Fe–Mo phases

11 phases (tier A 9, tier C 1, liquid 1); 10 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 · Fe–Mo system page · Markdown · field reference

Phases of the Fe–Mo system (11)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:fe-mo:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 300–3999.95 K, x(Mo) 0–1	17	4
C14_LAVES phase:fe-mo:c14-laves	MgZn2 · C14 · hP12 · P6_3/mmc (194)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–1204.02 K, x(Mo) 0.33101–0.33703	12	3
MU_D85 phase:fe-mo:d85-mu	Fe7W6 · D8_5 · hR13 · R-3m (166)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 300–1644.56 K, x(Mo) 0.37812–0.46154	21	4
SIGMA_D8B phase:fe-mo:d8b-sigma	sigma-CrFe · D8_b · tP30 · P4_2/mnm (136)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 1507.91–1884.54 K, x(Mo) 0.42912–0.56686	22	3
FCC_A1 phase:fe-mo:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 833.32–1814.82 K, x(Mo) 0–0.02224	0	4
FE2MO_C14 phase:fe-mo:fe2mo-c14	MgZn2 · C14 · hP12 · P6_3/mmc (194)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1165.9 K, x(Mo) 0.16–0.42	0	2
HCP_A3 phase:fe-mo:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	not stable in 4 calculated diagram(s)	0	4
LIQUID phase:fe-mo:liquid	liquid	liquid	stable in 4 of 4 calculated diagram(s): 1719.1–4000 K, x(Mo) 0–1	18	4
MU_OLD phase:fe-mo:mu-old	Fe7W6 · D8_5 · hR13 · R-3m (166)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1641.49 K, x(Mo) 0.38701–0.46154	0	1
SIGMA_OLD phase:fe-mo:old-sigma	sigma-CrFe · D8_b · tP30 · P4_2/mnm (136)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 1535.54–1884.66 K, x(Mo) 0.42926–0.56609	0	2
R_PHASE phase:fe-mo:phase-r	R-(Co,Cr,Mo) · hR53 · R-3 (148)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 4 of 4 calculated diagram(s): 1466.05–1771.51 K, x(Mo) 0.33039–0.38897	18	4

BCC_A2 (Fe–Mo)

Id: phase:fe-mo: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 4 of 4 calculated diagram(s): 300–3999.95 K, x(Mo) 0–1
Literature: 17 values (17 accepted) from 1 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:fe-mo:bcc-a2
paper: paper:10.1016/j.jallcom.2014.05.030:(Mo), paper:10.1016/j.jallcom.2014.05.030:(αFe)
tdb: tdb:FeMo-14Raj.tdb:BCC_A2, tdb:FeMo-20Tak.tdb:BCC_A2, tdb:FeMo-82Fer.tdb:BCC_A2, tdb:FeMo-88And-LB.tdb:BCC_A2

TDB models of BCC_A2 (4): PHASE and CONSTITUENT statements as written

FeMo-14Raj.tdb: BCC_A2, type code %B, sha256 1e573137abd4fa18…

34: PHASE BCC_A2 %B 2 1 3 !
35: CONST BCC_A2 : FE MO : VA : !

FeMo-20Tak.tdb: BCC_A2, type code %B, sha256 fb163dec4400b1e5…

32: PHASE BCC_A2 %B 2 1 3 !
33: CONST BCC_A2 : FE MO : VA : !

FeMo-82Fer.tdb: BCC_A2, type code %B, sha256 f5329b78d65288a2…

40: PHASE BCC_A2 %B 2 1 3 !
41: CONST BCC_A2 : FE MO : VA : !

FeMo-88And-LB.tdb: BCC_A2, type code %B, sha256 bfba496e34ac804b…

60: PHASE BCC_A2 %B 2 1 3 !
61: CONST BCC_A2 : FE MO : VA : !

