Fe–U phases

8 phases (tier A 6, liquid 1, needs_review 1); 7 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–U system page · Markdown · field reference

Phases of the Fe–U system (8)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
ORTHORHOMBIC_A20 phase:fe-u:a20-orthorhombic	alpha-U · A20 · oC4 · Cmcm (63)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 300–1047.02 K, x(U) 1–1	0	4
BCC_A2 phase:fe-u:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 300–2062.99 K, x(U) 0–1	6	4
FCC_A1 phase:fe-u:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 529.81–1812.47 K, x(U) 0–0.00719	8	4
FE2U_C15 phase:fe-u:fe2u-c15	Cu2Mg · C15 · cF24 · Fd-3m (227)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 300–1560.9 K, x(U) 0.33333–0.33333	18	4
FEU6_D2C phase:fe-u:feu6-d2c	MnU6 · D2_c · tI28 · I4/mcm (140)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 300–4000 K, x(U) 0.85714–0.85714	15	4
HCP_A3 phase:fe-u: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-u:liquid	liquid	liquid	stable in 4 of 4 calculated diagram(s): 875.01–4000 K, x(U) 0–1	18	4
TETRAGONAL_U phase:fe-u:u-tetragonal		needs_review	stable in 4 of 4 calculated diagram(s): 938.79–1407.62 K, x(U) 0.99878–1	11	4

ORTHORHOMBIC_A20 (Fe–U)

Id: phase:fe-u:a20-orthorhombic; status assigned
Structure: alpha-U · A20 · oC4 · Cmcm (63); type st:a20-alpha-u-oc4; tier A: standard phase name; confidence high
Stoichiometry: U 1.0000
Stability: stable in 4 of 4 calculated diagram(s): 300–1047.02 K, x(U) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:fe-u:a20-orthorhombic
tdb: tdb:FeU-03Cha.tdb:ORTHORHOMBIC_A20, tdb:FeU-10Kur.tdb:ORTHORHOMBIC_A20, tdb:FeU-23Jia.tdb:ORTHORHOMBIC_A20, tdb:FeU-98Kur.tdb:ORTHORHOMBIC_A20

TDB models of ORTHORHOMBIC_A20 (4): PHASE and CONSTITUENT statements as written

FeU-03Cha.tdb: ORTHORHOMBIC_A20, type code %, sha256 2b3cb4ca0291ed3c…

49: PHASE ORTHORHOMBIC_A20 % 1 1 !
50: CONST ORTHORHOMBIC_A20 : U : !

FeU-10Kur.tdb: ORTHORHOMBIC_A20, type code %, sha256 bc15fcbedb33d3b6…

48: PHASE ORTHORHOMBIC_A20 % 1 1 !
49: CONST ORTHORHOMBIC_A20 : U : !

FeU-23Jia.tdb: ORTHORHOMBIC_A20, type code %, sha256 eb9a00d844e17ebb…

42: PHASE ORTHORHOMBIC_A20 % 1 1 !
43: CONST ORTHORHOMBIC_A20 : U : !

FeU-98Kur.tdb: ORTHORHOMBIC_A20, type code %, sha256 d4682ee275bf4ce8…

49: PHASE ORTHORHOMBIC_A20 % 1 1 !
50: CONST ORTHORHOMBIC_A20 : U : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jnucmat.2022.154180 Yueshan Jiang, Yanlin He, Weisen Zheng, Jianlei Zhang, Dekui Zhang, Xiaogang Lu, Thermodynamic analysis for molten corium stratification with U-Zr-O-Fe database, Journal of Nuclear Materials 574, 154180 (2023).
assessment that models this phase
doi:10.1016/S0925-8388(98)00176-5 M. Kurata, T. Ogata, K. Nakamura, T. Ogawa, J. Alloys Compd., 271-273, 636-40(1998).
assessment that models this phase
doi:10.1361/105497103770330730 S. Chatain, C. Guéneau, D. Labroche, O. Dugne, J. Rogez, Thermodynamic assessment of the Fe-U binary system, JPE 24, 122-131 (2003).
assessment that models this phase

BCC_A2 (Fe–U)

Id: phase:fe-u: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): 300–2062.99 K, x(U) 0–1
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:fe-u:bcc-a2
paper: paper:10.1361/105497103770330730:bcc - Fe
tdb: tdb:FeU-03Cha.tdb:BCC_A2, tdb:FeU-10Kur.tdb:BCC_A2, tdb:FeU-23Jia.tdb:BCC_A2, tdb:FeU-98Kur.tdb:BCC_A2

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

FeU-03Cha.tdb: BCC_A2, type code %B, sha256 2b3cb4ca0291ed3c…

39: PHASE BCC_A2 %B 2 1 3 !
40: CONST BCC_A2 : FE% U% : VA : !

