Te–Tl phases

10 phases (tier A 4, tier B 1, tier C 3, liquid 2); 9 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 · Te–Tl system page · Markdown · field reference

Phases of the Te–Tl system (10)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
HEXAGONAL_A8 phase:te-tl:a8-hexagonal	gamma-Se · A8 · hP3 · P3_121 (152)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–722.66 K, x(Te) 1–1	7	2
BCC_A2 phase:te-tl:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 507–2499.5 K, x(Te) 0–0	3	2
FCC_A1 phase:te-tl:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	not stable in 2 calculated diagram(s)	0	2
HCP_A3 phase:te-tl:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–507 K, x(Te) 0–0	0	2
ION phase:te-tl:ion	liquid	liquid	stable in 1 of 1 calculated diagram(s): 504.09–2500 K, x(Te) 0–1	0	1
LIQUID phase:te-tl:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 497.28–2500 K, x(Te) 0–1	11	1
TL2TE phase:te-tl:tl2te	Tl2Te · mC132 · C2/c (15)	tier B: DFT-supported (unique MP + OQMD match)	stable in 1 of 1 calculated diagram(s): 300–691.29 K, x(Te) 0.33333–0.33333	3	1
TL2TE3 phase:te-tl:tl2te3	Tl2Te3 · mC20 · C2/c (15)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 2 of 2 calculated diagram(s): 300–507.89 K, x(Te) 0.6–0.6	14	2
TL5TE3 phase:te-tl:tl5te3	Bi3In5 · tI32 · I4/mcm (140)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 2 of 2 calculated diagram(s): 300–727.78 K, x(Te) 0.33333–0.375	15	2
TLTE phase:te-tl:tlte	TlTe · tI32 · I4/mcm (140)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 2 of 2 calculated diagram(s): 300–573.85 K, x(Te) 0.5–0.5	14	2

HEXAGONAL_A8 (Te–Tl)

Id: phase:te-tl:a8-hexagonal; status assigned
Structure: gamma-Se · A8 · hP3 · P3_121 (152); type st:a8-gamma-se-hp3; tier A: standard phase name; confidence high
Stoichiometry: Te 1.0000
Stability: stable in 2 of 2 calculated diagram(s): 300–722.66 K, x(Te) 1–1
Literature: 7 values (7 accepted) from 2 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:te-tl:a8-hexagonal, corpus:phase:te-tl:hexagonal-a8
paper: paper:10.1007/bf02667808:Te, paper:10.1007/s11664-010-1248-7:Hexagonal_A8
tdb: tdb:TlTe-10Gie.tdb:HEXAGONAL_A8, tdb:TlTe-93Oh.tdb:HEXAGONAL_A8

TDB models of HEXAGONAL_A8 (2): PHASE and CONSTITUENT statements as written

TlTe-10Gie.tdb: HEXAGONAL_A8, type code %, sha256 57b4b9547de53b52…

49: PHASE HEXAGONAL_A8 % 1 1 !
50: CONST HEXAGONAL_A8 : TE : !

TlTe-93Oh.tdb: HEXAGONAL_A8, type code %, sha256 395f5718ea4ec440…

51: PHASE HEXAGONAL_A8 % 1 1 !
52: CONST HEXAGONAL_A8 : TE : !

Example references (3 of 3; assessments first):

doi:10.1007/BF02667808 C.-S. Oh, D.N. Lee, J. Phase Equilib., 14, 197-204(1993).
assessment that models this phase; reports values for this phase
doi:10.1007/s11664-010-1248-7 Wojciech Gierlotka, Thermodynamic Description of the Te-Tl Binary System Using the Associate Solution Model, Journal of Elec Materi 39, 1319-1325 (2010).
assessment that models this phase; reports values for this phase
doi:10.1361/105497100770339833 H. Okamoto, Te-Tl (Tellurium-Thallium), JPE 21, 501-501 (2000).
cited as the source of values for this phase

BCC_A2 (Te–Tl)

Id: phase:te-tl:bcc-a2; status assigned
Structure: W · A2 · cI2 · Im-3m (229); type st:a2-w-ci2; tier A: standard phase name; confidence high
Stoichiometry: Tl 1.0000
Stability: stable in 2 of 2 calculated diagram(s): 507–2499.5 K, x(Te) 0–0
Literature: 3 values (3 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:te-tl:bcc-a2
paper: paper:10.1007/bf02667808:βTl
tdb: tdb:TlTe-10Gie.tdb:BCC_A2, tdb:TlTe-93Oh.tdb:BCC_A2

TDB models of BCC_A2 (2): PHASE and CONSTITUENT statements as written

TlTe-10Gie.tdb: BCC_A2, type code %B, sha256 57b4b9547de53b52…

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

TlTe-93Oh.tdb: BCC_A2, type code %B, sha256 395f5718ea4ec440…

41: PHASE BCC_A2 %B 2 1 3 !
42: CONST BCC_A2 : TL : VA : !