Example references (5 of 5; assessments first):

doi:10.1016/j.jallcom.2014.05.030 V.B. Rajkumar, K.C. Hari Kumar, Thermodynamic modeling of the Fe–Mo system coupled with experiments and ab initio calculations, Journal of Alloys and Compounds 611, 303-312 (2014).
assessment that models this phase; reports values for this phase
doi:10.1016/0364-5916(82)90008-6 Armando Fernandez Guillermet, An assessment of the FeMo system, Calphad 6, 127-140 (1982).
assessment that models this phase
doi:10.1016/0364-5916(88)90025-9 Jan-Olof Andersson, A thermodynamic evaluation of the FeMoC system, Calphad 12, 9-23 (1988).
assessment that models this phase
doi:10.2355/tetsutohagane.TETSU-2019-097 K. Takahashi, K. Ishikawa, M. Fujioka, M. Enoki, H. Ohtani, Tetsu-to-Hagane, 106, 310-20(2020).
assessment that models this phase
doi:10.1016/0022-5088(74)90012-5 C.P. Heijwegen, G.D. Rieck, Determination of the phase diagram of the MoFe system using diffusion couples, Journal of the Less Common Metals 37, 115-121 (1974).
cited as the source of values for this phase

C14_LAVES (Fe–Mo)

Id: phase:fe-mo:c14-laves; 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 FeMo-14Raj.tdb also describes the disordered state
Caveat: partitioned order/disorder model in FeMo-88And-LB.tdb also describes the disordered state
Stability: stable in 3 of 3 calculated diagram(s): 300–1204.02 K, x(Mo) 0.33101–0.33703
Literature: 12 values (12 accepted) from 1 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:fe-mo:c14-laves
paper: paper:10.1016/j.jallcom.2014.05.030:Fe2Mo (λ), paper:10.1016/j.jallcom.2014.05.030:λ
tdb: tdb:FeMo-14Raj.tdb:C14_LAVES, tdb:FeMo-82Fer.tdb:C14_LAVES, tdb:FeMo-88And-LB.tdb:C14_LAVES

TDB models of C14_LAVES (3): PHASE and CONSTITUENT statements as written

FeMo-14Raj.tdb: C14_LAVES, type code %, sha256 1e573137abd4fa18…

44: PHASE C14_LAVES % 2 2 1 !
45: CONST C14_LAVES : FE% MO : FE MO% : !

FeMo-82Fer.tdb: C14_LAVES, type code %, sha256 f5329b78d65288a2…

50: PHASE C14_LAVES % 2 2 1 !
51: CONST C14_LAVES : FE : MO : !

FeMo-88And-LB.tdb: C14_LAVES, type code %, sha256 bfba496e34ac804b…

75: PHASE C14_LAVES % 2 2 1 !
76: CONST C14_LAVES : FE% MO : FE MO% : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2014.05.030 V.B. Rajkumar, K.C. Hari Kumar, Thermodynamic modeling of the Fe–Mo system coupled with experiments and ab initio calculations, Journal of Alloys and Compounds 611, 303-312 (2014).
assessment that models this phase; reports values for this phase
doi:10.1016/0364-5916(82)90008-6 Armando Fernandez Guillermet, An assessment of the FeMo system, Calphad 6, 127-140 (1982).
assessment that models this phase
doi:10.1016/0364-5916(88)90025-9 Jan-Olof Andersson, A thermodynamic evaluation of the FeMoC system, Calphad 12, 9-23 (1988).
assessment that models this phase

MU_D85 (Fe–Mo)

Id: phase:fe-mo:d85-mu; status assigned
Structure: Fe7W6 · D8_5 · hR13 · R-3m (166); type st:d8-5-fe7w6-hr13; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in FeMo-14Raj.tdb also describes the disordered state
Caveat: partitioned order/disorder model in FeMo-20Tak.tdb also describes the disordered state
Caveat: partitioned order/disorder model in FeMo-88And-LB.tdb also describes the disordered state
Stability: stable in 4 of 4 calculated diagram(s): 300–1644.56 K, x(Mo) 0.37812–0.46154
Literature: 21 values (21 accepted) from 1 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:fe-mo:d85-mu, corpus:phase:fe-mo:mu-d85
paper: paper:10.1016/j.jallcom.2014.05.030:Fe7Mo6 (μ), paper:10.1016/j.jallcom.2014.05.030:μ
tdb: tdb:FeMo-14Raj.tdb:MU_D85, tdb:FeMo-20Tak.tdb:MU_D85, tdb:FeMo-82Fer.tdb:MU_D85, tdb:FeMo-88And-LB.tdb:MU_D85

