K₂-xFe₄+ySe₅

Iron-based

How to read these data

Each property selection has its own source, conditions and result identity. Expand a value to inspect them. Observed and Computed describe the source report; catalogue eligibility and a clear anomaly check do not establish scientific validity. Different properties need not describe the same sample or state.

Missing pressure is not ambient pressure. Text structure claims remain separate from validated coordinates. A source-linked value does not override a material review hold. Source recovery candidates and external calculated references do not replace selected measurements.

Tc max

—Not reported

Not reported. A legacy catalogue value is not substituted without its contributing result.

Selection: none. Catalogue property only, not a joint observation.

Tc ambient

—Not reported

Not reported. A legacy catalogue value is not substituted without its contributing result.

Selection: none. Catalogue property only, not a joint observation.

Catalogue year

2018

Source links · not replications

1 IDs

Reported classifications and mechanism evidence

Reported classifications, priors and support

Unknown, not reported, reported false and not applicable are distinct states. A scoped negative report does not establish universal absence. Reported classifications are source assertions, not scientific approval or a joint Tc/state observation.

Current reported-property projection; inspect individual evidence before reuse.
Property	Reported status / value	Evidence and conditions
Pairing symmetry	UnknownNot a negative finding Basis: unresolved retained records	Inspect 1 retained report Retained report: Unavailable Source assertion only; not a verified material property. Result: legacy-semantics:f95bd45fd93b24ab7209471b08234d55adbf31d7bff62287c8e9ef36cccf078c · revision: Unknown Retained occurrences: 1 · repeated records are not replications. arxiv:1804.09876 Identifiers: paper_id: arxiv:1804.09876 Source status: active · origin: Observed · role: primary Method: Not reported · evidence status: unknown State / conditions: { "pressure": { "state": "not_reported", "relation": "unreported", "value": null, "lower": null, "upper": null, "uncertainty": null } } Detection conditions:

Evidence (1 record from 1 linked bibliographic IDs)

Each row is a retained extraction with its own conditions and source.

Tc type and lexical criterion remain separate retained fields.

How to read these records

Retained values and catalogue eligibility do not establish scientific approval. Operational anomaly checks flag records for review; no findings is not scientific validation. Repeated reports are not independent replications. Open each row’s review details or the retained-record Archive to inspect the supplied policy metadata.

Retained Tc (K)	Record origin / role	Review	P (GPa)	Sample	Method	Pairing	Year	Source tier	Paper
—Criterion not supplied	Observedprimary source role	Review details Policy: anomaly-review/1.0.0. No findings is not scientific acceptance. A format issue means the parser or metadata needs review, not that the physics is impossible. Result: legacy-result:f95bd45fd93b24ab7209471b08234d55adbf31d7bff62287c8e9ef36cccf078c Operational references are review triggers, not physical upper limits. Values are not clipped or replaced by this display; source corrections require separate evidence-backed revision.

Retained-record Archive

Catalogue eligible — not scientific approval

Catalogue eligibility is a read-policy decision, not experimental confirmation or permission to use every property for ML.

Source status and revision

Policy: material-visibility/1.0.0 · source status: active · review revision: 45bea7409fbf9ba3c86f4ee07bef39e1dbd772a068c6667395a0b2c160449cd3

Only scientific fields authorized by the server for this material are shown. This is not a full historical archive, the complete source document or a guarantee that all previously excluded data can be recovered. Restricted or quarantined data is not retrieved through another route.

Policy: anomaly-review/1.0.0 · scope: retained material records · field policy: scientific allowlist, not full source

Showing 1 returned records. Raw means the retained extraction representation; it is not necessarily a verbatim source quotation or an accepted scientific result.

Download authorized Archive with review metadata (JSON)

Structure and lattice evidence

Structure and phase · pending evidence review

Textual phase, crystal and space-group claims remain proposals until their material, sample/state and source revision are reviewed. Literal text matching is not scientific approval. No validated coordinates or structural descriptors are supplied by this view.

Phase: UnknownText label ≠ coordinate structure
Crystal structure: Pending source reviewText label ≠ coordinate structure
Space group: Pending source reviewText label ≠ coordinate structure

Retained proposals: 2 · Unassigned mentions: 0. Counts are not independent structures or accepted results.

