (16 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:ba-ge:bage-b33
mp: mp:mp-aaaaacoo
oqmd: oqmd:oqmd-646985
paper: paper:10.1007/s11669-019-00714-2:BaGe
tdb: tdb:BaGe-19Ben.tdb:BAGE_B33

TDB models of BAGE_B33 (1): PHASE and CONSTITUENT statements as written

BaGe-19Ben.tdb: BAGE_B33, type code %, sha256 118f846ad4780ff7…

61: PHASE BAGE_B33 % 2 1 1 !
62: CONST BAGE_B33 : BA : GE : !

Example references (3 of 3; assessments first):

doi:10.1007/s11669-019-00714-2 R. Benhafid, A. Belgacem Bouzida, Y. Djaballah, A. Candan, A. İyigör, G. Uğur, Thermodynamic Modeling of the Al-Ba and Ba-Ge Systems Supported by First-Principles Calculations, J. Phase Equilib. Diffus. 40, 195-205 (2019).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2007.08.005 M. Pani, A. Palenzona, The phase diagram of the Ba–Ge system, Journal of Alloys and Compounds 462, L9-L11 (2008).
cited as the source of values for this phase
doi:10.1107/s0365110x67001793 W. Rieger, E. Parthé, Alkaline earth silicides, germanides and stannides with CrB structure type, Acta Cryst 22, 919-922 (1967).
cited as the source of values for this phase

BAGE2 (Ba–Ge)

Id: phase:ba-ge:bage2; status assigned
Structure: BaSi2 · oP24 · Pnma (62); type st:basi2-op24; tier B: DFT-supported (unique MP + OQMD match); confidence high
Stoichiometry: Ba 0.3333, Ge 0.6667
Stability: stable in 1 of 1 calculated diagram(s): 300–1376.94 K, x(Ge) 0.66667–0.66667
Literature: 20 values (20 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:ba-ge:bage2
mp: mp:mp-aaaaadeh
oqmd: oqmd:oqmd-20095
paper: paper:10.1007/s11669-019-00714-2:BaGe2
tdb: tdb:BaGe-19Ben.tdb:BAGE2

TDB models of BAGE2 (1): PHASE and CONSTITUENT statements as written

BaGe-19Ben.tdb: BAGE2, type code %, sha256 118f846ad4780ff7…

76: PHASE BAGE2 % 2 1 2 !
77: CONST BAGE2 : BA : GE : !

Example references (5 of 5; assessments first):

doi:10.1007/s11669-019-00714-2 R. Benhafid, A. Belgacem Bouzida, Y. Djaballah, A. Candan, A. İyigör, G. Uğur, Thermodynamic Modeling of the Al-Ba and Ba-Ge Systems Supported by First-Principles Calculations, J. Phase Equilib. Diffus. 40, 195-205 (2019).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2007.08.005 M. Pani, A. Palenzona, The phase diagram of the Ba–Ge system, Journal of Alloys and Compounds 462, L9-L11 (2008).
cited as the source of values for this phase
doi:10.1515/znb-1977-1128 Jürgen Evers, Gilbert Oehlinger, Armin Weiss, Notizen: Kristallstruktur von Bariumdigermanid bei hohen Drücken / Crystal Structure of Bariumdigermanide at High Pressures, Zeitschrift für Naturforschung B 32, 1352-1353 (1977).
cited as the source of values for this phase
doi:10.1016/j.jssc.2004.11.011 Wilder Carrillo-Cabrera, Horst Borrmann, Silke Paschen, Michael Baenitz, Frank Steglich, Yuri Grin, Ba6Ge25: low-temperature Ge–Ge bond breaking during temperature-induced structure transformation, Journal of Solid State Chemistry 178, 715-728 (2005).
cited as the source of values for this phase
doi:10.1515/ncrs-2000-0208 W. Carrillo-Cabrera, J. Curda, H. G. von Schnering, S. Paschen, Yu. Grin, Crystal structure of hexabarium pentacosagermanide, Ba6Ge25, Zeitschrift für Kristallographie - New Crystal Structures 215, 207-208 (2000).
cited as the source of values for this phase

BCC_A2 (Ba–Ge)