Example references (2 of 2; assessments first):

doi:10.1007/BF02667808 C.-S. Oh, D.N. Lee, J. Phase Equilib., 14, 197-204(1993).
assessment that models this phase; reports values for this phase
doi:10.1007/s11664-010-1248-7 Wojciech Gierlotka, Thermodynamic Description of the Te-Tl Binary System Using the Associate Solution Model, Journal of Elec Materi 39, 1319-1325 (2010).
assessment that models this phase

FCC_A1 (Te–Tl)

Id: phase:te-tl:fcc-a1; status assigned
Structure: Cu · A1 · cF4 · Fm-3m (225); type st:a1-cu-cf4; tier A: standard phase name; confidence high
Stoichiometry: Tl 1.0000
Stability: not stable in 2 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:te-tl:fcc-a1
tdb: tdb:TlTe-10Gie.tdb:FCC_A1, tdb:TlTe-93Oh.tdb:FCC_A1

TDB models of FCC_A1 (2): PHASE and CONSTITUENT statements as written

TlTe-10Gie.tdb: FCC_A1, type code %A, sha256 57b4b9547de53b52…

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

TlTe-93Oh.tdb: FCC_A1, type code %A, sha256 395f5718ea4ec440…

36: PHASE FCC_A1 %A 2 1 1 !
37: CONST FCC_A1 : TL : VA : !

Example references (2 of 2; assessments first):

doi:10.1007/BF02667808 C.-S. Oh, D.N. Lee, J. Phase Equilib., 14, 197-204(1993).
assessment that models this phase
doi:10.1007/s11664-010-1248-7 Wojciech Gierlotka, Thermodynamic Description of the Te-Tl Binary System Using the Associate Solution Model, Journal of Elec Materi 39, 1319-1325 (2010).
assessment that models this phase

HCP_A3 (Te–Tl)

Id: phase:te-tl:hcp-a3; status assigned
Structure: Mg · A3 · hP2 · P6_3/mmc (194); type st:a3-mg-hp2; tier A: standard phase name; confidence high
Stoichiometry: Tl 1.0000
Stability: stable in 2 of 2 calculated diagram(s): 300–507 K, x(Te) 0–0
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:te-tl:hcp-a3
tdb: tdb:TlTe-10Gie.tdb:HCP_A3, tdb:TlTe-93Oh.tdb:HCP_A3

TDB models of HCP_A3 (2): PHASE and CONSTITUENT statements as written

TlTe-10Gie.tdb: HCP_A3, type code %A, sha256 57b4b9547de53b52…

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

TlTe-93Oh.tdb: HCP_A3, type code %A, sha256 395f5718ea4ec440…

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

Example references (2 of 2; assessments first):

doi:10.1007/BF02667808 C.-S. Oh, D.N. Lee, J. Phase Equilib., 14, 197-204(1993).
assessment that models this phase
doi:10.1007/s11664-010-1248-7 Wojciech Gierlotka, Thermodynamic Description of the Te-Tl Binary System Using the Associate Solution Model, Journal of Elec Materi 39, 1319-1325 (2010).
assessment that models this phase

ION (Te–Tl)

Id: phase:te-tl:ion; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 504.09–2500 K, x(Te) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:te-tl:ion
tdb: tdb:TlTe-93Oh.tdb:ION

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

TlTe-93Oh.tdb: ION, type code %, sha256 395f5718ea4ec440…

31: PHASE ION:Y % 2 1 1 !
32: CONST ION:Y : TL+1 : TE-2 VA TE : !

Example references (1 of 1; assessments first):

doi:10.1007/BF02667808 C.-S. Oh, D.N. Lee, J. Phase Equilib., 14, 197-204(1993).
assessment that models this phase

LIQUID (Te–Tl)

Id: phase:te-tl:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 497.28–2500 K, x(Te) 0–1
Literature: 11 values (11 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:te-tl:liquid
paper: paper:10.1007/s11664-010-1248-7:L, paper:10.1007/s11664-010-1248-7:L2
tdb: tdb:TlTe-10Gie.tdb:LIQUID

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

TlTe-10Gie.tdb: LIQUID, type code %, sha256 57b4b9547de53b52…

29: PHASE LIQUID:L % 1 1 !
30: CONST LIQUID:L : TE TL TL2TE : !

