Gd–Mg phases

12 phases (tier A 9, tier C 1, liquid 1, needs_review 1); 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 · Gd–Mg system page · Markdown · field reference

Phases of the Gd–Mg system (12)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:gd-mg:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 5 of 5 calculated diagram(s): 957.18–1738.74 K, x(Mg) 0–0.40378	12	9
B2_BCC phase:gd-mg:bcc-b2	CsCl · B2 · cP2 · Pm-3m (221)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 300–1601.17 K, x(Mg) 0–0.63792	6	4
C15_LAVES phase:gd-mg:c15-laves	Cu2Mg · C15 · cF24 · Fd-3m (227)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–1029.49 K, x(Mg) 0.64496–0.68325	0	3
D019 phase:gd-mg:d019	Ni3Sn · D0_19 · hP8 · P6_3/mmc (194)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1768 K, x(Mg) 0–1	0	2
FCC_A1 phase:gd-mg:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	not stable in 5 calculated diagram(s)	0	5
GDMG_B2 phase:gd-mg:gdmg-b2	CsCl · B2 · cP2 · Pm-3m (221)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1141.67 K, x(Mg) 0.5–0.5	14	1
GDMG2_C15 phase:gd-mg:gdmg2-c15	Cu2Mg · C15 · cF24 · Fd-3m (227)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1033.16 K, x(Mg) 0.66667–0.66667	15	2
GDMG3_D03 phase:gd-mg:gdmg3-d03	BiF3 · D0_3 · cF16 · Fm-3m (225)	tier A: standard phase name	stable in 5 of 5 calculated diagram(s): 300–993.02 K, x(Mg) 0.73721–0.76378	15	5
GDMG5 phase:gd-mg:gdmg5	Cd45Sm11 · cF448 · F-43m (216)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 5 of 5 calculated diagram(s): 300–929.39 K, x(Mg) 0.83333–0.83921	20	5
GDMG7 phase:gd-mg:gdmg7		needs_review	stable in 2 of 2 calculated diagram(s): 300.54–1768 K, x(Mg) 0–1	0	2
HCP_A3 phase:gd-mg:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 5 of 5 calculated diagram(s): 300–2499.89 K, x(Mg) 0–1	15	7
LIQUID phase:gd-mg:liquid	liquid	liquid	stable in 5 of 5 calculated diagram(s): 820.94–2500 K, x(Mg) 0–1	38	5

BCC_A2 (Gd–Mg)

Id: phase:gd-mg: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 5 of 5 calculated diagram(s): 957.18–1738.74 K, x(Mg) 0–0.40378
Literature: 12 values (12 accepted) from 2 papers
Interactive: phase registry entry

Names (12): corpus: corpus:phase:gd-mg:bcc-a2
paper: paper:10.1016/j.calphad.2006.10.004:bcc(Gd), paper:10.1016/j.jallcom.2013.07.042:(βGd)
tdb: tdb:GdMg-03Cac-LB.tdb:A2_BCC, tdb:GdMg-03Cac-LB.tdb:BCC_A2, tdb:GdMg-07Guo.tdb:A2_BCC, tdb:GdMg-07Guo.tdb:BCC_A2, tdb:GdMg-13Ham.tdb:BCC_A2, tdb:GdMg-20Wu.tdb:A2_BCC, tdb:GdMg-20Wu.tdb:BCC_A2, tdb:GdMg-23Lon.tdb:A2_BCC, tdb:GdMg-23Lon.tdb:BCC_A2

TDB models of BCC_A2 (9): PHASE and CONSTITUENT statements as written

GdMg-03Cac-LB.tdb: A2_BCC, type code %B, sha256 2a611e16bdb52c46…

36: PHASE A2_BCC %B 2 1 3 !
37: CONST A2_BCC : GD MG : VA : !

GdMg-03Cac-LB.tdb: BCC_A2, type code %B, sha256 2a611e16bdb52c46…

31: PHASE BCC_A2 %B 2 1 3 !
32: CONST BCC_A2 : GD MG : VA : !

GdMg-07Guo.tdb: A2_BCC, type code %B, sha256 8626c76defe4bb26…

35: PHASE A2_BCC %B 2 1 3 !
36: CONST A2_BCC : GD MG : VA : !

GdMg-07Guo.tdb: BCC_A2, type code %B, sha256 8626c76defe4bb26…

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

GdMg-13Ham.tdb: BCC_A2, type code %B, sha256 2b5720165997ee54…

37: PHASE BCC_A2 %B 2 1 3 !
38: CONST BCC_A2 : GD MG : VA : !

GdMg-20Wu.tdb: A2_BCC, type code %B, sha256 e4dd7ad023b834f2…

40: PHASE A2_BCC %B 2 1 3 !
41: CONST A2_BCC : GD MG : VA : !

GdMg-20Wu.tdb: BCC_A2, type code %B, sha256 e4dd7ad023b834f2…

35: PHASE BCC_A2 %B 2 1 3 !
36: CONST BCC_A2 : GD MG : VA : !

GdMg-23Lon.tdb: A2_BCC, type code %B, sha256 ee25985fe0b62f39…

44: PHASE A2_BCC %B 2 1 3 !
45: CONST A2_BCC : GD MG : VA : !

