Cs–O phases

15 phases (tier A 4, tier B 1, tier C 3, liquid 2, gas 2, needs_review 3); 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 · Cs–O system page · Markdown · field reference

Phases of the Cs–O system (15)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:cs-o:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 299.47–301.59 K, x(O) 0–0	0	1
CS2O_C19 phase:cs-o:cs2o-c19	CdCl2 · C19 · hR3 · R-3m (166)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–375 K, x(O) 0.33333–0.33333	0	1
CS2O2 phase:cs-o:cs2o2		needs_review	stable in 1 of 1 calculated diagram(s): 300–335 K, x(O) 0.5–0.5	18	1
CS3O phase:cs-o:cs3o	Cs3O · hP8 · P6_3/mcm (193)	tier B: DFT-supported (unique MP + OQMD match)	stable in 1 of 1 calculated diagram(s): 300–430.17 K, x(O) 0.25–0.25	16	1
CS4O phase:cs-o:cs4o	Cs4O · oP60 · Pna2_1 (33)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–325.17 K, x(O) 0.2–0.2	15	1
CS7O phase:cs-o:cs7o	Cs7O · hP24 · P-6m2 (187)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	not stable in 1 calculated diagram(s)	14	1
CS7O2 phase:cs-o:cs7o2	Cs11O3 · mP56 · P2_1/c (14)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	not stable in 1 calculated diagram(s)	13	1
CSO2_C11A phase:cs-o:cso2-c11a		needs_review	not stable in 1 calculated diagram(s)	0	1
CSO3 phase:cs-o:cso3		needs_review	not stable in 1 calculated diagram(s)	23	1
FCC_A1 phase:cs-o:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	not stable in 1 calculated diagram(s)	0	1
GAS phase:cs-o:gas	gas	gas	stable in 1 of 1 calculated diagram(s): 557.05–1433.53 K, x(O) 0–1	0	1
HCP_A3 phase:cs-o:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	not stable in 1 calculated diagram(s)	0	1
ION phase:cs-o:ion	liquid	liquid	stable in 1 of 1 calculated diagram(s): 299.47–1433.53 K, x(O) 0–0.72819	0	1
LIQUID phase:cs-o:liquid	liquid	liquid	not stable in 1 calculated diagram(s)	2	1
O2GAS phase:cs-o:o2gas	gas	gas	not stable in 1 calculated diagram(s)	0	1

BCC_A2 (Cs–O)

Id: phase:cs-o:bcc-a2; status assigned
Structure: W · A2 · cI2 · Im-3m (229); type st:a2-w-ci2; tier A: standard phase name; confidence high
Stoichiometry: Cs 1.0000
Stability: stable in 1 of 1 calculated diagram(s): 299.47–301.59 K, x(O) 0–0
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:cs-o:bcc-a2
tdb: tdb:CsO-15Gue.tdb:BCC_A2

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

CsO-15Gue.tdb: BCC_A2, type code %B, sha256 5219d7e34c2f9d74…

48: PHASE BCC_A2 %B 2 1 3 !
49: CONST BCC_A2 : CS : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.02.002 C. Guéneau, J.-L. Flèche, Thermodynamic assessment of the cesium–oxygen system by coupling density functional theory and CALPHAD approaches, Calphad 49, 67-78 (2015).
assessment that models this phase

CS2O_C19 (Cs–O)

Id: phase:cs-o:cs2o-c19; status assigned
Structure: CdCl2 · C19 · hR3 · R-3m (166); type st:c19-cdcl2-hr3; tier A: standard phase name; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 300–375 K, x(O) 0.33333–0.33333
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:cs-o:cs2o-c19
tdb: tdb:CsO-15Gue.tdb:CS2O_C19

TDB models of CS2O_C19 (1): PHASE and CONSTITUENT statements as written

CsO-15Gue.tdb: CS2O_C19, type code %A, sha256 5219d7e34c2f9d74…

78: PHASE CS2O_C19:I %A 2 2 1 !
79: CONST CS2O_C19:I : CS+1 : O-2 : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.02.002 C. Guéneau, J.-L. Flèche, Thermodynamic assessment of the cesium–oxygen system by coupling density functional theory and CALPHAD approaches, Calphad 49, 67-78 (2015).
assessment that models this phase