Example references (2 of 2; assessments first):

doi:10.1007/s11664-010-1248-7 Wojciech Gierlotka, Thermodynamic Description of the Te-Tl Binary System Using the Associate Solution Model, Journal of Elec Materi 39, 1319-1325 (2010).
assessment that models this phase; reports values for this phase
doi:10.1361/105497100770339833 H. Okamoto, Te-Tl (Tellurium-Thallium), JPE 21, 501-501 (2000).
cited as the source of values for this phase

TL2TE (Te–Tl)

Id: phase:te-tl:tl2te; status assigned
Structure: Tl2Te · mC132 · C2/c (15); type st:tl2te-mc132; tier B: DFT-supported (unique MP + OQMD match); confidence high
Stoichiometry: Te 0.3333, Tl 0.6667
Stability: stable in 1 of 1 calculated diagram(s): 300–691.29 K, x(Te) 0.33333–0.33333
Literature: 3 values (3 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:te-tl:tl2te
mp: mp:mp-aaabhebp
oqmd: oqmd:oqmd-644246
paper: paper:10.1007/s11664-010-1248-7:TeTl2
tdb: tdb:TlTe-10Gie.tdb:TL2TE

TDB models of TL2TE (1): PHASE and CONSTITUENT statements as written

TlTe-10Gie.tdb: TL2TE, type code %, sha256 57b4b9547de53b52…

54: PHASE TL2TE % 2 2 1 !
55: CONST TL2TE : TL : TE : !

Example references (2 of 2; assessments first):

doi:10.1007/s11664-010-1248-7 Wojciech Gierlotka, Thermodynamic Description of the Te-Tl Binary System Using the Associate Solution Model, Journal of Elec Materi 39, 1319-1325 (2010).
assessment that models this phase; reports values for this phase
doi:10.1361/105497100770339833 H. Okamoto, Te-Tl (Tellurium-Thallium), JPE 21, 501-501 (2000).
cited as the source of values for this phase

TL2TE3 (Te–Tl)

Id: phase:te-tl:tl2te3; status assigned
Structure: Tl2Te3 · mC20 · C2/c (15); type st:tl2te3-mc20; 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 (dft_space_group_15_matches_2_structure_types, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Te 0.6000, Tl 0.4000
Stability: stable in 2 of 2 calculated diagram(s): 300–507.89 K, x(Te) 0.6–0.6
Literature: 14 values (14 accepted) from 2 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:te-tl:tl2te3
paper: paper:10.1007/bf02667808:Te3Tl2, paper:10.1007/s11664-010-1248-7:Te3Tl2
tdb: tdb:TlTe-10Gie.tdb:TL2TE3, tdb:TlTe-93Oh.tdb:TL2TE3

TDB models of TL2TE3 (2): PHASE and CONSTITUENT statements as written

TlTe-10Gie.tdb: TL2TE3, type code %, sha256 57b4b9547de53b52…

69: PHASE TL2TE3 % 2 2 3 !
70: CONST TL2TE3 : TL : TE : !

TlTe-93Oh.tdb: TL2TE3, type code %, sha256 395f5718ea4ec440…

66: PHASE TL2TE3 % 2 2 3 !
67: CONST TL2TE3 : TL : TE : !

Example references (3 of 3; assessments first):

doi:10.1007/BF02667808 C.-S. Oh, D.N. Lee, J. Phase Equilib., 14, 197-204(1993).
assessment that models this phase; reports values for this phase
doi:10.1007/s11664-010-1248-7 Wojciech Gierlotka, Thermodynamic Description of the Te-Tl Binary System Using the Associate Solution Model, Journal of Elec Materi 39, 1319-1325 (2010).
assessment that models this phase; reports values for this phase
doi:10.1361/105497100770339833 H. Okamoto, Te-Tl (Tellurium-Thallium), JPE 21, 501-501 (2000).
cited as the source of values for this phase

TL5TE3 (Te–Tl)

Id: phase:te-tl:tl5te3; status assigned
Structure: Bi3In5 · tI32 · I4/mcm (140); type st:bi3in5-ti32; 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 2 of 2 calculated diagram(s): 300–727.78 K, x(Te) 0.33333–0.375
Literature: 15 values (15 accepted) from 2 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:te-tl:tl5te3
paper: paper:10.1007/bf02667808:γ, paper:10.1007/s11664-010-1248-7:Te3Tl5
tdb: tdb:TlTe-10Gie.tdb:TL5TE3, tdb:TlTe-93Oh.tdb:TL5TE3

TDB models of TL5TE3 (2): PHASE and CONSTITUENT statements as written

TlTe-10Gie.tdb: TL5TE3, type code %, sha256 57b4b9547de53b52…

59: PHASE TL5TE3 % 2 5 3  !
60: CONST TL5TE3 : TL : TE TL : !