GdMg-23Lon.tdb: BCC_A2, type code %B, sha256 ee25985fe0b62f39…

39: PHASE BCC_A2 %B 2 1 3 !
40: CONST BCC_A2 : GD MG : VA : !

Example references (6 of 6; assessments first):

doi:10.1016/j.jallcom.2013.07.042 M. Hampl, C. Blawert, M.R. Silva Campos, N. Hort, Q. Peng, K.U. Kainer et al., Thermodynamic assessment and experimental study of Mg–Gd alloys, Journal of Alloys and Compounds 581, 166-177 (2013).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2006.10.004 Cuiping Guo, Zhenmin Du, Changrong Li, A thermodynamic description of the Gd–Mg–Y system, Calphad 31, 75-88 (2007).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.calphad.2019.101712 X. Wu, C. Li, J. Zheng, Y. Ruan, C. Guo, Z. Du, B. Chen, Y. Wu, Calphad, 68, 101712(2020).
assessment that models this phase
doi:10.1016/j.calphad.2023.102583 Q. Long, N. Meng, F. Chen, L. Zhang, X. Tao, L. Liu, G. Xu, Y. Cui, Calphad, 82, 102583(2023).
assessment that models this phase
doi:10.1016/S0966-9795(03)00151-1 G. Cacciamani, S. De Negri, A. Saccone, R. Ferro, Intermetallics, 11, 1135-51(2003).
assessment that models this phase
doi:10.1016/0022-5088(86)90135-9 P. Manfrinetti, K.A. Gschneidner, Phase equilibrium in the LaMg (0 – 65 at.% Mg) and GdMg systems, Journal of the Less Common Metals 123, 267-275 (1986).
cited as the source of values for this phase

B2_BCC (Gd–Mg)

Id: phase:gd-mg:bcc-b2; status assigned
Structure: CsCl · B2 · cP2 · Pm-3m (221); type st:b2-cscl-cp2; tier A: standard phase name; confidence high
Caveat: GdMg-03Cac-LB.tdb: ordered phase with disordered part A2_BCC (order/disorder model)
Caveat: GdMg-07Guo.tdb: ordered phase with disordered part A2_BCC (order/disorder model)
Caveat: GdMg-20Wu.tdb: ordered phase with disordered part A2_BCC (order/disorder model)
Caveat: GdMg-23Lon.tdb: ordered phase with disordered part A2_BCC (order/disorder model)
Caveat: partitioned order/disorder model in GdMg-03Cac-LB.tdb also describes the disordered state
Caveat: partitioned order/disorder model in GdMg-07Guo.tdb also describes the disordered state
Caveat: partitioned order/disorder model in GdMg-20Wu.tdb also describes the disordered state
Caveat: partitioned order/disorder model in GdMg-23Lon.tdb also describes the disordered state
Stability: stable in 4 of 4 calculated diagram(s): 300–1601.17 K, x(Mg) 0–0.63792
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:gd-mg:bcc-b2, corpus:phase:gd-mg:b2-bcc
paper: paper:10.1016/j.calphad.2006.10.004:MgGd
tdb: tdb:GdMg-03Cac-LB.tdb:B2_BCC, tdb:GdMg-07Guo.tdb:B2_BCC, tdb:GdMg-20Wu.tdb:B2_BCC, tdb:GdMg-23Lon.tdb:B2_BCC

TDB models of B2_BCC (4): PHASE and CONSTITUENT statements as written

GdMg-03Cac-LB.tdb: B2_BCC, type code %O, sha256 2a611e16bdb52c46…

41: PHASE B2_BCC %O 3 0.5 0.5 3 !
42: CONST B2_BCC : GD% MG : GD MG% : VA : !

GdMg-07Guo.tdb: B2_BCC, type code %O, sha256 8626c76defe4bb26…

40: PHASE B2_BCC %O 3 0.5 0.5 3 !
41: CONST B2_BCC : GD% MG : GD MG% : VA : !

GdMg-20Wu.tdb: B2_BCC, type code %O, sha256 e4dd7ad023b834f2…

45: PHASE B2_BCC %O 3 0.5 0.5 3 !
46: CONST B2_BCC : GD% MG : GD MG% : VA : !

GdMg-23Lon.tdb: B2_BCC, type code %O, sha256 ee25985fe0b62f39…

49: PHASE B2_BCC %O 3 0.5 0.5 3 !
50: CONST B2_BCC : GD% MG : GD MG% : VA : !

