Gd–Ge phases

14 phases (tier A 6, tier C 1, liquid 1, needs_review 6); 13 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 · Gd–Ge system page · Markdown · field reference

Phases of the Gd–Ge system (14)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
DIAMOND_A4 phase:gd-ge:a4-diamond	C (diamond) · A4 · cF8 · Fd-3m (227)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1210.81 K, x(Ge) 1–1	6	1
BCC_A2 phase:gd-ge:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 1508.16–1583.16 K, x(Ge) 0–0	0	1
FCC_A1 phase:gd-ge:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	not stable in 1 calculated diagram(s)	0	1
GD2GE3_BETA phase:gd-ge:gd2ge3-beta		needs_review	stable in 1 of 1 calculated diagram(s): 1106.03–1483.24 K, x(Ge) 0.59–0.59	10	1
GD2GE3_C32 phase:gd-ge:gd2ge3-c32		needs_review	stable in 1 of 1 calculated diagram(s): 300–1106.03 K, x(Ge) 0.59–0.59	4	1
GD2GE3_GAMMA phase:gd-ge:gd2ge3-gamma		needs_review	stable in 1 of 1 calculated diagram(s): 1342.95–1687.12 K, x(Ge) 0.6–0.6	6	1
GD2GE5 phase:gd-ge:gd2ge5		needs_review	stable in 1 of 1 calculated diagram(s): 1122.89–1163.07 K, x(Ge) 0.71989–0.71989	6	1
GD3GE5_BETA phase:gd-ge:gd3ge5-beta		needs_review	stable in 1 of 1 calculated diagram(s): 872–1080.44 K, x(Ge) 0.625–0.625	0	1
GD3GE5_CC phase:gd-ge:gd3ge5-cc		needs_review	stable in 1 of 1 calculated diagram(s): 300–872 K, x(Ge) 0.625–0.625	0	1
GD5GE3_D88 phase:gd-ge:gd5ge3-d88	Mn5Si3 · D8_8 · hP16 · P6_3/mcm (193)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–2063.04 K, x(Ge) 0.375–0.375	10	1
GD5GE4 phase:gd-ge:gd5ge4	Ge4Sm5 · oP36 · Pnma (62)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–1962.66 K, x(Ge) 0.44444–0.44444	4	1
GDGE_B33 phase:gd-ge:gdge-b33	CrB · B33 · oC8 · Cmcm (63)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1843.96 K, x(Ge) 0.5–0.5	6	1
HCP_A3 phase:gd-ge:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1533.16 K, x(Ge) 0–0	2	1
LIQUID phase:gd-ge:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 1132.59–2500 K, x(Ge) 0–1	16	1

DIAMOND_A4 (Gd–Ge)

Id: phase:gd-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): 300–1210.81 K, x(Ge) 1–1
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:gd-ge:a4-diamond, corpus:phase:gd-ge:diamond-a4
paper: paper:10.1016/j.jallcom.2007.07.105:Ge
tdb: tdb:GdGe-08Che.tdb:DIAMOND_A4

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

GdGe-08Che.tdb: DIAMOND_A4, type code %, sha256 fc48e8e82696745e…

43: PHASE DIAMOND_A4 % 1 1 !
44: CONST DIAMOND_A4 : GE : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2007.07.105 Hai-Lin Chen, Yong Du, Cui-Yun He, Thermodynamic modeling of the gadolinium–germanium system, Journal of Alloys and Compounds 462, 181-186 (2008).
assessment that models this phase; reports values for this phase
doi:10.1007/bf00792035 V. N. Eremenko, V. G. Batalin, Yu. I. Buyanov, I. M. Obushenko, Constitution diagram of the gadolinium-germanium system, Powder Metall Met Ceram 19, 104-108 (1980).
cited as the source of values for this phase

BCC_A2 (Gd–Ge)

Id: phase:gd-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): 1508.16–1583.16 K, x(Ge) 0–0
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:gd-ge:bcc-a2
tdb: tdb:GdGe-08Che.tdb:BCC_A2

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

GdGe-08Che.tdb: BCC_A2, type code %B, sha256 fc48e8e82696745e…

33: PHASE BCC_A2 %B 2 1 3 !
34: CONST BCC_A2 : GD% GE : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2007.07.105 Hai-Lin Chen, Yong Du, Cui-Yun He, Thermodynamic modeling of the gadolinium–germanium system, Journal of Alloys and Compounds 462, 181-186 (2008).
assessment that models this phase