TlTe-93Oh.tdb: TL5TE3, type code %, sha256 395f5718ea4ec440…

56: PHASE TL5TE3 % 3 10 5 1 !
57: CONST TL5TE3 : TL : TE : TE VA : !

Example references (3 of 3; assessments first):

doi:10.1007/BF02667808 C.-S. Oh, D.N. Lee, J. Phase Equilib., 14, 197-204(1993).
assessment that models this phase; reports values for this phase
doi:10.1007/s11664-010-1248-7 Wojciech Gierlotka, Thermodynamic Description of the Te-Tl Binary System Using the Associate Solution Model, Journal of Elec Materi 39, 1319-1325 (2010).
assessment that models this phase; reports values for this phase
doi:10.1361/105497100770339833 H. Okamoto, Te-Tl (Tellurium-Thallium), JPE 21, 501-501 (2000).
cited as the source of values for this phase

TLTE (Te–Tl)

Id: phase:te-tl:tlte; status assigned
Structure: TlTe · tI32 · I4/mcm (140); type st:tlte-ti32; 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 (mp_oqmd_space_groups_differ, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Te 0.5000, Tl 0.5000
Stability: stable in 2 of 2 calculated diagram(s): 300–573.85 K, x(Te) 0.5–0.5
Literature: 14 values (14 accepted) from 2 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:te-tl:tlte
paper: paper:10.1007/bf02667808:TeTl, paper:10.1007/s11664-010-1248-7:TeTl
tdb: tdb:TlTe-10Gie.tdb:TLTE, tdb:TlTe-93Oh.tdb:TLTE

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

TlTe-10Gie.tdb: TLTE, type code %, sha256 57b4b9547de53b52…

64: PHASE TLTE % 2 1 1 !
65: CONST TLTE : TL : TE : !

TlTe-93Oh.tdb: TLTE, type code %, sha256 395f5718ea4ec440…

61: PHASE TLTE % 2 1 1 !
62: CONST TLTE : TL : TE : !

Example references (3 of 3; assessments first):

doi:10.1007/BF02667808 C.-S. Oh, D.N. Lee, J. Phase Equilib., 14, 197-204(1993).
assessment that models this phase; reports values for this phase
doi:10.1007/s11664-010-1248-7 Wojciech Gierlotka, Thermodynamic Description of the Te-Tl Binary System Using the Associate Solution Model, Journal of Elec Materi 39, 1319-1325 (2010).
assessment that models this phase; reports values for this phase
doi:10.1361/105497100770339833 H. Okamoto, Te-Tl (Tellurium-Thallium), JPE 21, 501-501 (2000).
cited as the source of values for this phase

Please cite

R. Arróyave, J. Saal, D. Shin, ORCHID-Registry: phase registry of binary systems (version 2026.10; Version 1, machine-extracted), Zenodo (2026). doi:10.5281/zenodo.23735970
R. Arróyave, J. Saal, D. Shin, ORCHID data: umbrella record of the ORCHID datasets (version 2026.10; Version 1, machine-extracted), Zenodo (2026). doi:10.5281/zenodo.23736065

Also cite B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, https://doi.org/10.1016/j.calphad.2025.102833 (CC BY 4.0), and the original assessment named in each file; A. Jain et al., The Materials Project: A materials genome approach to accelerating materials innovation, APL Materials 1 (2013) 011002, https://doi.org/10.1063/1.4812323 (CC BY 4.0); J. E. Saal et al., JOM 65 (2013) 1501, https://doi.org/10.1007/s11837-013-0755-4 and S. Kirklin et al., npj Comput. Mater. 1 (2015) 15010, https://doi.org/10.1038/npjcompumats.2015.10 (CC BY 4.0); the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work). Version 1, machine-extracted: values were read by language-model readers constrained to quote their source and checked automatically, and the release was then audited on the printed pages by adversarial audits, an independent second review of fit-facing records and a preliminary human review of a frozen sample. Flags such as accepted and ESPEI-ready record screening results, not certification; known issues are listed in the release notes.

@misc{orchid_phase_registry_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Registry: phase registry of binary systems}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735970},
  url       = {https://doi.org/10.5281/zenodo.23735970},
  note      = {Version 1, machine-extracted}
}

@misc{orchid_data_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID data: umbrella record of the ORCHID datasets}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23736065},
  url       = {https://doi.org/10.5281/zenodo.23736065},
  note      = {Version 1, machine-extracted}
}