FeU-10Kur.tdb: BCC_A2, type code %B, sha256 bc15fcbedb33d3b6…

38: PHASE BCC_A2 %B 2 1 3 !
39: CONST BCC_A2 : FE% U% : VA : !

FeU-23Jia.tdb: BCC_A2, type code %B, sha256 eb9a00d844e17ebb…

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

FeU-98Kur.tdb: BCC_A2, type code %B, sha256 d4682ee275bf4ce8…

39: PHASE BCC_A2 %B 2 1 3 !
40: CONST BCC_A2 : FE% U% : VA : !

Example references (6 of 6; assessments first):

doi:10.1361/105497103770330730 S. Chatain, C. Guéneau, D. Labroche, O. Dugne, J. Rogez, Thermodynamic assessment of the Fe-U binary system, JPE 24, 122-131 (2003).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jnucmat.2022.154180 Yueshan Jiang, Yanlin He, Weisen Zheng, Jianlei Zhang, Dekui Zhang, Xiaogang Lu, Thermodynamic analysis for molten corium stratification with U-Zr-O-Fe database, Journal of Nuclear Materials 574, 154180 (2023).
assessment that models this phase
doi:10.1016/S0925-8388(98)00176-5 M. Kurata, T. Ogata, K. Nakamura, T. Ogawa, J. Alloys Compd., 271-273, 636-40(1998).
assessment that models this phase
doi:10.1179/cmq.1966.5.4.355 G.G. Michaud, A Study of the Iron-Rich Portion of the Fe-U Phase Diagram, Canadian Metallurgical Quarterly 5, 355-365 (1966).
cited as the source of values for this phase
doi:10.1016/0022-3115(84)90046-1 L.R. Chapman, C.E. Holcombe, Revision of the uranium-iron phase diagram, Journal of Nuclear Materials 126, 323-326 (1984).
cited as the source of values for this phase
doi:10.1016/0022-3115(91)90531-b L. Leibowitz, R.A. Blomquist, Thermodynamics and phase equilibria of the iron—uranium system, Journal of Nuclear Materials 184, 47-52 (1991).
cited as the source of values for this phase

FCC_A1 (Fe–U)

Id: phase:fe-u: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): 529.81–1812.47 K, x(U) 0–0.00719
Literature: 8 values (8 accepted) from 1 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:fe-u:fcc-a1
paper: paper:10.1361/105497103770330730:fcc - Fe
tdb: tdb:FeU-03Cha.tdb:FCC_A1, tdb:FeU-10Kur.tdb:FCC_A1, tdb:FeU-23Jia.tdb:FCC_A1, tdb:FeU-98Kur.tdb:FCC_A1

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

FeU-03Cha.tdb: FCC_A1, type code %A, sha256 2b3cb4ca0291ed3c…

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

FeU-10Kur.tdb: FCC_A1, type code %A, sha256 bc15fcbedb33d3b6…

33: PHASE FCC_A1 %A 2 1 1 !
34: CONST FCC_A1 : FE% U : VA : !

FeU-23Jia.tdb: FCC_A1, type code %A, sha256 eb9a00d844e17ebb…

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

FeU-98Kur.tdb: FCC_A1, type code %A, sha256 d4682ee275bf4ce8…

34: PHASE FCC_A1 %A 2 1 1 !
35: CONST FCC_A1 : FE% U : VA : !