FCC_A1 (Gd–Ge)

Id: phase:gd-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:gd-ge:fcc-a1
tdb: tdb:GdGe-08Che.tdb:FCC_A1

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

GdGe-08Che.tdb: FCC_A1, type code %A, sha256 fc48e8e82696745e…

28: PHASE FCC_A1 %A 2 1 1 !
29: CONST FCC_A1 : GD GE : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2007.07.105 Hai-Lin Chen, Yong Du, Cui-Yun He, Thermodynamic modeling of the gadolinium–germanium system, Journal of Alloys and Compounds 462, 181-186 (2008).
assessment that models this phase

GD2GE3_BETA (Gd–Ge)

Id: phase:gd-ge:gd2ge3-beta; status needs_review
No structure assigned. Why: no_structure_token; polymorph_family:other phases of this system have the same composition; sgte_mmc2_row_incomplete
Candidate (literature_printed): (beta-Gd2Ge3) · ? — printed with a label mapped to this phase
Candidate (sgte_mmc2): (beta-Gd2Ge3) — Hallstedt 2025 mmc2 row for GD2GE3_BETA: Gd2Ge3 (beta)
Stoichiometry: Gd 0.4100, Ge 0.5900
Stability: stable in 1 of 1 calculated diagram(s): 1106.03–1483.24 K, x(Ge) 0.59–0.59
Literature: 10 values (10 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:gd-ge:gd2ge3-beta
paper: paper:10.1016/j.jallcom.2007.07.105:β-Gd2Ge3
tdb: tdb:GdGe-08Che.tdb:GD2GE3_BETA

TDB models of GD2GE3_BETA (1): PHASE and CONSTITUENT statements as written

GdGe-08Che.tdb: GD2GE3_BETA, type code %, sha256 fc48e8e82696745e…

68: PHASE GD2GE3_BETA % 2 0.41 0.59 !
69: CONST GD2GE3_BETA : GD : GE : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2007.07.105 Hai-Lin Chen, Yong Du, Cui-Yun He, Thermodynamic modeling of the gadolinium–germanium system, Journal of Alloys and Compounds 462, 181-186 (2008).
assessment that models this phase; reports values for this phase
doi:10.1007/bf00792035 V. N. Eremenko, V. G. Batalin, Yu. I. Buyanov, I. M. Obushenko, Constitution diagram of the gadolinium-germanium system, Powder Metall Met Ceram 19, 104-108 (1980).
cited as the source of values for this phase

GD2GE3_C32 (Gd–Ge)

Id: phase:gd-ge:gd2ge3-c32; status needs_review
No structure assigned. Why: assessment_declared_blocked_by:stoichiometry_contradicts_C32; stoichiometry_contradicts_C32:GdGe-08Che.tdb
Candidate (literature_printed): AlB2 · hP3 — printed with a label mapped to this phase
Candidate (name_token): AlB2 · C32 · hP3 · P6/mmm (191) — Strukturbericht/word 'C32' in the TDB name
Candidate (sgte_mmc2): AlB2 · C32 · hP3 · P6/mmm (191) — Hallstedt 2025 mmc2 row for GD2GE3_C32: Gd2Ge3 (alpha)
Candidate (tdb_comment): AlB2 · hP3 · P6/mmm — GdGe-08Che.tdb: 'Prototype AlB2 (hP3, P6/mmm)'
Stoichiometry: Gd 0.4100, Ge 0.5900
Stability: stable in 1 of 1 calculated diagram(s): 300–1106.03 K, x(Ge) 0.59–0.59
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:gd-ge:gd2ge3-c32
paper: paper:10.1016/j.jallcom.2007.07.105:α-Gd2Ge3
tdb: tdb:GdGe-08Che.tdb:GD2GE3_C32

TDB models of GD2GE3_C32 (1): PHASE and CONSTITUENT statements as written

GdGe-08Che.tdb: GD2GE3_C32, type code %, sha256 fc48e8e82696745e…

63: PHASE GD2GE3_C32 % 2 0.41 0.59 !
64: CONST GD2GE3_C32 : GD : GE : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2007.07.105 Hai-Lin Chen, Yong Du, Cui-Yun He, Thermodynamic modeling of the gadolinium–germanium system, Journal of Alloys and Compounds 462, 181-186 (2008).
assessment that models this phase; reports values for this phase
doi:10.1007/bf00792035 V. N. Eremenko, V. G. Batalin, Yu. I. Buyanov, I. M. Obushenko, Constitution diagram of the gadolinium-germanium system, Powder Metall Met Ceram 19, 104-108 (1980).
cited as the source of values for this phase

