K–Te phases

9 phases (tier A 5, tier C 2, 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 · K–Te system page · Markdown · field reference

Phases of the K–Te system (9)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
HEXAGONAL_A8 phase:k-te:a8-hexagonal	gamma-Se · A8 · hP3 · P3_121 (152)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–722.66 K, x(Te) 1–1	0	1
BCC_A2 phase:k-te:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–336.53 K, x(Te) 0–0	0	1
FCC_A1 phase:k-te:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	not stable in 1 calculated diagram(s)	0	1
HCP_A3 phase:k-te:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	not stable in 1 calculated diagram(s)	0	1
K2TE_C1 phase:k-te:k2te-c1	CaF2 · C1 · cF12 · Fm-3m (225)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1199.75 K, x(Te) 0.33333–0.33333	0	1
K2TE3 phase:k-te:k2te3	K2Te3 · oP20 · Pnma (62)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–696.91 K, x(Te) 0.6–0.6	4	1
K5TE3 phase:k-te:k5te3	K5Te3 · tI32 · I4/m (87)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–914.75 K, x(Te) 0.375–0.375	2	1
KTE phase:k-te:kte		needs_review	stable in 1 of 1 calculated diagram(s): 300–684.65 K, x(Te) 0.5–0.5	4	1
LIQUID phase:k-te:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 336.53–2500 K, x(Te) 0–1	0	1

HEXAGONAL_A8 (K–Te)

Id: phase:k-te: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 1 of 1 calculated diagram(s): 300–722.66 K, x(Te) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:k-te:a8-hexagonal
tdb: tdb:KTe-14Che.tdb:HEXAGONAL_A8

TDB models of HEXAGONAL_A8 (1): PHASE and CONSTITUENT statements as written

KTe-14Che.tdb: HEXAGONAL_A8, type code %, sha256 1493e709e213dad3…

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

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2013.11.094 Yang Chen, Yajun Liu, Maoyou Chu, Lijun Wang, Phase diagrams and thermodynamic descriptions for Na–Te and K–Te binary systems, Journal of Alloys and Compounds 588, 605-610 (2014).
assessment that models this phase

BCC_A2 (K–Te)

Id: phase:k-te:bcc-a2; status assigned
Structure: W · A2 · cI2 · Im-3m (229); type st:a2-w-ci2; tier A: standard phase name; confidence high
Stoichiometry: K 1.0000
Stability: stable in 1 of 1 calculated diagram(s): 300–336.53 K, x(Te) 0–0
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:k-te:bcc-a2
tdb: tdb:KTe-14Che.tdb:BCC_A2

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

KTe-14Che.tdb: BCC_A2, type code %B, sha256 1493e709e213dad3…

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

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2013.11.094 Yang Chen, Yajun Liu, Maoyou Chu, Lijun Wang, Phase diagrams and thermodynamic descriptions for Na–Te and K–Te binary systems, Journal of Alloys and Compounds 588, 605-610 (2014).
assessment that models this phase

FCC_A1 (K–Te)

Id: phase:k-te:fcc-a1; status assigned
Structure: Cu · A1 · cF4 · Fm-3m (225); type st:a1-cu-cf4; tier A: standard phase name; confidence high
Stoichiometry: K 1.0000
Stability: not stable in 1 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:k-te:fcc-a1
tdb: tdb:KTe-14Che.tdb:FCC_A1

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

KTe-14Che.tdb: FCC_A1, type code %A, sha256 1493e709e213dad3…

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

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2013.11.094 Yang Chen, Yajun Liu, Maoyou Chu, Lijun Wang, Phase diagrams and thermodynamic descriptions for Na–Te and K–Te binary systems, Journal of Alloys and Compounds 588, 605-610 (2014).
assessment that models this phase

HCP_A3 (K–Te)

Id: phase:k-te: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: K 1.0000
Stability: not stable in 1 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:k-te:hcp-a3
tdb: tdb:KTe-14Che.tdb:HCP_A3

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

KTe-14Che.tdb: HCP_A3, type code %A, sha256 1493e709e213dad3…

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

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2013.11.094 Yang Chen, Yajun Liu, Maoyou Chu, Lijun Wang, Phase diagrams and thermodynamic descriptions for Na–Te and K–Te binary systems, Journal of Alloys and Compounds 588, 605-610 (2014).
assessment that models this phase

K2TE_C1 (K–Te)

Id: phase:k-te:k2te-c1; status assigned
Structure: CaF2 · C1 · cF12 · Fm-3m (225); type st:c1-caf2-cf12; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaaacpf and oqmd-11320, space group 225
Stoichiometry: K 0.6667, Te 0.3333
Stability: stable in 1 of 1 calculated diagram(s): 300–1199.75 K, x(Te) 0.33333–0.33333
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:k-te:k2te-c1
mp: mp:mp-aaaaacpf
oqmd: oqmd:oqmd-11320
tdb: tdb:KTe-14Che.tdb:K2TE_C1