TDB models of MU_D85 (4): PHASE and CONSTITUENT statements as written

FeMo-14Raj.tdb: MU_D85, type code %, sha256 1e573137abd4fa18…

49: PHASE MU_D85 % 4 1 4 2 6 !
50: CONST MU_D85 : FE% MO : MO : FE MO : FE% MO : !

FeMo-20Tak.tdb: MU_D85, type code %, sha256 fb163dec4400b1e5…

47: PHASE MU_D85 % 4 1 4 2 6 !
48: CONST MU_D85 : FE% MO : MO : FE MO% : FE : !

FeMo-82Fer.tdb: MU_D85, type code %, sha256 f5329b78d65288a2…

55: PHASE MU_D85 % 3 7 2 4 !
56: CONST MU_D85 : FE : MO : FE MO% : !

FeMo-88And-LB.tdb: MU_D85, type code %, sha256 bfba496e34ac804b…

85: PHASE MU_D85 % 4 1 4 2 6 !
86: CONST MU_D85 : FE : MO : FE MO% : FE% MO : !

Example references (5 of 5; assessments first):

doi:10.1016/j.jallcom.2014.05.030 V.B. Rajkumar, K.C. Hari Kumar, Thermodynamic modeling of the Fe–Mo system coupled with experiments and ab initio calculations, Journal of Alloys and Compounds 611, 303-312 (2014).
assessment that models this phase; reports values for this phase
doi:10.1016/0364-5916(82)90008-6 Armando Fernandez Guillermet, An assessment of the FeMo system, Calphad 6, 127-140 (1982).
assessment that models this phase
doi:10.1016/0364-5916(88)90025-9 Jan-Olof Andersson, A thermodynamic evaluation of the FeMoC system, Calphad 12, 9-23 (1988).
assessment that models this phase
doi:10.2355/tetsutohagane.TETSU-2019-097 K. Takahashi, K. Ishikawa, M. Fujioka, M. Enoki, H. Ohtani, Tetsu-to-Hagane, 106, 310-20(2020).
assessment that models this phase
doi:10.1016/0022-5088(74)90012-5 C.P. Heijwegen, G.D. Rieck, Determination of the phase diagram of the MoFe system using diffusion couples, Journal of the Less Common Metals 37, 115-121 (1974).
cited as the source of values for this phase

SIGMA_D8B (Fe–Mo)

Id: phase:fe-mo:d8b-sigma; status assigned
Structure: sigma-CrFe · D8_b · tP30 · P4_2/mnm (136); type st:d8-b-sigma-crfe-tp30; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in FeMo-14Raj.tdb also describes the disordered state
Caveat: partitioned order/disorder model in FeMo-88And-LB.tdb also describes the disordered state
Stability: stable in 3 of 3 calculated diagram(s): 1507.91–1884.54 K, x(Mo) 0.42912–0.56686
Literature: 22 values (22 accepted) from 1 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:fe-mo:d8b-sigma, corpus:phase:fe-mo:sigma-d8b
paper: paper:10.1016/j.jallcom.2014.05.030:FeMo (σ), paper:10.1016/j.jallcom.2014.05.030:σ
tdb: tdb:FeMo-14Raj.tdb:SIGMA_D8B, tdb:FeMo-82Fer.tdb:SIGMA_D8B, tdb:FeMo-88And-LB.tdb:SIGMA_D8B

TDB models of SIGMA_D8B (3): PHASE and CONSTITUENT statements as written

FeMo-14Raj.tdb: SIGMA_D8B, type code %, sha256 1e573137abd4fa18…

59: PHASE SIGMA_D8B % 2 1 2 !
60: CONST SIGMA_D8B : FE% MO : FE MO% : !