Example references (5 of 5; assessments first):

doi:10.1016/j.calphad.2006.10.004 Cuiping Guo, Zhenmin Du, Changrong Li, A thermodynamic description of the Gd–Mg–Y system, Calphad 31, 75-88 (2007).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2019.101712 X. Wu, C. Li, J. Zheng, Y. Ruan, C. Guo, Z. Du, B. Chen, Y. Wu, Calphad, 68, 101712(2020).
assessment that models this phase
doi:10.1016/j.calphad.2023.102583 Q. Long, N. Meng, F. Chen, L. Zhang, X. Tao, L. Liu, G. Xu, Y. Cui, Calphad, 82, 102583(2023).
assessment that models this phase
doi:10.1016/S0966-9795(03)00151-1 G. Cacciamani, S. De Negri, A. Saccone, R. Ferro, Intermetallics, 11, 1135-51(2003).
assessment that models this phase
doi:10.1016/0022-5088(86)90135-9 P. Manfrinetti, K.A. Gschneidner, Phase equilibrium in the LaMg (0 – 65 at.% Mg) and GdMg systems, Journal of the Less Common Metals 123, 267-275 (1986).
cited as the source of values for this phase

C15_LAVES (Gd–Mg)

Id: phase:gd-mg:c15-laves; status assigned
Structure: Cu2Mg · C15 · cF24 · Fd-3m (227); type st:c15-cu2mg-cf24; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in GdMg-03Cac-LB.tdb also describes the disordered state
Caveat: partitioned order/disorder model in GdMg-20Wu.tdb also describes the disordered state
Caveat: partitioned order/disorder model in GdMg-23Lon.tdb also describes the disordered state
Stability: stable in 3 of 3 calculated diagram(s): 300–1029.49 K, x(Mg) 0.64496–0.68325
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:gd-mg:c15-laves
tdb: tdb:GdMg-03Cac-LB.tdb:C15_LAVES, tdb:GdMg-20Wu.tdb:C15_LAVES, tdb:GdMg-23Lon.tdb:C15_LAVES

TDB models of C15_LAVES (3): PHASE and CONSTITUENT statements as written

GdMg-03Cac-LB.tdb: C15_LAVES, type code %, sha256 2a611e16bdb52c46…

51: PHASE C15_LAVES % 2 2 1 !
52: CONST C15_LAVES : GD MG% : GD% MG : !

GdMg-20Wu.tdb: C15_LAVES, type code %, sha256 e4dd7ad023b834f2…

66: PHASE C15_LAVES % 2 2 1 !
67: CONST C15_LAVES : GD MG% : GD% MG : !

GdMg-23Lon.tdb: C15_LAVES, type code %, sha256 ee25985fe0b62f39…

70: PHASE C15_LAVES % 2 2 1 !
71: CONST C15_LAVES : GD MG% : GD% MG : !

Example references (3 of 3; assessments first):

doi:10.1016/j.calphad.2019.101712 X. Wu, C. Li, J. Zheng, Y. Ruan, C. Guo, Z. Du, B. Chen, Y. Wu, Calphad, 68, 101712(2020).
assessment that models this phase
doi:10.1016/j.calphad.2023.102583 Q. Long, N. Meng, F. Chen, L. Zhang, X. Tao, L. Liu, G. Xu, Y. Cui, Calphad, 82, 102583(2023).
assessment that models this phase
doi:10.1016/S0966-9795(03)00151-1 G. Cacciamani, S. De Negri, A. Saccone, R. Ferro, Intermetallics, 11, 1135-51(2003).
assessment that models this phase

D019 (Gd–Mg)

Id: phase:gd-mg:d019; status assigned
Structure: Ni3Sn · D0_19 · hP8 · P6_3/mmc (194); type st:d0-19-ni3sn-hp8; tier A: standard phase name; confidence high
Caveat: GdMg-20Wu.tdb: ordered phase with disordered part A3_HCP (order/disorder model)
Caveat: GdMg-23Lon.tdb: ordered phase with disordered part A3_HCP (order/disorder model)
Caveat: partitioned order/disorder model in GdMg-20Wu.tdb also describes the disordered state
Caveat: partitioned order/disorder model in GdMg-23Lon.tdb also describes the disordered state
Stability: stable in 2 of 2 calculated diagram(s): 300–1768 K, x(Mg) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:gd-mg:d019
tdb: tdb:GdMg-20Wu.tdb:D019, tdb:GdMg-23Lon.tdb:D019

TDB models of D019 (2): PHASE and CONSTITUENT statements as written

GdMg-20Wu.tdb: D019, type code %AP, sha256 e4dd7ad023b834f2…

58: PHASE D019 %AP 3 0.75 0.25 0.5 !
59: CONST D019 : GD MG% : GD% MG : VA : !

GdMg-23Lon.tdb: D019, type code %AP, sha256 ee25985fe0b62f39…

62: PHASE D019 %AP 3 0.75 0.25 0.5 !
63: CONST D019 : GD MG% : GD% MG : VA : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2019.101712 X. Wu, C. Li, J. Zheng, Y. Ruan, C. Guo, Z. Du, B. Chen, Y. Wu, Calphad, 68, 101712(2020).
assessment that models this phase
doi:10.1016/j.calphad.2023.102583 Q. Long, N. Meng, F. Chen, L. Zhang, X. Tao, L. Liu, G. Xu, Y. Cui, Calphad, 82, 102583(2023).
assessment that models this phase

FCC_A1 (Gd–Mg)

Id: phase:gd-mg: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 5 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:gd-mg:fcc-a1
tdb: tdb:GdMg-03Cac-LB.tdb:FCC_A1, tdb:GdMg-07Guo.tdb:FCC_A1, tdb:GdMg-13Ham.tdb:FCC_A1, tdb:GdMg-20Wu.tdb:FCC_A1, tdb:GdMg-23Lon.tdb:FCC_A1

TDB models of FCC_A1 (5): PHASE and CONSTITUENT statements as written

GdMg-03Cac-LB.tdb: FCC_A1, type code %A, sha256 2a611e16bdb52c46…

26: PHASE FCC_A1 %A 2 1 1 !
27: CONST FCC_A1 : GD MG : VA : !