CS2O2 (Cs–O)

Id: phase:cs-o:cs2o2; status needs_review
No structure assigned. Why: assessment_declared_compound_differs_from_site_ratios; no_structure_token; off_stoichiometric_model
Candidate (dft_mp): Immm (71) — on-hull MP Cs2O2 at x(O)=0.5000
Candidate (dft_oqmd): Immm (71) — on-hull OQMD Cs1 O1 at x(O)=0.5000
Candidate (sgte_mmc2): Rb2O2 · oI8 · Immm (71) — Hallstedt 2025 mmc2 row for CS2O2: Cs2O2
Candidate (tdb_comment): Rb2O2 · oI8 · Immm — CsO-15Gue.tdb: 'Prototype Rb2O2 (oI8, Immm)'
Stability: stable in 1 of 1 calculated diagram(s): 300–335 K, x(O) 0.5–0.5
Literature: 18 values (18 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cs-o:cs2o2
paper: paper:10.1016/j.calphad.2015.02.002:Cs2O2
tdb: tdb:CsO-15Gue.tdb:CS2O2

TDB models of CS2O2 (1): PHASE and CONSTITUENT statements as written

CsO-15Gue.tdb: CS2O2, type code %A, sha256 5219d7e34c2f9d74…

83: PHASE CS2O2:I %A 2 2 1 !
84: CONST CS2O2:I : CS+1 : O2-2 : !

Example references (5 of 5; assessments first):

doi:10.1016/j.calphad.2015.02.002 C. Guéneau, J.-L. Flèche, Thermodynamic assessment of the cesium–oxygen system by coupling density functional theory and CALPHAD approaches, Calphad 49, 67-78 (2015).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-3115(79)90163-6 C.F Knights, B.A Phillips, The Cs-O system;Phase diagram and oxygen potentials, Journal of Nuclear Materials 84, 196-206 (1979).
cited as the source of values for this phase
doi:10.1016/0364-5916(91)90030-n A.T. Dinsdale, SGTE data for pure elements, Calphad 15, 317-425 (1991).
cited as the source of values for this phase
doi:10.1063/1.555706 R. H. Lamoreaux, D. L. Hildenbrand, High Temperature Vaporization Behavior of Oxides. I. Alkali Metal Binary Oxides, Journal of Physical and Chemical Reference Data 13, 151-173 (1984).
cited as the source of values for this phase
doi:10.1016/j.ces.2010.01.024 Anubhav Jain, S.-A. Seyed-Reihani, Christopher C. Fischer, David J. Couling, Gerbrand Ceder, William H. Green, Ab initio screening of metal sorbents for elemental mercury capture in syngas streams, Chemical Engineering Science 65, 3025-3033 (2010).
cited as the source of values for this phase

CS3O (Cs–O)

Id: phase:cs-o:cs3o; status assigned
Structure: Cs3O · hP8 · P6_3/mcm (193); type st:cs3o-hp8; tier B: DFT-supported (unique MP + OQMD match); confidence high
Stoichiometry: Cs 0.7500, O 0.2500
Stability: stable in 1 of 1 calculated diagram(s): 300–430.17 K, x(O) 0.25–0.25
Literature: 16 values (16 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:cs-o:cs3o
mp: mp:mp-aaabdavm
oqmd: oqmd:oqmd-2013713
paper: paper:10.1016/j.calphad.2015.02.002:Cs3O
tdb: tdb:CsO-15Gue.tdb:CS3O

TDB models of CS3O (1): PHASE and CONSTITUENT statements as written

CsO-15Gue.tdb: CS3O, type code %, sha256 5219d7e34c2f9d74…

73: PHASE CS3O % 2 3 1 !
74: CONST CS3O : CS : O : !