FeMo-82Fer.tdb: SIGMA_D8B, type code %, sha256 f5329b78d65288a2…

65: PHASE SIGMA_D8B % 3 10 4 16 !
66: CONST SIGMA_D8B : FE : MO : FE MO : !

FeMo-88And-LB.tdb: SIGMA_D8B, type code %, sha256 bfba496e34ac804b…

95: PHASE SIGMA_D8B % 3 10 4 16 !
96: CONST SIGMA_D8B : FE MO : MO : FE MO : !

Example references (4 of 4; assessments first):

doi:10.1016/j.jallcom.2014.05.030 V.B. Rajkumar, K.C. Hari Kumar, Thermodynamic modeling of the Fe–Mo system coupled with experiments and ab initio calculations, Journal of Alloys and Compounds 611, 303-312 (2014).
assessment that models this phase; reports values for this phase
doi:10.1016/0364-5916(82)90008-6 Armando Fernandez Guillermet, An assessment of the FeMo system, Calphad 6, 127-140 (1982).
assessment that models this phase
doi:10.1016/0364-5916(88)90025-9 Jan-Olof Andersson, A thermodynamic evaluation of the FeMoC system, Calphad 12, 9-23 (1988).
assessment that models this phase
doi:10.1016/0022-5088(74)90012-5 C.P. Heijwegen, G.D. Rieck, Determination of the phase diagram of the MoFe system using diffusion couples, Journal of the Less Common Metals 37, 115-121 (1974).
cited as the source of values for this phase

FCC_A1 (Fe–Mo)

Id: phase:fe-mo: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 4 of 4 calculated diagram(s): 833.32–1814.82 K, x(Mo) 0–0.02224
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:fe-mo:fcc-a1
tdb: tdb:FeMo-14Raj.tdb:FCC_A1, tdb:FeMo-20Tak.tdb:FCC_A1, tdb:FeMo-82Fer.tdb:FCC_A1, tdb:FeMo-88And-LB.tdb:FCC_A1

TDB models of FCC_A1 (4): PHASE and CONSTITUENT statements as written

FeMo-14Raj.tdb: FCC_A1, type code %A, sha256 1e573137abd4fa18…

29: PHASE FCC_A1 %A 2 1 1 !
30: CONST FCC_A1 : FE MO : VA : !

FeMo-20Tak.tdb: FCC_A1, type code %A, sha256 fb163dec4400b1e5…

27: PHASE FCC_A1 %A 2 1 1 !
28: CONST FCC_A1 : FE MO : VA : !

FeMo-82Fer.tdb: FCC_A1, type code %A, sha256 f5329b78d65288a2…

35: PHASE FCC_A1 %A 2 1 1 !
36: CONST FCC_A1 : FE MO : VA : !

FeMo-88And-LB.tdb: FCC_A1, type code %A, sha256 bfba496e34ac804b…

55: PHASE FCC_A1 %A 2 1 1 !
56: CONST FCC_A1 : FE MO : VA : !

Example references (4 of 4; assessments first):

doi:10.1016/0364-5916(82)90008-6 Armando Fernandez Guillermet, An assessment of the FeMo system, Calphad 6, 127-140 (1982).
assessment that models this phase
doi:10.1016/0364-5916(88)90025-9 Jan-Olof Andersson, A thermodynamic evaluation of the FeMoC system, Calphad 12, 9-23 (1988).
assessment that models this phase
doi:10.1016/j.jallcom.2014.05.030 V.B. Rajkumar, K.C. Hari Kumar, Thermodynamic modeling of the Fe–Mo system coupled with experiments and ab initio calculations, Journal of Alloys and Compounds 611, 303-312 (2014).
assessment that models this phase
doi:10.2355/tetsutohagane.TETSU-2019-097 K. Takahashi, K. Ishikawa, M. Fujioka, M. Enoki, H. Ohtani, Tetsu-to-Hagane, 106, 310-20(2020).
assessment that models this phase

FE2MO_C14 (Fe–Mo)