Example references (6 of 6; assessments first):

doi:10.1361/105497103770330730 S. Chatain, C. Guéneau, D. Labroche, O. Dugne, J. Rogez, Thermodynamic assessment of the Fe-U binary system, JPE 24, 122-131 (2003).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jnucmat.2022.154180 Yueshan Jiang, Yanlin He, Weisen Zheng, Jianlei Zhang, Dekui Zhang, Xiaogang Lu, Thermodynamic analysis for molten corium stratification with U-Zr-O-Fe database, Journal of Nuclear Materials 574, 154180 (2023).
assessment that models this phase
doi:10.1016/S0925-8388(98)00176-5 M. Kurata, T. Ogata, K. Nakamura, T. Ogawa, J. Alloys Compd., 271-273, 636-40(1998).
assessment that models this phase
doi:10.1016/0022-3115(84)90046-1 L.R. Chapman, C.E. Holcombe, Revision of the uranium-iron phase diagram, Journal of Nuclear Materials 126, 323-326 (1984).
cited as the source of values for this phase
doi:10.1179/cmq.1966.5.4.355 G.G. Michaud, A Study of the Iron-Rich Portion of the Fe-U Phase Diagram, Canadian Metallurgical Quarterly 5, 355-365 (1966).
cited as the source of values for this phase
doi:10.1016/0022-3115(91)90531-b L. Leibowitz, R.A. Blomquist, Thermodynamics and phase equilibria of the iron—uranium system, Journal of Nuclear Materials 184, 47-52 (1991).
cited as the source of values for this phase

FE2U_C15 (Fe–U)

Id: phase:fe-u:fe2u-c15; status assigned
Structure: Cu2Mg · C15 · cF24 · Fd-3m (227); type st:c15-cu2mg-cf24; tier A: standard phase name; confidence high
Stoichiometry: Fe 0.6667, U 0.3333
Stability: stable in 4 of 4 calculated diagram(s): 300–1560.9 K, x(U) 0.33333–0.33333
Literature: 18 values (18 accepted) from 1 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:fe-u:fe2u-c15
paper: paper:10.1361/105497103770330730:Fe2U
tdb: tdb:FeU-03Cha.tdb:FE2U_C15, tdb:FeU-10Kur.tdb:FE2U_C15, tdb:FeU-23Jia.tdb:FE2U_C15, tdb:FeU-98Kur.tdb:FE2U_C15

TDB models of FE2U_C15 (4): PHASE and CONSTITUENT statements as written

FeU-03Cha.tdb: FE2U_C15, type code %, sha256 2b3cb4ca0291ed3c…

59: PHASE FE2U_C15 % 2 2 1 !
60: CONST FE2U_C15 : FE : U : !

FeU-10Kur.tdb: FE2U_C15, type code %, sha256 bc15fcbedb33d3b6…

58: PHASE FE2U_C15 % 2 2 1 !
59: CONST FE2U_C15 : FE : U : !

FeU-23Jia.tdb: FE2U_C15, type code %, sha256 eb9a00d844e17ebb…

52: PHASE FE2U_C15 % 2 2 1 !
53: CONST FE2U_C15 : FE : U : !

FeU-98Kur.tdb: FE2U_C15, type code %, sha256 d4682ee275bf4ce8…

59: PHASE FE2U_C15 % 2 2 1 !
60: CONST FE2U_C15 : FE : U : !

Example references (7 of 7; assessments first):

doi:10.1361/105497103770330730 S. Chatain, C. Guéneau, D. Labroche, O. Dugne, J. Rogez, Thermodynamic assessment of the Fe-U binary system, JPE 24, 122-131 (2003).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jnucmat.2022.154180 Yueshan Jiang, Yanlin He, Weisen Zheng, Jianlei Zhang, Dekui Zhang, Xiaogang Lu, Thermodynamic analysis for molten corium stratification with U-Zr-O-Fe database, Journal of Nuclear Materials 574, 154180 (2023).
assessment that models this phase
doi:10.1016/S0925-8388(98)00176-5 M. Kurata, T. Ogata, K. Nakamura, T. Ogawa, J. Alloys Compd., 271-273, 636-40(1998).
assessment that models this phase
doi:10.1016/0022-3115(84)90046-1 L.R. Chapman, C.E. Holcombe, Revision of the uranium-iron phase diagram, Journal of Nuclear Materials 126, 323-326 (1984).
cited as the source of values for this phase
doi:10.1016/0022-3115(91)90531-b L. Leibowitz, R.A. Blomquist, Thermodynamics and phase equilibria of the iron—uranium system, Journal of Nuclear Materials 184, 47-52 (1991).
cited as the source of values for this phase
doi:10.1179/cmq.1966.5.4.355 G.G. Michaud, A Study of the Iron-Rich Portion of the Fe-U Phase Diagram, Canadian Metallurgical Quarterly 5, 355-365 (1966).
cited as the source of values for this phase
doi:10.1016/0022-3115(95)00164-6 M.P. Antony, R. Babu, C.K. Mathews, U.V. Varada Raju, Erratum to “enthalpies of formation of UNi5 UNI2 and UFe2 by solution calorimetry” [Journal of Nuclear Materials 223 (1995) 213], Journal of Nuclear Materials 228, 154 (1996).
cited as the source of values for this phase