Example references (3 of 3; assessments first):

doi:10.1016/j.calphad.2015.02.002 C. Guéneau, J.-L. Flèche, Thermodynamic assessment of the cesium–oxygen system by coupling density functional theory and CALPHAD approaches, Calphad 49, 67-78 (2015).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-3115(79)90163-6 C.F Knights, B.A Phillips, The Cs-O system;Phase diagram and oxygen potentials, Journal of Nuclear Materials 84, 196-206 (1979).
cited as the source of values for this phase
doi:10.1016/j.ces.2010.01.024 Anubhav Jain, S.-A. Seyed-Reihani, Christopher C. Fischer, David J. Couling, Gerbrand Ceder, William H. Green, Ab initio screening of metal sorbents for elemental mercury capture in syngas streams, Chemical Engineering Science 65, 3025-3033 (2010).
cited as the source of values for this phase

CS4O (Cs–O)

Id: phase:cs-o:cs4o; status assigned
Structure: Cs4O · oP60 · Pna2_1 (33); type st:cs4o-op60; 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: Cs 0.8000, O 0.2000
Stability: stable in 1 of 1 calculated diagram(s): 300–325.17 K, x(O) 0.2–0.2
Literature: 15 values (15 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cs-o:cs4o
paper: paper:10.1016/j.calphad.2015.02.002:Cs4O
tdb: tdb:CsO-15Gue.tdb:CS4O

TDB models of CS4O (1): PHASE and CONSTITUENT statements as written

CsO-15Gue.tdb: CS4O, type code %, sha256 5219d7e34c2f9d74…

63: PHASE CS4O % 2 4 1 !
64: CONST CS4O : CS : O : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2015.02.002 C. Guéneau, J.-L. Flèche, Thermodynamic assessment of the cesium–oxygen system by coupling density functional theory and CALPHAD approaches, Calphad 49, 67-78 (2015).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-3115(79)90163-6 C.F Knights, B.A Phillips, The Cs-O system;Phase diagram and oxygen potentials, Journal of Nuclear Materials 84, 196-206 (1979).
cited as the source of values for this phase

CS7O (Cs–O)

Id: phase:cs-o:cs7o; status assigned
Structure: Cs7O · hP24 · P-6m2 (187); type st:cs7o-hp24; 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_mp, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Cs 0.8750, O 0.1250
Stability: not stable in 1 calculated diagram(s)
Literature: 14 values (14 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cs-o:cs7o
paper: paper:10.1016/j.calphad.2015.02.002:Cs7O
tdb: tdb:CsO-15Gue.tdb:CS7O

TDB models of CS7O (1): PHASE and CONSTITUENT statements as written

CsO-15Gue.tdb: CS7O, type code %, sha256 5219d7e34c2f9d74…

58: PHASE CS7O % 2 7 1 !
59: CONST CS7O : CS : O : !

Example references (3 of 3; assessments first):

doi:10.1016/j.calphad.2015.02.002 C. Guéneau, J.-L. Flèche, Thermodynamic assessment of the cesium–oxygen system by coupling density functional theory and CALPHAD approaches, Calphad 49, 67-78 (2015).
assessment that models this phase; reports values for this phase
doi:10.1002/zaac.19472550110 G. Brauer, Untersuchungen über das System Cäsium‐Sauerstoff, Z. Anorg. Chem. 255, 101-124 (1947).
cited as the source of values for this phase
doi:10.1016/0022-3115(79)90163-6 C.F Knights, B.A Phillips, The Cs-O system;Phase diagram and oxygen potentials, Journal of Nuclear Materials 84, 196-206 (1979).
cited as the source of values for this phase

CS7O2 (Cs–O)

Id: phase:cs-o:cs7o2; status assigned
Structure: Cs11O3 · mP56 · P2_1/c (14); type st:cs11o3-mp56; 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: Cs 0.7778, O 0.2222
Stability: not stable in 1 calculated diagram(s)
Literature: 13 values (13 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cs-o:cs7o2
paper: paper:10.1016/j.calphad.2015.02.002:Cs7O2
tdb: tdb:CsO-15Gue.tdb:CS7O2