Id: phase:fe-mo:fe2mo-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 FeMo-88And-LB.tdb also describes the disordered state
Stability: stable in 2 of 2 calculated diagram(s): 300–1165.9 K, x(Mo) 0.16–0.42
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:fe-mo:fe2mo-c14
tdb: tdb:FeMo-20Tak.tdb:FE2MO_C14, tdb:FeMo-88And-LB.tdb:FE2MO_C14

TDB models of FE2MO_C14 (2): PHASE and CONSTITUENT statements as written

FeMo-20Tak.tdb: FE2MO_C14, type code %, sha256 fb163dec4400b1e5…

42: PHASE FE2MO_C14 % 3 2 4 6 !
43: CONST FE2MO_C14 : FE% VA : FE MO% : FE : !

FeMo-88And-LB.tdb: FE2MO_C14, type code %, sha256 bfba496e34ac804b…

70: PHASE FE2MO_C14 % 2 2 1 !
71: CONST FE2MO_C14 : FE% MO : FE MO% : !

Example references (2 of 2; assessments first):

doi:10.1016/0364-5916(88)90025-9 Jan-Olof Andersson, A thermodynamic evaluation of the FeMoC system, Calphad 12, 9-23 (1988).
assessment that models this phase
doi:10.2355/tetsutohagane.TETSU-2019-097 K. Takahashi, K. Ishikawa, M. Fujioka, M. Enoki, H. Ohtani, Tetsu-to-Hagane, 106, 310-20(2020).
assessment that models this phase

HCP_A3 (Fe–Mo)

Id: phase:fe-mo: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 4 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:fe-mo:hcp-a3
tdb: tdb:FeMo-14Raj.tdb:HCP_A3, tdb:FeMo-20Tak.tdb:HCP_A3, tdb:FeMo-82Fer.tdb:HCP_A3, tdb:FeMo-88And-LB.tdb:HCP_A3

TDB models of HCP_A3 (4): PHASE and CONSTITUENT statements as written

FeMo-14Raj.tdb: HCP_A3, type code %, sha256 1e573137abd4fa18…

39: PHASE HCP_A3 % 2 1 0.5 !
40: CONST HCP_A3 : FE MO : VA : !

FeMo-20Tak.tdb: HCP_A3, type code %, sha256 fb163dec4400b1e5…

37: PHASE HCP_A3 % 2 1 0.5 !
38: CONST HCP_A3 : FE MO : VA : !

FeMo-82Fer.tdb: HCP_A3, type code %, sha256 f5329b78d65288a2…

45: PHASE HCP_A3 % 2 1 0.5 !
46: CONST HCP_A3 : FE MO : VA : !

FeMo-88And-LB.tdb: HCP_A3, type code %, sha256 bfba496e34ac804b…

65: PHASE HCP_A3 % 2 1 0.5 !
66: CONST HCP_A3 : FE MO : VA : !

Example references (4 of 4; assessments first):

doi:10.1016/0364-5916(82)90008-6 Armando Fernandez Guillermet, An assessment of the FeMo system, Calphad 6, 127-140 (1982).
assessment that models this phase
doi:10.1016/0364-5916(88)90025-9 Jan-Olof Andersson, A thermodynamic evaluation of the FeMoC system, Calphad 12, 9-23 (1988).
assessment that models this phase
doi:10.1016/j.jallcom.2014.05.030 V.B. Rajkumar, K.C. Hari Kumar, Thermodynamic modeling of the Fe–Mo system coupled with experiments and ab initio calculations, Journal of Alloys and Compounds 611, 303-312 (2014).
assessment that models this phase
doi:10.2355/tetsutohagane.TETSU-2019-097 K. Takahashi, K. Ishikawa, M. Fujioka, M. Enoki, H. Ohtani, Tetsu-to-Hagane, 106, 310-20(2020).
assessment that models this phase

LIQUID (Fe–Mo)

Id: phase:fe-mo:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 4 of 4 calculated diagram(s): 1719.1–4000 K, x(Mo) 0–1
Literature: 18 values (18 accepted) from 2 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:fe-mo:liquid
paper: paper:10.1016/j.jallcom.2014.05.030:L, paper:10.1034/j.1600-0692.2002.311310106.x:liquid
tdb: tdb:FeMo-14Raj.tdb:LIQUID, tdb:FeMo-20Tak.tdb:LIQUID, tdb:FeMo-82Fer.tdb:LIQUID, tdb:FeMo-88And-LB.tdb:LIQUID

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

FeMo-14Raj.tdb: LIQUID, type code %, sha256 1e573137abd4fa18…

24: PHASE LIQUID:L % 1 1 !
25: CONST LIQUID:L : FE MO : !