Inspect pending structure proposals

space_group: I4/m
Pending review · unassigned
Proposal: structure-proposal:396f63f196f1a4a5671bd06b615e6f9c2f5e52944d98f71f23f873694b0979c9
arxiv:1804.09876
Reported source content hash: Unknown · publication revision: Unknown
Source bytes and source revision are not independently rechecked by this page.
Source excerpt withheld pending access and redistribution review. Source availability does not establish permission to publish an excerpt.
Reported excerpt hash: Unknown
Locator: Unknown · ?–?. Assembled-text offsets are not PDF page numbers.
Proposed subject / state:
```
{
  "formula": "K2-xFe4+ySe5",
  "pressure": {
    "state": "not_reported",
    "relation": "unreported"
  },
  "doping": {
    "status": "unreported",
    "relation": "unreported",
    "unit": "1"
  }
}
```

Superconducting parameters

Gap structure: —Not reported
Not reported. A legacy catalogue value is not substituted without its contributing result.
Selection: none. Catalogue property only, not a joint observation.
Hc2: —Not reported
Not reported. A legacy catalogue value is not substituted without its contributing result.
Selection: none. Catalogue property only, not a joint observation.
λ_eph (electron–phonon coupling): —Not reported
Not reported. A legacy catalogue value is not substituted without its contributing result.
Selection: none. Catalogue property only, not a joint observation.
ω_log

Competing orders

Competing order: —Not reported
Not reported. A legacy catalogue value is not substituted without its contributing result.
Selection: none. Catalogue property only, not a joint observation.
T_CDW: —Not reported
Not reported. A legacy catalogue value is not substituted without its contributing result.
Selection: none. Catalogue property only, not a joint observation.
T_SDW: —Not reported
Not reported. A legacy catalogue value is not substituted without its contributing result.
Selection: none. Catalogue property only, not a joint observation.
T_AFM: —

Samples and pressure evidence

Samples & pressure

Sample form: —Not reported
Not reported. A legacy catalogue value is not substituted without its contributing result.
Selection: none. Catalogue property only, not a joint observation.
Substrate: —Not reported
Not reported. A legacy catalogue value is not substituted without its contributing result.
Selection: none. Catalogue property only, not a joint observation.
Pressure type: —Not reported
Not reported. A legacy catalogue value is not substituted without its contributing result.
Selection: none. Catalogue property only, not a joint observation.
Doping type

Field coverage & source recovery

See which fields are retained, which need source review, and where missing information can be recovered.

Checking linked source chunks…

MDR SuperCon referencesInspect reported criteria

Browse the separate Organic source table

Materials Project calculated referencesInspect computed structures

Materials Project structures with the same fixed composition. Phase, sample and pressure correspondence require separate review.

Loading calculated reference data…

Crystal structure references · COD

Published crystal metadata matched by composition. These references are separate from this material’s retained properties; sample and phase correspondence need review.

NOMAD calculation referencesInspect calculation tasks

Only tasks with electronic band gaps (includes reported zero)

Open private field cases for this material · Authorized workspace; source proposals remain pending.

K₂-xFe₄+ySe₅

Reported classifications, priors and support

Evidence (1 record from 1 linked bibliographic IDs)

Structure and phase · pending evidence review

Superconducting parameters

Competing orders

Samples & pressure

Field coverage & source recovery

Family and domain priors · Inferred, not measured

Variation, extraction conflicts and scientific disputes

Reported Tc / state variability

Extraction inconsistency

Scientific dispute

Source support counts · not independent confirmation

Lattice parameters — separate source selections

EPC association — separate from model applicability

K2-xFe4+ySe5

Reported classifications, priors and support

Evidence (1 record from 1 linked bibliographic IDs)

Structure and phase · pending evidence review

Superconducting parameters

Competing orders

Samples & pressure

Field coverage & source recovery

Family and domain priors · Inferred, not measured

Variation, extraction conflicts and scientific disputes

Reported Tc / state variability

Extraction inconsistency

Scientific dispute

Source support counts · not independent confirmation

Lattice parameters — separate source selections

EPC association — separate from model applicability

K₂-xFe₄+ySe₅