GdMg-07Guo.tdb: FCC_A1, type code %A, sha256 8626c76defe4bb26…

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

GdMg-13Ham.tdb: FCC_A1, type code %A, sha256 2b5720165997ee54…

32: PHASE FCC_A1 %A 2 1 1 !
33: CONST FCC_A1 : GD MG : VA : !

GdMg-20Wu.tdb: FCC_A1, type code %A, sha256 e4dd7ad023b834f2…

30: PHASE FCC_A1 %A 2 1 1 !
31: CONST FCC_A1 : GD MG : VA : !

GdMg-23Lon.tdb: FCC_A1, type code %A, sha256 ee25985fe0b62f39…

34: PHASE FCC_A1 %A 2 1 1 !
35: CONST FCC_A1 : GD MG : VA : !

Example references (5 of 5; assessments first):

doi:10.1016/j.calphad.2006.10.004 Cuiping Guo, Zhenmin Du, Changrong Li, A thermodynamic description of the Gd–Mg–Y system, Calphad 31, 75-88 (2007).
assessment that models this phase
doi:10.1016/j.calphad.2019.101712 X. Wu, C. Li, J. Zheng, Y. Ruan, C. Guo, Z. Du, B. Chen, Y. Wu, Calphad, 68, 101712(2020).
assessment that models this phase
doi:10.1016/j.calphad.2023.102583 Q. Long, N. Meng, F. Chen, L. Zhang, X. Tao, L. Liu, G. Xu, Y. Cui, Calphad, 82, 102583(2023).
assessment that models this phase
doi:10.1016/j.jallcom.2013.07.042 M. Hampl, C. Blawert, M.R. Silva Campos, N. Hort, Q. Peng, K.U. Kainer et al., Thermodynamic assessment and experimental study of Mg–Gd alloys, Journal of Alloys and Compounds 581, 166-177 (2013).
assessment that models this phase
doi:10.1016/S0966-9795(03)00151-1 G. Cacciamani, S. De Negri, A. Saccone, R. Ferro, Intermetallics, 11, 1135-51(2003).
assessment that models this phase

GDMG_B2 (Gd–Mg)

Id: phase:gd-mg:gdmg-b2; status assigned
Structure: CsCl · B2 · cP2 · Pm-3m (221); type st:b2-cscl-cp2; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaaadxk and oqmd-20466, space group 221
Stoichiometry: Gd 0.5000, Mg 0.5000
Stability: stable in 1 of 1 calculated diagram(s): 300–1141.67 K, x(Mg) 0.5–0.5
Literature: 14 values (14 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:gd-mg:gdmg-b2
mp: mp:mp-aaaaadxk
oqmd: oqmd:oqmd-20466
paper: paper:10.1016/j.jallcom.2013.07.042:GdMg
tdb: tdb:GdMg-13Ham.tdb:GDMG_B2

TDB models of GDMG_B2 (1): PHASE and CONSTITUENT statements as written

GdMg-13Ham.tdb: GDMG_B2, type code %, sha256 2b5720165997ee54…

47: PHASE GDMG_B2 % 2 1 1 !
48: CONST GDMG_B2 : GD : MG : !

Example references (4 of 4; assessments first):

doi:10.1016/j.jallcom.2013.07.042 M. Hampl, C. Blawert, M.R. Silva Campos, N. Hort, Q. Peng, K.U. Kainer et al., Thermodynamic assessment and experimental study of Mg–Gd alloys, Journal of Alloys and Compounds 581, 166-177 (2013).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-5088(86)90135-9 P. Manfrinetti, K.A. Gschneidner, Phase equilibrium in the LaMg (0 – 65 at.% Mg) and GdMg systems, Journal of the Less Common Metals 123, 267-275 (1986).
cited as the source of values for this phase
doi:10.1016/j.calphad.2006.10.004 Cuiping Guo, Zhenmin Du, Changrong Li, A thermodynamic description of the Gd–Mg–Y system, Calphad 31, 75-88 (2007).
cited as the source of values for this phase
doi:10.1063/1.2202923 Y. Janssen, M. Angst, K. W. Dennis, P. C. Canfield, R. W. McCallum, Small sealed Ta crucible for thermal analysis of volatile metallic samples, Review of Scientific Instruments 77 (2006).
cited as the source of values for this phase

GDMG2_C15 (Gd–Mg)

Id: phase:gd-mg:gdmg2-c15; status assigned
Structure: Cu2Mg · C15 · cF24 · Fd-3m (227); type st:c15-cu2mg-cf24; tier A: standard phase name; confidence high
Stoichiometry: Gd 0.3333, Mg 0.6667
Stability: stable in 2 of 2 calculated diagram(s): 300–1033.16 K, x(Mg) 0.66667–0.66667
Literature: 15 values (15 accepted) from 2 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:gd-mg:gdmg2-c15
paper: paper:10.1016/j.calphad.2006.10.004:Mg2Gd, paper:10.1016/j.jallcom.2013.07.042:GdMg2
tdb: tdb:GdMg-07Guo.tdb:GDMG2_C15, tdb:GdMg-13Ham.tdb:GDMG2_C15

TDB models of GDMG2_C15 (2): PHASE and CONSTITUENT statements as written

GdMg-07Guo.tdb: GDMG2_C15, type code %, sha256 8626c76defe4bb26…

50: PHASE GDMG2_C15 % 2 1 2 !
51: CONST GDMG2_C15 : GD : MG : !