TDB models of K2TE_C1 (1): PHASE and CONSTITUENT statements as written

KTe-14Che.tdb: K2TE_C1, type code %, sha256 1493e709e213dad3…

55: PHASE K2TE_C1 % 2 2 1 !
56: CONST K2TE_C1 : K : TE : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2013.11.094 Yang Chen, Yajun Liu, Maoyou Chu, Lijun Wang, Phase diagrams and thermodynamic descriptions for Na–Te and K–Te binary systems, Journal of Alloys and Compounds 588, 605-610 (2014).
assessment that models this phase

K2TE3 (K–Te)

Id: phase:k-te:k2te3; status assigned
Structure: K2Te3 · oP20 · Pnma (62); type st:k2te3-op20; 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_62_matches_7_structure_types, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: K 0.4000, Te 0.6000
Stability: stable in 1 of 1 calculated diagram(s): 300–696.91 K, x(Te) 0.6–0.6
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:k-te:k2te3
paper: paper:10.1016/j.jallcom.2013.11.094:K2Te3
tdb: tdb:KTe-14Che.tdb:K2TE3

TDB models of K2TE3 (1): PHASE and CONSTITUENT statements as written

KTe-14Che.tdb: K2TE3, type code %, sha256 1493e709e213dad3…

70: PHASE K2TE3 % 2 2 3 !
71: CONST K2TE3 : K : TE : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2013.11.094 Yang Chen, Yajun Liu, Maoyou Chu, Lijun Wang, Phase diagrams and thermodynamic descriptions for Na–Te and K–Te binary systems, Journal of Alloys and Compounds 588, 605-610 (2014).
assessment that models this phase; reports values for this phase

K5TE3 (K–Te)

Id: phase:k-te:k5te3; status assigned
Structure: K5Te3 · tI32 · I4/m (87); type st:k5te3-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_on_hull_entry_in_both, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: K 0.6250, Te 0.3750
Stability: stable in 1 of 1 calculated diagram(s): 300–914.75 K, x(Te) 0.375–0.375
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:k-te:k5te3
paper: paper:10.1016/j.jallcom.2013.11.094:K5Te3
tdb: tdb:KTe-14Che.tdb:K5TE3

TDB models of K5TE3 (1): PHASE and CONSTITUENT statements as written

KTe-14Che.tdb: K5TE3, type code %, sha256 1493e709e213dad3…

60: PHASE K5TE3 % 2 5 3 !
61: CONST K5TE3 : K : TE : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2013.11.094 Yang Chen, Yajun Liu, Maoyou Chu, Lijun Wang, Phase diagrams and thermodynamic descriptions for Na–Te and K–Te binary systems, Journal of Alloys and Compounds 588, 605-610 (2014).
assessment that models this phase; reports values for this phase

KTE (K–Te)

Id: phase:k-te:kte; status needs_review
No structure assigned. Why: mp_oqmd_space_groups_differ; no_structure_token; sgte_mmc2_rows_disagree
Candidate (dft_mp): P6_3/mmc (194) — on-hull MP KTe at x(TE)=0.5000
Candidate (dft_oqmd): P-62m (189) — on-hull OQMD K1 Te1 at x(TE)=0.5000
Candidate (sgte_mmc2): Li2O2 · hP8 · P6_3/mmc (194) — Hallstedt 2025 mmc2 row for KTE: KTe (high T)
Candidate (sgte_mmc2): Na2O2 · hP12 · P-62m (189) — Hallstedt 2025 mmc2 row for KTE: KTe (low T)
Candidate (tdb_comment): Na2O2 · hP12 · P-62m — KTe-14Che.tdb: 'Prototype Na2O2 (hP12, P-62m), low T; Li2O2 (hP8, P6_3/mmc), high T'
Stoichiometry: K 0.5000, Te 0.5000
Stability: stable in 1 of 1 calculated diagram(s): 300–684.65 K, x(Te) 0.5–0.5
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:k-te:kte
paper: paper:10.1016/j.jallcom.2013.11.094:KTe
tdb: tdb:KTe-14Che.tdb:KTE

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

KTe-14Che.tdb: KTE, type code %, sha256 1493e709e213dad3…

65: PHASE KTE % 2 1 1 !
66: CONST KTE : K : TE : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2013.11.094 Yang Chen, Yajun Liu, Maoyou Chu, Lijun Wang, Phase diagrams and thermodynamic descriptions for Na–Te and K–Te binary systems, Journal of Alloys and Compounds 588, 605-610 (2014).
assessment that models this phase; reports values for this phase

LIQUID (K–Te)

Id: phase:k-te:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 336.53–2500 K, x(Te) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:k-te:liquid
tdb: tdb:KTe-14Che.tdb:LIQUID

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

KTe-14Che.tdb: LIQUID, type code %, sha256 1493e709e213dad3…

30: PHASE LIQUID:L % 1 1 !
31: CONST LIQUID:L : K K2TE K2TE3 TE : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2013.11.094 Yang Chen, Yajun Liu, Maoyou Chu, Lijun Wang, Phase diagrams and thermodynamic descriptions for Na–Te and K–Te binary systems, Journal of Alloys and Compounds 588, 605-610 (2014).
assessment that models 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}
}