FEU6_D2C (Fe–U)

Id: phase:fe-u:feu6-d2c; status assigned
Structure: MnU6 · D2_c · tI28 · I4/mcm (140); type st:d2-c-mnu6-ti28; tier A: standard phase name; confidence high
Stoichiometry: Fe 0.1429, U 0.8571
Stability: stable in 4 of 4 calculated diagram(s): 300–4000 K, x(U) 0.85714–0.85714
Literature: 15 values (15 accepted) from 1 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:fe-u:feu6-d2c
paper: paper:10.1361/105497103770330730:FeU6
tdb: tdb:FeU-03Cha.tdb:FEU6_D2C, tdb:FeU-10Kur.tdb:FEU6_D2C, tdb:FeU-23Jia.tdb:FEU6_D2C, tdb:FeU-98Kur.tdb:FEU6_D2C

TDB models of FEU6_D2C (4): PHASE and CONSTITUENT statements as written

FeU-03Cha.tdb: FEU6_D2C, type code %, sha256 2b3cb4ca0291ed3c…

64: PHASE FEU6_D2C % 2 1 6 !
65: CONST FEU6_D2C : FE : U : !

FeU-10Kur.tdb: FEU6_D2C, type code %, sha256 bc15fcbedb33d3b6…

63: PHASE FEU6_D2C % 2 1 6 !
64: CONST FEU6_D2C : FE : U : !

FeU-23Jia.tdb: FEU6_D2C, type code %, sha256 eb9a00d844e17ebb…

57: PHASE FEU6_D2C % 2 1 6 !
58: CONST FEU6_D2C : FE : U : !

FeU-98Kur.tdb: FEU6_D2C, type code %, sha256 d4682ee275bf4ce8…

64: PHASE FEU6_D2C % 2 1 6 !
65: CONST FEU6_D2C : FE : U : !

Example references (5 of 5; assessments first):

doi:10.1361/105497103770330730 S. Chatain, C. Guéneau, D. Labroche, O. Dugne, J. Rogez, Thermodynamic assessment of the Fe-U binary system, JPE 24, 122-131 (2003).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jnucmat.2022.154180 Yueshan Jiang, Yanlin He, Weisen Zheng, Jianlei Zhang, Dekui Zhang, Xiaogang Lu, Thermodynamic analysis for molten corium stratification with U-Zr-O-Fe database, Journal of Nuclear Materials 574, 154180 (2023).
assessment that models this phase
doi:10.1016/S0925-8388(98)00176-5 M. Kurata, T. Ogata, K. Nakamura, T. Ogawa, J. Alloys Compd., 271-273, 636-40(1998).
assessment that models this phase
doi:10.1016/0022-3115(84)90046-1 L.R. Chapman, C.E. Holcombe, Revision of the uranium-iron phase diagram, Journal of Nuclear Materials 126, 323-326 (1984).
cited as the source of values for this phase
doi:10.1016/0022-3115(91)90531-b L. Leibowitz, R.A. Blomquist, Thermodynamics and phase equilibria of the iron—uranium system, Journal of Nuclear Materials 184, 47-52 (1991).
cited as the source of values for this phase

HCP_A3 (Fe–U)

Id: phase:fe-u: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-u:hcp-a3
tdb: tdb:FeU-03Cha.tdb:HCP_A3, tdb:FeU-10Kur.tdb:HCP_A3, tdb:FeU-23Jia.tdb:HCP_A3, tdb:FeU-98Kur.tdb:HCP_A3

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

FeU-03Cha.tdb: HCP_A3, type code %A, sha256 2b3cb4ca0291ed3c…

44: PHASE HCP_A3 %A 2 1 0.5 !
45: CONST HCP_A3 : FE : VA : !