GdMg-13Ham.tdb: GDMG2_C15, type code %, sha256 2b5720165997ee54…

52: PHASE GDMG2_C15 % 2 1 2 !
53: CONST GDMG2_C15 : GD : MG : !

Example references (4 of 4; assessments first):

doi:10.1016/j.jallcom.2013.07.042 M. Hampl, C. Blawert, M.R. Silva Campos, N. Hort, Q. Peng, K.U. Kainer et al., Thermodynamic assessment and experimental study of Mg–Gd alloys, Journal of Alloys and Compounds 581, 166-177 (2013).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2006.10.004 Cuiping Guo, Zhenmin Du, Changrong Li, A thermodynamic description of the Gd–Mg–Y system, Calphad 31, 75-88 (2007).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/0022-5088(86)90135-9 P. Manfrinetti, K.A. Gschneidner, Phase equilibrium in the LaMg (0 – 65 at.% Mg) and GdMg systems, Journal of the Less Common Metals 123, 267-275 (1986).
cited as the source of values for this phase
doi:10.1063/1.2202923 Y. Janssen, M. Angst, K. W. Dennis, P. C. Canfield, R. W. McCallum, Small sealed Ta crucible for thermal analysis of volatile metallic samples, Review of Scientific Instruments 77 (2006).
cited as the source of values for this phase

GDMG3_D03 (Gd–Mg)

Id: phase:gd-mg:gdmg3-d03; status assigned
Structure: BiF3 · D0_3 · cF16 · Fm-3m (225); type st:d0-3-bif3-cf16; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in GdMg-20Wu.tdb also describes the disordered state
Caveat: partitioned order/disorder model in GdMg-23Lon.tdb also describes the disordered state
Stability: stable in 5 of 5 calculated diagram(s): 300–993.02 K, x(Mg) 0.73721–0.76378
Literature: 15 values (15 accepted) from 2 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:gd-mg:gdmg3-d03
paper: paper:10.1016/j.calphad.2006.10.004:Mg3Gd, paper:10.1016/j.jallcom.2013.07.042:GdMg3
tdb: tdb:GdMg-03Cac-LB.tdb:GDMG3_D03, tdb:GdMg-07Guo.tdb:GDMG3_D03, tdb:GdMg-13Ham.tdb:GDMG3_D03, tdb:GdMg-20Wu.tdb:GDMG3_D03, tdb:GdMg-23Lon.tdb:GDMG3_D03

TDB models of GDMG3_D03 (5): PHASE and CONSTITUENT statements as written

GdMg-03Cac-LB.tdb: GDMG3_D03, type code %, sha256 2a611e16bdb52c46…

56: PHASE GDMG3_D03 % 2 1 3 !
57: CONST GDMG3_D03 : GD : MG : !

GdMg-07Guo.tdb: GDMG3_D03, type code %, sha256 8626c76defe4bb26…

55: PHASE GDMG3_D03 % 2 1 3 !
56: CONST GDMG3_D03 : GD : MG : !

GdMg-13Ham.tdb: GDMG3_D03, type code %, sha256 2b5720165997ee54…

57: PHASE GDMG3_D03 % 2 1 3 !
58: CONST GDMG3_D03 : GD : MG : !

GdMg-20Wu.tdb: GDMG3_D03, type code %, sha256 e4dd7ad023b834f2…

71: PHASE GDMG3_D03 % 2 1 3 !
72: CONST GDMG3_D03 : GD% MG : GD MG% : !

GdMg-23Lon.tdb: GDMG3_D03, type code %, sha256 ee25985fe0b62f39…

75: PHASE GDMG3_D03 % 2 1 3 !
76: CONST GDMG3_D03 : GD% MG : GD MG% : !

Example references (6 of 6; assessments first):

doi:10.1016/j.jallcom.2013.07.042 M. Hampl, C. Blawert, M.R. Silva Campos, N. Hort, Q. Peng, K.U. Kainer et al., Thermodynamic assessment and experimental study of Mg–Gd alloys, Journal of Alloys and Compounds 581, 166-177 (2013).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2006.10.004 Cuiping Guo, Zhenmin Du, Changrong Li, A thermodynamic description of the Gd–Mg–Y system, Calphad 31, 75-88 (2007).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.calphad.2019.101712 X. Wu, C. Li, J. Zheng, Y. Ruan, C. Guo, Z. Du, B. Chen, Y. Wu, Calphad, 68, 101712(2020).
assessment that models this phase
doi:10.1016/j.calphad.2023.102583 Q. Long, N. Meng, F. Chen, L. Zhang, X. Tao, L. Liu, G. Xu, Y. Cui, Calphad, 82, 102583(2023).
assessment that models this phase
doi:10.1016/S0966-9795(03)00151-1 G. Cacciamani, S. De Negri, A. Saccone, R. Ferro, Intermetallics, 11, 1135-51(2003).
assessment that models this phase
doi:10.1016/0022-5088(86)90135-9 P. Manfrinetti, K.A. Gschneidner, Phase equilibrium in the LaMg (0 – 65 at.% Mg) and GdMg systems, Journal of the Less Common Metals 123, 267-275 (1986).
cited as the source of values for this phase