Id: phase:ba-ge: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): 300–1004.11 K, x(Ge) 0–0
Literature: 3 values (3 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ba-ge:bcc-a2
paper: paper:10.1007/s11669-019-00714-2:Ba
tdb: tdb:BaGe-19Ben.tdb:BCC_A2

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

BaGe-19Ben.tdb: BCC_A2, type code %B, sha256 118f846ad4780ff7…

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

Example references (2 of 2; assessments first):

doi:10.1007/s11669-019-00714-2 R. Benhafid, A. Belgacem Bouzida, Y. Djaballah, A. Candan, A. İyigör, G. Uğur, Thermodynamic Modeling of the Al-Ba and Ba-Ge Systems Supported by First-Principles Calculations, J. Phase Equilib. Diffus. 40, 195-205 (2019).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2007.08.005 M. Pani, A. Palenzona, The phase diagram of the Ba–Ge system, Journal of Alloys and Compounds 462, L9-L11 (2008).
cited as the source of values for this phase

FCC_A1 (Ba–Ge)

Id: phase:ba-ge:fcc-a1; status assigned
Structure: Cu · A1 · cF4 · Fm-3m (225); type st:a1-cu-cf4; 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:ba-ge:fcc-a1
tdb: tdb:BaGe-19Ben.tdb:FCC_A1

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

BaGe-19Ben.tdb: FCC_A1, type code %A, sha256 118f846ad4780ff7…

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

Example references (1 of 1; assessments first):

doi:10.1007/s11669-019-00714-2 R. Benhafid, A. Belgacem Bouzida, Y. Djaballah, A. Candan, A. İyigör, G. Uğur, Thermodynamic Modeling of the Al-Ba and Ba-Ge Systems Supported by First-Principles Calculations, J. Phase Equilib. Diffus. 40, 195-205 (2019).
assessment that models this phase

HCP_A3 (Ba–Ge)

Id: phase:ba-ge: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:ba-ge:hcp-a3
tdb: tdb:BaGe-19Ben.tdb:HCP_A3

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

BaGe-19Ben.tdb: HCP_A3, type code %A, sha256 118f846ad4780ff7…

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

Example references (1 of 1; assessments first):

doi:10.1007/s11669-019-00714-2 R. Benhafid, A. Belgacem Bouzida, Y. Djaballah, A. Candan, A. İyigör, G. Uğur, Thermodynamic Modeling of the Al-Ba and Ba-Ge Systems Supported by First-Principles Calculations, J. Phase Equilib. Diffus. 40, 195-205 (2019).
assessment that models this phase

LIQUID (Ba–Ge)

Id: phase:ba-ge:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 933.52–2500 K, x(Ge) 0–1
Literature: 22 values (22 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ba-ge:liquid
paper: paper:10.1007/s11669-019-00714-2:Liq
tdb: tdb:BaGe-19Ben.tdb:LIQUID

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

BaGe-19Ben.tdb: LIQUID, type code %, sha256 118f846ad4780ff7…

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

Example references (4 of 4; assessments first):

doi:10.1007/s11669-019-00714-2 R. Benhafid, A. Belgacem Bouzida, Y. Djaballah, A. Candan, A. İyigör, G. Uğur, Thermodynamic Modeling of the Al-Ba and Ba-Ge Systems Supported by First-Principles Calculations, J. Phase Equilib. Diffus. 40, 195-205 (2019).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2007.08.005 M. Pani, A. Palenzona, The phase diagram of the Ba–Ge system, Journal of Alloys and Compounds 462, L9-L11 (2008).
cited as the source of values for this phase
doi:10.1016/j.jssc.2004.11.011 Wilder Carrillo-Cabrera, Horst Borrmann, Silke Paschen, Michael Baenitz, Frank Steglich, Yuri Grin, Ba6Ge25: low-temperature Ge–Ge bond breaking during temperature-induced structure transformation, Journal of Solid State Chemistry 178, 715-728 (2005).
cited as the source of values for this phase
doi:10.1515/ncrs-2000-0208 W. Carrillo-Cabrera, J. Curda, H. G. von Schnering, S. Paschen, Yu. Grin, Crystal structure of hexabarium pentacosagermanide, Ba6Ge25, Zeitschrift für Kristallographie - New Crystal Structures 215, 207-208 (2000).
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}
}