FeU-10Kur.tdb: HCP_A3, type code %A, sha256 bc15fcbedb33d3b6…

43: PHASE HCP_A3 %A 2 1 0.5 !
44: CONST HCP_A3 : FE U : VA : !

FeU-23Jia.tdb: HCP_A3, type code %A, sha256 eb9a00d844e17ebb…

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

FeU-98Kur.tdb: HCP_A3, type code %A, sha256 d4682ee275bf4ce8…

44: PHASE HCP_A3 %A 2 1 0.5 !
45: CONST HCP_A3 : FE U : VA : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jnucmat.2022.154180 Yueshan Jiang, Yanlin He, Weisen Zheng, Jianlei Zhang, Dekui Zhang, Xiaogang Lu, Thermodynamic analysis for molten corium stratification with U-Zr-O-Fe database, Journal of Nuclear Materials 574, 154180 (2023).
assessment that models this phase
doi:10.1016/S0925-8388(98)00176-5 M. Kurata, T. Ogata, K. Nakamura, T. Ogawa, J. Alloys Compd., 271-273, 636-40(1998).
assessment that models this phase
doi:10.1361/105497103770330730 S. Chatain, C. Guéneau, D. Labroche, O. Dugne, J. Rogez, Thermodynamic assessment of the Fe-U binary system, JPE 24, 122-131 (2003).
assessment that models this phase

LIQUID (Fe–U)

Id: phase:fe-u:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 4 of 4 calculated diagram(s): 875.01–4000 K, x(U) 0–1
Literature: 18 values (18 accepted) from 1 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:fe-u:liquid
paper: paper:10.1361/105497103770330730:L, paper:10.1361/105497103770330730:liquid
tdb: tdb:FeU-03Cha.tdb:LIQUID, tdb:FeU-10Kur.tdb:LIQUID, tdb:FeU-23Jia.tdb:LIQUID, tdb:FeU-98Kur.tdb:LIQUID

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

FeU-03Cha.tdb: LIQUID, type code %, sha256 2b3cb4ca0291ed3c…

29: PHASE LIQUID:L % 1 1 !
30: CONST LIQUID:L : FE U : !

FeU-10Kur.tdb: LIQUID, type code %, sha256 bc15fcbedb33d3b6…

28: PHASE LIQUID:L % 1 1 !
29: CONST LIQUID:L : FE U : !

FeU-23Jia.tdb: LIQUID, type code %, sha256 eb9a00d844e17ebb…

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

FeU-98Kur.tdb: LIQUID, type code %, sha256 d4682ee275bf4ce8…

29: PHASE LIQUID:L % 1 1 !
30: CONST LIQUID:L : FE U : !

Example references (6 of 6; assessments first):

doi:10.1361/105497103770330730 S. Chatain, C. Guéneau, D. Labroche, O. Dugne, J. Rogez, Thermodynamic assessment of the Fe-U binary system, JPE 24, 122-131 (2003).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jnucmat.2022.154180 Yueshan Jiang, Yanlin He, Weisen Zheng, Jianlei Zhang, Dekui Zhang, Xiaogang Lu, Thermodynamic analysis for molten corium stratification with U-Zr-O-Fe database, Journal of Nuclear Materials 574, 154180 (2023).
assessment that models this phase
doi:10.1016/S0925-8388(98)00176-5 M. Kurata, T. Ogata, K. Nakamura, T. Ogawa, J. Alloys Compd., 271-273, 636-40(1998).
assessment that models this phase
doi:10.1016/0022-3115(84)90046-1 L.R. Chapman, C.E. Holcombe, Revision of the uranium-iron phase diagram, Journal of Nuclear Materials 126, 323-326 (1984).
cited as the source of values for this phase
doi:10.1179/cmq.1966.5.4.355 G.G. Michaud, A Study of the Iron-Rich Portion of the Fe-U Phase Diagram, Canadian Metallurgical Quarterly 5, 355-365 (1966).
cited as the source of values for this phase
doi:10.1016/0022-3115(91)90531-b L. Leibowitz, R.A. Blomquist, Thermodynamics and phase equilibria of the iron—uranium system, Journal of Nuclear Materials 184, 47-52 (1991).
cited as the source of values for this phase