GD2GE3_GAMMA (Gd–Ge)

Id: phase:gd-ge:gd2ge3-gamma; status needs_review
No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_row_incomplete
Candidate (literature_printed): (gamma-Gd2Ge3) · ? — printed with a label mapped to this phase
Candidate (sgte_mmc2): (gamma-Gd2Ge3) — Hallstedt 2025 mmc2 row for GD2GE3_GAMMA: Gd2Ge3 (gamma)
Stoichiometry: Gd 0.4000, Ge 0.6000
Stability: stable in 1 of 1 calculated diagram(s): 1342.95–1687.12 K, x(Ge) 0.6–0.6
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:gd-ge:gd2ge3-gamma
paper: paper:10.1016/j.jallcom.2007.07.105:γ-Gd2Ge3
tdb: tdb:GdGe-08Che.tdb:GD2GE3_GAMMA

TDB models of GD2GE3_GAMMA (1): PHASE and CONSTITUENT statements as written

GdGe-08Che.tdb: GD2GE3_GAMMA, type code %, sha256 fc48e8e82696745e…

73: PHASE GD2GE3_GAMMA % 2 2 3 !
74: CONST GD2GE3_GAMMA : GD : GE : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2007.07.105 Hai-Lin Chen, Yong Du, Cui-Yun He, Thermodynamic modeling of the gadolinium–germanium system, Journal of Alloys and Compounds 462, 181-186 (2008).
assessment that models this phase; reports values for this phase
doi:10.1007/bf00792035 V. N. Eremenko, V. G. Batalin, Yu. I. Buyanov, I. M. Obushenko, Constitution diagram of the gadolinium-germanium system, Powder Metall Met Ceram 19, 104-108 (1980).
cited as the source of values for this phase

GD2GE5 (Gd–Ge)

Id: phase:gd-ge:gd2ge5; status needs_review
No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_row_incomplete
Candidate (literature_printed): (GdGe2.57) · oC* — printed with a label mapped to this phase
Candidate (sgte_mmc2): (GdGe2.57) · C222_1 (20) — Hallstedt 2025 mmc2 row for GD2GE5: GdGe2.57
Stoichiometry: Gd 0.2801, Ge 0.7199
Stability: stable in 1 of 1 calculated diagram(s): 1122.89–1163.07 K, x(Ge) 0.71989–0.71989
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:gd-ge:gd2ge5
paper: paper:10.1016/j.jallcom.2007.07.105:GdGe2.57
tdb: tdb:GdGe-08Che.tdb:GD2GE5

TDB models of GD2GE5 (1): PHASE and CONSTITUENT statements as written

GdGe-08Che.tdb: GD2GE5, type code %, sha256 fc48e8e82696745e…

88: PHASE GD2GE5 % 2 1 2.57 !
89: CONST GD2GE5 : GD : GE : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2007.07.105 Hai-Lin Chen, Yong Du, Cui-Yun He, Thermodynamic modeling of the gadolinium–germanium system, Journal of Alloys and Compounds 462, 181-186 (2008).
assessment that models this phase; reports values for this phase
doi:10.1007/bf00792035 V. N. Eremenko, V. G. Batalin, Yu. I. Buyanov, I. M. Obushenko, Constitution diagram of the gadolinium-germanium system, Powder Metall Met Ceram 19, 104-108 (1980).
cited as the source of values for this phase

GD3GE5_BETA (Gd–Ge)

Id: phase:gd-ge:gd3ge5-beta; status needs_review
No structure assigned. Why: no_structure_token; polymorph_family:other phases of this system have the same composition
Candidate (dft_oqmd): P-62c (190) — on-hull OQMD Gd3 Ge5 at x(GE)=0.6250
Candidate (sgte_mmc2): Ge5Y3 · oF64 · Fdd2 (43) — Hallstedt 2025 mmc2 row for GD3GE5_BETA: Gd3Ge5-beta
Candidate (tdb_comment): Ge5Y3 · oF64 · Fdd2 — GdGe-08Che.tdb: 'Prototype Ge5Y3 (oF64, Fdd2)'
Stoichiometry: Gd 0.3750, Ge 0.6250
Stability: stable in 1 of 1 calculated diagram(s): 872–1080.44 K, x(Ge) 0.625–0.625
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:gd-ge:gd3ge5-beta
tdb: tdb:GdGe-08Che.tdb:GD3GE5_BETA