TDB models of CS7O2 (1): PHASE and CONSTITUENT statements as written

CsO-15Gue.tdb: CS7O2, type code %, sha256 5219d7e34c2f9d74…

68: PHASE CS7O2 % 2 7 2 !
69: CONST CS7O2 : CS : O : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2015.02.002 C. Guéneau, J.-L. Flèche, Thermodynamic assessment of the cesium–oxygen system by coupling density functional theory and CALPHAD approaches, Calphad 49, 67-78 (2015).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-3115(79)90163-6 C.F Knights, B.A Phillips, The Cs-O system;Phase diagram and oxygen potentials, Journal of Nuclear Materials 84, 196-206 (1979).
cited as the source of values for this phase

CSO2_C11A (Cs–O)

Id: phase:cs-o:cso2-c11a; status needs_review
No structure assigned. Why: assessment_declared_blocked_by:site_ratios_contradict_C11_a; site_ratios_contradict_C11_a:CsO-15Gue.tdb
Candidate (name_token): CaC2 · C11_a · tI6 · I4/mmm (139) — Strukturbericht/word 'C11A' in the TDB name
Candidate (sgte_mmc2): CaC2 · C11_a · tI6 · I4/mmm (139) — Hallstedt 2025 mmc2 row for CSO2_C11A: CsO2
Candidate (tdb_comment): CaC2 · tI6 · I4/mmm — CsO-15Gue.tdb: 'Prototype CaC2 (tI6, I4/mmm)'
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:cs-o:cso2-c11a
tdb: tdb:CsO-15Gue.tdb:CSO2_C11A

TDB models of CSO2_C11A (1): PHASE and CONSTITUENT statements as written

CsO-15Gue.tdb: CSO2_C11A, type code %A, sha256 5219d7e34c2f9d74…

89: PHASE CSO2_C11A:I %A 2 1 1 !
90: CONST CSO2_C11A:I : CS+1 : O2-1 : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.02.002 C. Guéneau, J.-L. Flèche, Thermodynamic assessment of the cesium–oxygen system by coupling density functional theory and CALPHAD approaches, Calphad 49, 67-78 (2015).
assessment that models this phase

CSO3 (Cs–O)

Id: phase:cs-o:cso3; status needs_review
No structure assigned. Why: assessment_declared_compound_differs_from_site_ratios; no_structure_token; off_stoichiometric_model
Candidate (sgte_mmc2): RbO3 · mP16 · P2_1/c (14) — Hallstedt 2025 mmc2 row for CSO3: CsO3
Candidate (tdb_comment): RbO3 · mP16 · P2_1/c — CsO-15Gue.tdb: 'Prototype RbO3 (mP16, P2_1/c)'
Stability: not stable in 1 calculated diagram(s)
Literature: 23 values (23 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cs-o:cso3
paper: paper:10.1016/j.calphad.2015.02.002:CsO3
tdb: tdb:CsO-15Gue.tdb:CSO3

TDB models of CSO3 (1): PHASE and CONSTITUENT statements as written

CsO-15Gue.tdb: CSO3, type code %A, sha256 5219d7e34c2f9d74…

94: PHASE CSO3:I %A 2 1 1 !
95: CONST CSO3:I : CS+1 : O3-1 : !

Example references (3 of 3; assessments first):

doi:10.1016/j.calphad.2015.02.002 C. Guéneau, J.-L. Flèche, Thermodynamic assessment of the cesium–oxygen system by coupling density functional theory and CALPHAD approaches, Calphad 49, 67-78 (2015).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-3115(79)90163-6 C.F Knights, B.A Phillips, The Cs-O system;Phase diagram and oxygen potentials, Journal of Nuclear Materials 84, 196-206 (1979).
cited as the source of values for this phase
doi:10.1016/j.ces.2010.01.024 Anubhav Jain, S.-A. Seyed-Reihani, Christopher C. Fischer, David J. Couling, Gerbrand Ceder, William H. Green, Ab initio screening of metal sorbents for elemental mercury capture in syngas streams, Chemical Engineering Science 65, 3025-3033 (2010).
cited as the source of values for this phase

FCC_A1 (Cs–O)

Id: phase:cs-o:fcc-a1; status assigned
Structure: Cu · A1 · cF4 · Fm-3m (225); type st:a1-cu-cf4; tier A: standard phase name; confidence high
Stoichiometry: Cs 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:cs-o:fcc-a1
tdb: tdb:CsO-15Gue.tdb:FCC_A1