TETRAGONAL_U (Fe–U)

Id: phase:fe-u:u-tetragonal; status needs_review
No structure assigned. Why: name_has_descriptive_tokens:TETRAGONAL; no_structure_token
Candidate (sgte_mmc2): beta-U · A_b · tP30 · P4_2/mnm (136) — Hallstedt 2025 mmc2 row for TETRAGONAL_U: beta-U
Candidate (tdb_comment): beta-U · tP30 · P4_2/mnm, SB: A_b — FeU-03Cha.tdb: 'Prototype beta-U (tP30, P4_2/mnm, SB: A_b)'
Candidate (tdb_comment): beta-U · tP30 · P4_2/mnm, SB: A_b — FeU-10Kur.tdb: 'Prototype beta-U (tP30, P4_2/mnm, SB: A_b)'
Candidate (tdb_comment): beta-U · tP30 · P4_2/mnm, SB: A_b — FeU-23Jia.tdb: 'Prototype beta-U (tP30, P4_2/mnm, SB: A_b)'
Candidate (tdb_comment): beta-U · tP30 · P4_2/mnm, SB: A_b — FeU-98Kur.tdb: 'Prototype beta-U (tP30, P4_2/mnm, SB: A_b)'
Stability: stable in 4 of 4 calculated diagram(s): 938.79–1407.62 K, x(U) 0.99878–1
Literature: 11 values (11 accepted) from 1 papers
Interactive: phase registry entry

Names (10): corpus: corpus:phase:fe-u:u-tetragonal, corpus:phase:fe-u:tetragonal-u
paper: paper:10.1361/105497103770330730:bcc - U, paper:10.1361/105497103770330730:bcc-U, paper:10.1361/105497103770330730:tetragonal - U, paper:10.1361/105497103770330730:tetragonal-U
tdb: tdb:FeU-03Cha.tdb:TETRAGONAL_U, tdb:FeU-10Kur.tdb:TETRAGONAL_U, tdb:FeU-23Jia.tdb:TETRAGONAL_U, tdb:FeU-98Kur.tdb:TETRAGONAL_U

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

FeU-03Cha.tdb: TETRAGONAL_U, type code %, sha256 2b3cb4ca0291ed3c…

54: PHASE TETRAGONAL_U % 1 1 !
55: CONST TETRAGONAL_U : FE U% : !

FeU-10Kur.tdb: TETRAGONAL_U, type code %, sha256 bc15fcbedb33d3b6…

53: PHASE TETRAGONAL_U % 1 1 !
54: CONST TETRAGONAL_U : U : !

FeU-23Jia.tdb: TETRAGONAL_U, type code %, sha256 eb9a00d844e17ebb…

47: PHASE TETRAGONAL_U % 1 1 !
48: CONST TETRAGONAL_U : U : !

FeU-98Kur.tdb: TETRAGONAL_U, type code %, sha256 d4682ee275bf4ce8…

54: PHASE TETRAGONAL_U % 1 1 !
55: CONST TETRAGONAL_U : U : !

Example references (4 of 4; assessments first):

doi:10.1361/105497103770330730 S. Chatain, C. Guéneau, D. Labroche, O. Dugne, J. Rogez, Thermodynamic assessment of the Fe-U binary system, JPE 24, 122-131 (2003).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jnucmat.2022.154180 Yueshan Jiang, Yanlin He, Weisen Zheng, Jianlei Zhang, Dekui Zhang, Xiaogang Lu, Thermodynamic analysis for molten corium stratification with U-Zr-O-Fe database, Journal of Nuclear Materials 574, 154180 (2023).
assessment that models this phase
doi:10.1016/S0925-8388(98)00176-5 M. Kurata, T. Ogata, K. Nakamura, T. Ogawa, J. Alloys Compd., 271-273, 636-40(1998).
assessment that models this phase
doi:10.1016/0022-3115(84)90046-1 L.R. Chapman, C.E. Holcombe, Revision of the uranium-iron phase diagram, Journal of Nuclear Materials 126, 323-326 (1984).
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}
}