GDMG5 (Gd–Mg)

Id: phase:gd-mg:gdmg5; status assigned
Structure: Cd45Sm11 · cF448 · F-43m (216); type st:cd45sm11-cf448; 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, off_stoichiometric_model); structure as stated in the SGTE crystallographic table for this phase name and system
Stability: stable in 5 of 5 calculated diagram(s): 300–929.39 K, x(Mg) 0.83333–0.83921
Literature: 20 values (20 accepted) from 4 papers
Interactive: phase registry entry

Names (10): corpus: corpus:phase:gd-mg:gdmg5
paper: paper:10.1016/j.actamat.2015.02.044:GdMg5, paper:10.1016/j.calphad.2006.10.004:Mg5Gd, paper:10.1016/j.jallcom.2013.07.042:GdMg5, paper:10.1361/105497101770339274:GdMg5
tdb: tdb:GdMg-03Cac-LB.tdb:GDMG5, tdb:GdMg-07Guo.tdb:GDMG5, tdb:GdMg-13Ham.tdb:GDMG5, tdb:GdMg-20Wu.tdb:GDMG5, tdb:GdMg-23Lon.tdb:GDMG5

TDB models of GDMG5 (5): PHASE and CONSTITUENT statements as written

GdMg-03Cac-LB.tdb: GDMG5, type code %, sha256 2a611e16bdb52c46…

61: PHASE GDMG5 % 2 1 5 !
62: CONST GDMG5 : GD : MG : !

GdMg-07Guo.tdb: GDMG5, type code %, sha256 8626c76defe4bb26…

60: PHASE GDMG5 % 2 1 5 !
61: CONST GDMG5 : GD : MG : !

GdMg-13Ham.tdb: GDMG5, type code %, sha256 2b5720165997ee54…

62: PHASE GDMG5 % 2 1 5 !
63: CONST GDMG5 : GD : MG : !

GdMg-20Wu.tdb: GDMG5, type code %, sha256 e4dd7ad023b834f2…

76: PHASE GDMG5 % 2 1 5 !
77: CONST GDMG5 : GD% MG : MG : !

GdMg-23Lon.tdb: GDMG5, type code %, sha256 ee25985fe0b62f39…

80: PHASE GDMG5 % 2 1 5 !
81: CONST GDMG5 : GD% MG : MG : !

Example references (10 of 10; assessments first):

doi:10.1016/j.jallcom.2013.07.042 M. Hampl, C. Blawert, M.R. Silva Campos, N. Hort, Q. Peng, K.U. Kainer et al., Thermodynamic assessment and experimental study of Mg–Gd alloys, Journal of Alloys and Compounds 581, 166-177 (2013).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2006.10.004 Cuiping Guo, Zhenmin Du, Changrong Li, A thermodynamic description of the Gd–Mg–Y system, Calphad 31, 75-88 (2007).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.calphad.2019.101712 X. Wu, C. Li, J. Zheng, Y. Ruan, C. Guo, Z. Du, B. Chen, Y. Wu, Calphad, 68, 101712(2020).
assessment that models this phase
doi:10.1016/j.calphad.2023.102583 Q. Long, N. Meng, F. Chen, L. Zhang, X. Tao, L. Liu, G. Xu, Y. Cui, Calphad, 82, 102583(2023).
assessment that models this phase
doi:10.1016/S0966-9795(03)00151-1 G. Cacciamani, S. De Negri, A. Saccone, R. Ferro, Intermetallics, 11, 1135-51(2003).
assessment that models this phase
doi:10.1016/0022-5088(86)90135-9 P. Manfrinetti, K.A. Gschneidner, Phase equilibrium in the LaMg (0 – 65 at.% Mg) and GdMg systems, Journal of the Less Common Metals 123, 267-275 (1986).
cited as the source of values for this phase
doi:10.1016/j.actamat.2015.02.044 Joachim Gröbner, Artem Kozlov, Xi-Ya Fang, Suming Zhu, Jian-Feng Nie, Mark A. Gibson et al., Phase equilibria and transformations in ternary Mg–Gd–Zn alloys, Acta Materialia 90, 400-416 (2015).
reports values for this phase
doi:10.1016/j.calphad.2008.08.004 W. Cao, S. Chen, F. Zhang, K. Wu, Y. Yang, Y. Chang, R. Schmid-Fetzer, W.A. Oates, Calphad 33 (2009) 328.
cited as the source of values for this phase
doi:10.1107/s0108270186097019 M. L. Fornasini, P. Manfrinetti, K. A. Gschneidner Jnr, GdMg5: a complex structure with a large cubic cell, Acta Crystallogr C Cryst Struct Commun 42, 138-141 (1986).
cited as the source of values for this phase
doi:10.1361/105497101770339274 D. G. Kevorkov, J. Gröbner, R. Schmid-Fetzer, V. V. Pavlyuk, G. S. Dmytriv, O. I. Bodak, The ternary Gd-Li-Mg system: Phase diagram study and computational evaluation, JPE 22, 34-42 (2001).
reports values for this phase