FeMo-20Tak.tdb: LIQUID, type code %, sha256 fb163dec4400b1e5…

22: PHASE LIQUID:L % 1 1 !
23: CONST LIQUID:L : FE MO : !

FeMo-82Fer.tdb: LIQUID, type code %, sha256 f5329b78d65288a2…

30: PHASE LIQUID:L % 1 1 !
31: CONST LIQUID:L : FE MO : !

FeMo-88And-LB.tdb: LIQUID, type code %, sha256 bfba496e34ac804b…

50: PHASE LIQUID:L % 1 1 !
51: CONST LIQUID:L : FE MO : !

Example references (5 of 5; assessments first):

doi:10.1016/j.jallcom.2014.05.030 V.B. Rajkumar, K.C. Hari Kumar, Thermodynamic modeling of the Fe–Mo system coupled with experiments and ab initio calculations, Journal of Alloys and Compounds 611, 303-312 (2014).
assessment that models this phase; reports values for this phase
doi:10.1016/0364-5916(88)90025-9 Jan-Olof Andersson, A thermodynamic evaluation of the FeMoC system, Calphad 12, 9-23 (1988).
assessment that models this phase; cited as the source of values for this phase
doi:10.1016/0364-5916(82)90008-6 Armando Fernandez Guillermet, An assessment of the FeMo system, Calphad 6, 127-140 (1982).
assessment that models this phase
doi:10.2355/tetsutohagane.TETSU-2019-097 K. Takahashi, K. Ishikawa, M. Fujioka, M. Enoki, H. Ohtani, Tetsu-to-Hagane, 106, 310-20(2020).
assessment that models this phase
doi:10.1034/j.1600-0692.2002.311310106.x Matvei Zinkevich, Norbert Mattern, Hans‐Jürgen Seifert, Eberhard Gmelin, A thermodynamic assessment of the Fe‐Gd‐Mo system, Scand Jof Metallurgy 31, 34-51 (2002).
reports values for this phase

MU_OLD (Fe–Mo)

Id: phase:fe-mo:mu-old; status assigned
Structure: Fe7W6 · D8_5 · hR13 · R-3m (166); type st:d8-5-fe7w6-hr13; tier A: standard phase name; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 300–1641.49 K, x(Mo) 0.38701–0.46154
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:fe-mo:mu-old
tdb: tdb:FeMo-88And-LB.tdb:MU_OLD

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

FeMo-88And-LB.tdb: MU_OLD, type code %, sha256 bfba496e34ac804b…

80: PHASE MU_OLD % 3 7 2 4 !
81: CONST MU_OLD : FE : MO : FE MO% : !

Example references (1 of 1; assessments first):

doi:10.1016/0364-5916(88)90025-9 Jan-Olof Andersson, A thermodynamic evaluation of the FeMoC system, Calphad 12, 9-23 (1988).
assessment that models this phase

SIGMA_OLD (Fe–Mo)

Id: phase:fe-mo:old-sigma; status assigned
Structure: sigma-CrFe · D8_b · tP30 · P4_2/mnm (136); type st:d8-b-sigma-crfe-tp30; tier A: standard phase name; confidence high
Stability: stable in 2 of 2 calculated diagram(s): 1535.54–1884.66 K, x(Mo) 0.42926–0.56609
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:fe-mo:old-sigma
tdb: tdb:FeMo-20Tak.tdb:SIGMA_OLD, tdb:FeMo-88And-LB.tdb:SIGMA_OLD

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

FeMo-20Tak.tdb: SIGMA_OLD, type code %, sha256 fb163dec4400b1e5…

57: PHASE SIGMA_OLD % 3 8 4 18 !
58: CONST SIGMA_OLD : FE : MO : FE MO : !