TDB models of GD3GE5_BETA (1): PHASE and CONSTITUENT statements as written

GdGe-08Che.tdb: GD3GE5_BETA, type code %, sha256 fc48e8e82696745e…

83: PHASE GD3GE5_BETA % 2 3 5 !
84: CONST GD3GE5_BETA : GD : GE : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2007.07.105 Hai-Lin Chen, Yong Du, Cui-Yun He, Thermodynamic modeling of the gadolinium–germanium system, Journal of Alloys and Compounds 462, 181-186 (2008).
assessment that models this phase

GD3GE5_CC (Gd–Ge)

Id: phase:gd-ge:gd3ge5-cc; status needs_review
No structure assigned. Why: stoichiometry_contradicts_C_c:GdGe-08Che.tdb
Candidate (dft_oqmd): P-62c (190) — on-hull OQMD Gd3 Ge5 at x(GE)=0.6250
Candidate (name_token): Si2Th · C_c · tI12 · I4_1/amd (141) — Strukturbericht/word 'CC' in the TDB name
Candidate (sgte_mmc2): Si2Th · C_c · tI12 · I4_1/amd (141) — Hallstedt 2025 mmc2 row for GD3GE5_CC: Gd3Ge5-alpha
Candidate (tdb_comment): Si2Th · tI12 · I4_1/amd — GdGe-08Che.tdb: 'Prototype Si2Th (tI12, I4_1/amd)'
Stoichiometry: Gd 0.3750, Ge 0.6250
Stability: stable in 1 of 1 calculated diagram(s): 300–872 K, x(Ge) 0.625–0.625
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:gd-ge:gd3ge5-cc
tdb: tdb:GdGe-08Che.tdb:GD3GE5_CC

TDB models of GD3GE5_CC (1): PHASE and CONSTITUENT statements as written

GdGe-08Che.tdb: GD3GE5_CC, type code %, sha256 fc48e8e82696745e…

78: PHASE GD3GE5_CC % 2 3 5 !
79: CONST GD3GE5_CC : GD : GE : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2007.07.105 Hai-Lin Chen, Yong Du, Cui-Yun He, Thermodynamic modeling of the gadolinium–germanium system, Journal of Alloys and Compounds 462, 181-186 (2008).
assessment that models this phase

GD5GE3_D88 (Gd–Ge)

Id: phase:gd-ge:gd5ge3-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: Gd 0.6250, Ge 0.3750
Stability: stable in 1 of 1 calculated diagram(s): 300–2063.04 K, x(Ge) 0.375–0.375
Literature: 10 values (10 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:gd-ge:gd5ge3-d88
paper: paper:10.1016/j.jallcom.2007.07.105:Gd5Ge3, paper:10.1016/j.jallcom.2007.07.105:β-Gd5Ge3
tdb: tdb:GdGe-08Che.tdb:GD5GE3_D88

TDB models of GD5GE3_D88 (1): PHASE and CONSTITUENT statements as written

GdGe-08Che.tdb: GD5GE3_D88, type code %, sha256 fc48e8e82696745e…

48: PHASE GD5GE3_D88 % 2 5 3 !
49: CONST GD5GE3_D88 : GD : GE : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2007.07.105 Hai-Lin Chen, Yong Du, Cui-Yun He, Thermodynamic modeling of the gadolinium–germanium system, Journal of Alloys and Compounds 462, 181-186 (2008).
assessment that models this phase; reports values for this phase
doi:10.1007/bf00792035 V. N. Eremenko, V. G. Batalin, Yu. I. Buyanov, I. M. Obushenko, Constitution diagram of the gadolinium-germanium system, Powder Metall Met Ceram 19, 104-108 (1980).
cited as the source of values for this phase
doi:10.1007/bf02881428 A.B. Gokhale, G.J. Abbaschian, The gadolinium–germanium system, Bull. Alloy Phase Diagr. 10 (2) (1989) 147–152, 189–190.
cited as the source of values for this phase

GD5GE4 (Gd–Ge)

Id: phase:gd-ge:gd5ge4; status assigned
Structure: Ge4Sm5 · oP36 · Pnma (62); type st:ge4sm5-op36; 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_oqmd, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Gd 0.5556, Ge 0.4444
Stability: stable in 1 of 1 calculated diagram(s): 300–1962.66 K, x(Ge) 0.44444–0.44444
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:gd-ge:gd5ge4
paper: paper:10.1016/j.jallcom.2007.07.105:Gd5Ge4
tdb: tdb:GdGe-08Che.tdb:GD5GE4