GDMG7 (Gd–Mg)

Id: phase:gd-mg:gdmg7; status needs_review
No structure assigned. Why: no_structure_token; off_stoichiometric_model
Candidate (dft_mp): Pm-3m (221) — on-hull MP GdMg at x(MG)=0.5000
Candidate (dft_mp): Fm-3m (225) — on-hull MP GdMg3 at x(MG)=0.7500
Candidate (dft_oqmd): Pm-3m (221) — on-hull OQMD Gd1 Mg1 at x(MG)=0.5000
Candidate (dft_oqmd): Pmmn (59) — on-hull OQMD Gd1 Mg3 at x(MG)=0.7500
Candidate (dft_oqmd): Cmcm (63) — on-hull OQMD Gd2 Mg1 at x(MG)=0.3333
Stability: stable in 2 of 2 calculated diagram(s): 300.54–1768 K, x(Mg) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:gd-mg:gdmg7
tdb: tdb:GdMg-20Wu.tdb:GDMG7, tdb:GdMg-23Lon.tdb:GDMG7

TDB models of GDMG7 (2): PHASE and CONSTITUENT statements as written

GdMg-20Wu.tdb: GDMG7, type code %AQ, sha256 e4dd7ad023b834f2…

61: PHASE GDMG7 %AQ 3 0.875 0.125 0.5 !
62: CONST GDMG7 : GD MG% : GD% MG : VA : !

GdMg-23Lon.tdb: GDMG7, type code %AQ, sha256 ee25985fe0b62f39…

65: PHASE GDMG7 %AQ 3 0.875 0.125 0.5 !
66: CONST GDMG7 : GD MG% : GD% MG : VA : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2019.101712 X. Wu, C. Li, J. Zheng, Y. Ruan, C. Guo, Z. Du, B. Chen, Y. Wu, Calphad, 68, 101712(2020).
assessment that models this phase
doi:10.1016/j.calphad.2023.102583 Q. Long, N. Meng, F. Chen, L. Zhang, X. Tao, L. Liu, G. Xu, Y. Cui, Calphad, 82, 102583(2023).
assessment that models this phase

HCP_A3 (Gd–Mg)

Id: phase:gd-mg: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 5 of 5 calculated diagram(s): 300–2499.89 K, x(Mg) 0–1
Literature: 15 values (15 accepted) from 2 papers
Interactive: phase registry entry

Names (12): corpus: corpus:phase:gd-mg:hcp-a3
paper: paper:10.1016/j.calphad.2006.10.004:hcp(Gd), paper:10.1016/j.calphad.2006.10.004:hcp(Mg), paper:10.1016/j.jallcom.2013.07.042:(Mg), paper:10.1016/j.jallcom.2013.07.042:(αGd)
tdb: tdb:GdMg-03Cac-LB.tdb:HCP_A3, tdb:GdMg-07Guo.tdb:HCP_A3, tdb:GdMg-13Ham.tdb:HCP_A3, tdb:GdMg-20Wu.tdb:A3_HCP, tdb:GdMg-20Wu.tdb:HCP_A3, tdb:GdMg-23Lon.tdb:A3_HCP, tdb:GdMg-23Lon.tdb:HCP_A3

TDB models of HCP_A3 (7): PHASE and CONSTITUENT statements as written

GdMg-03Cac-LB.tdb: HCP_A3, type code %A, sha256 2a611e16bdb52c46…

46: PHASE HCP_A3 %A 2 1 0.5 !
47: CONST HCP_A3 : GD MG : VA : !

GdMg-07Guo.tdb: HCP_A3, type code %A, sha256 8626c76defe4bb26…

45: PHASE HCP_A3 %A 2 1 0.5 !
46: CONST HCP_A3 : GD MG : VA : !

GdMg-13Ham.tdb: HCP_A3, type code %A, sha256 2b5720165997ee54…

42: PHASE HCP_A3 %A 2 1 0.5 !
43: CONST HCP_A3 : GD MG : VA : !

GdMg-20Wu.tdb: A3_HCP, type code %A, sha256 e4dd7ad023b834f2…

55: PHASE A3_HCP %A 2 1 0.5 !
56: CONST A3_HCP : GD MG : VA : !

GdMg-20Wu.tdb: HCP_A3, type code %A, sha256 e4dd7ad023b834f2…

50: PHASE HCP_A3 %A 2 1 0.5 !
51: CONST HCP_A3 : GD MG : VA : !

GdMg-23Lon.tdb: A3_HCP, type code %A, sha256 ee25985fe0b62f39…

59: PHASE A3_HCP %A 2 1 0.5 !
60: CONST A3_HCP : GD MG : VA : !