FeMo-88And-LB.tdb: SIGMA_OLD, type code %, sha256 bfba496e34ac804b…

100: PHASE SIGMA_OLD % 3 8 4 18 !
101: CONST SIGMA_OLD : FE : MO : FE MO : !

Example references (2 of 2; assessments first):

doi:10.1016/0364-5916(88)90025-9 Jan-Olof Andersson, A thermodynamic evaluation of the FeMoC system, Calphad 12, 9-23 (1988).
assessment that models this phase
doi:10.2355/tetsutohagane.TETSU-2019-097 K. Takahashi, K. Ishikawa, M. Fujioka, M. Enoki, H. Ohtani, Tetsu-to-Hagane, 106, 310-20(2020).
assessment that models this phase

R_PHASE (Fe–Mo)

Id: phase:fe-mo:phase-r; status assigned
Structure: R-(Co,Cr,Mo) · hR53 · R-3 (148); type st:r-co-cr-mo-hr53; 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 (name_has_descriptive_tokens:R, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stability: stable in 4 of 4 calculated diagram(s): 1466.05–1771.51 K, x(Mo) 0.33039–0.38897
Literature: 18 values (18 accepted) from 1 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:fe-mo:phase-r, corpus:phase:fe-mo:r-phase
paper: paper:10.1016/j.jallcom.2014.05.030:Fe3Mo2 (R), paper:10.1016/j.jallcom.2014.05.030:R
tdb: tdb:FeMo-14Raj.tdb:R_PHASE, tdb:FeMo-20Tak.tdb:R_PHASE, tdb:FeMo-82Fer.tdb:R_PHASE, tdb:FeMo-88And-LB.tdb:R_PHASE

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

FeMo-14Raj.tdb: R_PHASE, type code %, sha256 1e573137abd4fa18…

54: PHASE R_PHASE % 3 32 18 3 !
55: CONST R_PHASE : FE : MO : FE MO : !

FeMo-20Tak.tdb: R_PHASE, type code %, sha256 fb163dec4400b1e5…

52: PHASE R_PHASE % 3 27 14 12 !
53: CONST R_PHASE : FE : MO : FE MO : !

FeMo-82Fer.tdb: R_PHASE, type code %, sha256 f5329b78d65288a2…

60: PHASE R_PHASE % 3 27 14 12 !
61: CONST R_PHASE : FE : MO : FE MO : !

FeMo-88And-LB.tdb: R_PHASE, type code %, sha256 bfba496e34ac804b…

90: PHASE R_PHASE % 3 27 14 12 !
91: CONST R_PHASE : FE : MO : FE MO : !

Example references (5 of 5; assessments first):

doi:10.1016/j.jallcom.2014.05.030 V.B. Rajkumar, K.C. Hari Kumar, Thermodynamic modeling of the Fe–Mo system coupled with experiments and ab initio calculations, Journal of Alloys and Compounds 611, 303-312 (2014).
assessment that models this phase; reports values for this phase
doi:10.1016/0364-5916(82)90008-6 Armando Fernandez Guillermet, An assessment of the FeMo system, Calphad 6, 127-140 (1982).
assessment that models this phase
doi:10.1016/0364-5916(88)90025-9 Jan-Olof Andersson, A thermodynamic evaluation of the FeMoC system, Calphad 12, 9-23 (1988).
assessment that models this phase
doi:10.2355/tetsutohagane.TETSU-2019-097 K. Takahashi, K. Ishikawa, M. Fujioka, M. Enoki, H. Ohtani, Tetsu-to-Hagane, 106, 310-20(2020).
assessment that models this phase
doi:10.1016/0022-5088(74)90012-5 C.P. Heijwegen, G.D. Rieck, Determination of the phase diagram of the MoFe system using diffusion couples, Journal of the Less Common Metals 37, 115-121 (1974).
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}
}