TDB models of GD5GE4 (1): PHASE and CONSTITUENT statements as written

GdGe-08Che.tdb: GD5GE4, type code %, sha256 fc48e8e82696745e…

53: PHASE GD5GE4 % 2 5 4 !
54: CONST GD5GE4 : GD : GE : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2007.07.105 Hai-Lin Chen, Yong Du, Cui-Yun He, Thermodynamic modeling of the gadolinium–germanium system, Journal of Alloys and Compounds 462, 181-186 (2008).
assessment that models this phase; reports values for this phase
doi:10.1007/bf00792035 V. N. Eremenko, V. G. Batalin, Yu. I. Buyanov, I. M. Obushenko, Constitution diagram of the gadolinium-germanium system, Powder Metall Met Ceram 19, 104-108 (1980).
cited as the source of values for this phase

GDGE_B33 (Gd–Ge)

Id: phase:gd-ge:gdge-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-aaaabdmc and oqmd-18848, space group 63
Stoichiometry: Gd 0.5000, Ge 0.5000
Stability: stable in 1 of 1 calculated diagram(s): 300–1843.96 K, x(Ge) 0.5–0.5
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:gd-ge:gdge-b33
mp: mp:mp-aaaabdmc
oqmd: oqmd:oqmd-18848
paper: paper:10.1016/j.jallcom.2007.07.105:GdGe
tdb: tdb:GdGe-08Che.tdb:GDGE_B33

TDB models of GDGE_B33 (1): PHASE and CONSTITUENT statements as written

GdGe-08Che.tdb: GDGE_B33, type code %, sha256 fc48e8e82696745e…

58: PHASE GDGE_B33 % 2 1 1 !
59: CONST GDGE_B33 : GD : GE : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2007.07.105 Hai-Lin Chen, Yong Du, Cui-Yun He, Thermodynamic modeling of the gadolinium–germanium system, Journal of Alloys and Compounds 462, 181-186 (2008).
assessment that models this phase; reports values for this phase
doi:10.1007/bf00792035 V. N. Eremenko, V. G. Batalin, Yu. I. Buyanov, I. M. Obushenko, Constitution diagram of the gadolinium-germanium system, Powder Metall Met Ceram 19, 104-108 (1980).
cited as the source of values for this phase

HCP_A3 (Gd–Ge)

Id: phase:gd-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: stable in 1 of 1 calculated diagram(s): 300–1533.16 K, x(Ge) 0–0
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:gd-ge:hcp-a3
paper: paper:10.1016/j.jallcom.2007.07.105:α-Gd
tdb: tdb:GdGe-08Che.tdb:HCP_A3

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

GdGe-08Che.tdb: HCP_A3, type code %A, sha256 fc48e8e82696745e…

38: PHASE HCP_A3 %A 2 1 0.5 !
39: CONST HCP_A3 : GD% GE : VA: !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2007.07.105 Hai-Lin Chen, Yong Du, Cui-Yun He, Thermodynamic modeling of the gadolinium–germanium system, Journal of Alloys and Compounds 462, 181-186 (2008).
assessment that models this phase; reports values for this phase
doi:10.1007/bf00792035 V. N. Eremenko, V. G. Batalin, Yu. I. Buyanov, I. M. Obushenko, Constitution diagram of the gadolinium-germanium system, Powder Metall Met Ceram 19, 104-108 (1980).
cited as the source of values for this phase

LIQUID (Gd–Ge)

Id: phase:gd-ge:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 1132.59–2500 K, x(Ge) 0–1
Literature: 16 values (16 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:gd-ge:liquid
paper: paper:10.1016/j.jallcom.2007.07.105:L
tdb: tdb:GdGe-08Che.tdb:LIQUID

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

GdGe-08Che.tdb: LIQUID, type code %, sha256 fc48e8e82696745e…

23: PHASE LIQUID:L % 1 1 !
24: CONST LIQUID:L : GD GE : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2007.07.105 Hai-Lin Chen, Yong Du, Cui-Yun He, Thermodynamic modeling of the gadolinium–germanium system, Journal of Alloys and Compounds 462, 181-186 (2008).
assessment that models this phase; reports values for this phase
doi:10.1007/bf00792035 V. N. Eremenko, V. G. Batalin, Yu. I. Buyanov, I. M. Obushenko, Constitution diagram of the gadolinium-germanium system, Powder Metall Met Ceram 19, 104-108 (1980).
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}
}