GdMg-23Lon.tdb: HCP_A3, type code %A, sha256 ee25985fe0b62f39…

54: PHASE HCP_A3 %A 2 1 0.5 !
55: CONST HCP_A3 : GD MG : VA : !

Example references (6 of 6; assessments first):

doi:10.1016/j.jallcom.2013.07.042 M. Hampl, C. Blawert, M.R. Silva Campos, N. Hort, Q. Peng, K.U. Kainer et al., Thermodynamic assessment and experimental study of Mg–Gd alloys, Journal of Alloys and Compounds 581, 166-177 (2013).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2006.10.004 Cuiping Guo, Zhenmin Du, Changrong Li, A thermodynamic description of the Gd–Mg–Y system, Calphad 31, 75-88 (2007).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.calphad.2019.101712 X. Wu, C. Li, J. Zheng, Y. Ruan, C. Guo, Z. Du, B. Chen, Y. Wu, Calphad, 68, 101712(2020).
assessment that models this phase
doi:10.1016/j.calphad.2023.102583 Q. Long, N. Meng, F. Chen, L. Zhang, X. Tao, L. Liu, G. Xu, Y. Cui, Calphad, 82, 102583(2023).
assessment that models this phase
doi:10.1016/S0966-9795(03)00151-1 G. Cacciamani, S. De Negri, A. Saccone, R. Ferro, Intermetallics, 11, 1135-51(2003).
assessment that models this phase
doi:10.1016/0022-5088(86)90135-9 P. Manfrinetti, K.A. Gschneidner, Phase equilibrium in the LaMg (0 – 65 at.% Mg) and GdMg systems, Journal of the Less Common Metals 123, 267-275 (1986).
cited as the source of values for this phase

LIQUID (Gd–Mg)

Id: phase:gd-mg:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 5 of 5 calculated diagram(s): 820.94–2500 K, x(Mg) 0–1
Literature: 38 values (38 accepted) from 2 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:gd-mg:liquid
paper: paper:10.1016/j.calphad.2006.10.004:L, paper:10.1016/j.jallcom.2013.07.042:L
tdb: tdb:GdMg-03Cac-LB.tdb:LIQUID, tdb:GdMg-07Guo.tdb:LIQUID, tdb:GdMg-13Ham.tdb:LIQUID, tdb:GdMg-20Wu.tdb:LIQUID, tdb:GdMg-23Lon.tdb:LIQUID

TDB models of LIQUID (5): PHASE and CONSTITUENT statements as written

GdMg-03Cac-LB.tdb: LIQUID, type code %, sha256 2a611e16bdb52c46…

21: PHASE LIQUID:L % 1 1 !
22: CONST LIQUID:L : GD MG : !

GdMg-07Guo.tdb: LIQUID, type code %, sha256 8626c76defe4bb26…

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

GdMg-13Ham.tdb: LIQUID, type code %, sha256 2b5720165997ee54…

27: PHASE LIQUID:L % 1 1 !
28: CONST LIQUID:L : GD MG : !

GdMg-20Wu.tdb: LIQUID, type code %, sha256 e4dd7ad023b834f2…

25: PHASE LIQUID:L % 1 1 !
26: CONST LIQUID:L : GD MG : !

GdMg-23Lon.tdb: LIQUID, type code %, sha256 ee25985fe0b62f39…

29: PHASE LIQUID:L % 1 1 !
30: CONST LIQUID:L : GD MG : !

Example references (7 of 7; assessments first):

doi:10.1016/j.jallcom.2013.07.042 M. Hampl, C. Blawert, M.R. Silva Campos, N. Hort, Q. Peng, K.U. Kainer et al., Thermodynamic assessment and experimental study of Mg–Gd alloys, Journal of Alloys and Compounds 581, 166-177 (2013).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2006.10.004 Cuiping Guo, Zhenmin Du, Changrong Li, A thermodynamic description of the Gd–Mg–Y system, Calphad 31, 75-88 (2007).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.calphad.2019.101712 X. Wu, C. Li, J. Zheng, Y. Ruan, C. Guo, Z. Du, B. Chen, Y. Wu, Calphad, 68, 101712(2020).
assessment that models this phase
doi:10.1016/j.calphad.2023.102583 Q. Long, N. Meng, F. Chen, L. Zhang, X. Tao, L. Liu, G. Xu, Y. Cui, Calphad, 82, 102583(2023).
assessment that models this phase
doi:10.1016/S0966-9795(03)00151-1 G. Cacciamani, S. De Negri, A. Saccone, R. Ferro, Intermetallics, 11, 1135-51(2003).
assessment that models this phase
doi:10.1016/0022-5088(86)90135-9 P. Manfrinetti, K.A. Gschneidner, Phase equilibrium in the LaMg (0 – 65 at.% Mg) and GdMg systems, Journal of the Less Common Metals 123, 267-275 (1986).
cited as the source of values for this phase
doi:10.1063/1.2202923 Y. Janssen, M. Angst, K. W. Dennis, P. C. Canfield, R. W. McCallum, Small sealed Ta crucible for thermal analysis of volatile metallic samples, Review of Scientific Instruments 77 (2006).
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}
}