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

CsO-15Gue.tdb: FCC_A1, type code %A, sha256 5219d7e34c2f9d74…

43: PHASE FCC_A1 %A 2 1 1 !
44: CONST FCC_A1 : CS : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.02.002 C. Guéneau, J.-L. Flèche, Thermodynamic assessment of the cesium–oxygen system by coupling density functional theory and CALPHAD approaches, Calphad 49, 67-78 (2015).
assessment that models this phase

GAS (Cs–O)

Id: phase:cs-o:gas; status assigned
Structure: gas; type st:gas; gas; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 557.05–1433.53 K, x(O) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:cs-o:gas
tdb: tdb:CsO-15Gue.tdb:GAS

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

CsO-15Gue.tdb: GAS, type code %, sha256 5219d7e34c2f9d74…

100: PHASE GAS:G % 1 1 !
101: CONST GAS:G : CS CS2 CS2O CSO CS2O2 O O2 O3 : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.02.002 C. Guéneau, J.-L. Flèche, Thermodynamic assessment of the cesium–oxygen system by coupling density functional theory and CALPHAD approaches, Calphad 49, 67-78 (2015).
assessment that models this phase

HCP_A3 (Cs–O)

Id: phase:cs-o: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: Cs 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:cs-o:hcp-a3
tdb: tdb:CsO-15Gue.tdb:HCP_A3

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

CsO-15Gue.tdb: HCP_A3, type code %A, sha256 5219d7e34c2f9d74…

53: PHASE HCP_A3 %A 2 1 0.5 !
54: CONST HCP_A3 : CS : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.02.002 C. Guéneau, J.-L. Flèche, Thermodynamic assessment of the cesium–oxygen system by coupling density functional theory and CALPHAD approaches, Calphad 49, 67-78 (2015).
assessment that models this phase

ION (Cs–O)

Id: phase:cs-o:ion; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 299.47–1433.53 K, x(O) 0–0.72819
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:cs-o:ion
tdb: tdb:CsO-15Gue.tdb:ION

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

CsO-15Gue.tdb: ION, type code %, sha256 5219d7e34c2f9d74…

38: PHASE ION:Y % 2 1 1 !
39: CONST ION:Y : CS+1 : O-2 VA CSO2 O : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.02.002 C. Guéneau, J.-L. Flèche, Thermodynamic assessment of the cesium–oxygen system by coupling density functional theory and CALPHAD approaches, Calphad 49, 67-78 (2015).
assessment that models this phase

LIQUID (Cs–O)

Id: phase:cs-o:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stoichiometry: Cs 1.0000
Stability: not stable in 1 calculated diagram(s)
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cs-o:liquid
paper: paper:10.1016/j.calphad.2015.02.002:liquid
tdb: tdb:CsO-15Gue.tdb:LIQUID

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

CsO-15Gue.tdb: LIQUID, type code %, sha256 5219d7e34c2f9d74…

35: PHASE LIQUID:L % 1 1 !
36: CONST LIQUID:L : CS : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2015.02.002 C. Guéneau, J.-L. Flèche, Thermodynamic assessment of the cesium–oxygen system by coupling density functional theory and CALPHAD approaches, Calphad 49, 67-78 (2015).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-3115(79)90163-6 C.F Knights, B.A Phillips, The Cs-O system;Phase diagram and oxygen potentials, Journal of Nuclear Materials 84, 196-206 (1979).
cited as the source of values for this phase

O2GAS (Cs–O)

Id: phase:cs-o:o2gas; status assigned
Structure: gas; type st:gas; gas; confidence high
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:cs-o:o2gas
tdb: tdb:CsO-15Gue.tdb:O2GAS

TDB models of O2GAS (1): PHASE and CONSTITUENT statements as written

CsO-15Gue.tdb: O2GAS, type code %, sha256 5219d7e34c2f9d74…

97: PHASE O2GAS % 1 1 !
98: CONST O2GAS : O2 :!

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.02.002 C. Guéneau, J.-L. Flèche, Thermodynamic assessment of the cesium–oxygen system by coupling density functional theory and CALPHAD approaches, Calphad 49, 67-78 (2015).
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}
}