https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE
.trig | .trig.txt | .jelly | .jelly.txt | .jsonld | .jsonld.txt | .nq | .nq.txt | .xml | .xml.txt
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sub:Head {
this: a np:Nanopublication;
np:hasAssertion sub:assertion;
np:hasProvenance sub:provenance;
np:hasPublicationInfo sub:pubinfo .
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sub:assertion {
<https://w3id.org/delphi/resource/assessment/steno1669-01--claim-test> a <https://w3id.org/delphi/ontology/Assessment>;
dc:description "For each COD entry with formula O2 Si in P3121 or P3221 passing the pre-registered ambient filter, the prism-rhombohedron angle 90 + atan(2 c / (sqrt(3) a)) was computed from the refined cell; SD and range across entries compared with the pre-registered thresholds.";
<http://www.w3.org/2000/01/rdf-schema#comment> "Measured: 0.3299 standard deviation of the (10-10)^(10-11) interfacial angle across alpha-quartz cells (degrees) (n = 45). Interpretation: Steno observed angles with a goniometer-less eye on natural specimens; here the angle is computed from the refined hexagonal cell (tan of the half-angle from c/a), so the test asks whether independent laboratories find one cell for the species, which is what makes the angles constant. Face lengths are not in the data; the claim's contrast with varying habit is not tested. The classical value is 141 deg 47 min; the mean is reported against it.";
<http://www.w3.org/2000/01/rdf-schema#label> "Claim test of steno1669-01: mixed, confidence 0.6";
<http://www.w3.org/2000/01/rdf-schema#seeAlso> <https://github.com/fractastical/delphisci/blob/bf2af6ee0a84e23ffa6414ad7a0a50a8c276506e/test-data/claim-tests/crystals-and-form/steno1669-01/result.json>;
prov:wasAttributedTo <https://w3id.org/delphi/resource/agent/delphisci-claim-tester-claude-fable-5-1>;
<https://w3id.org/delphi/ontology/admissibleDatasets> "Planned datasets: cod-search-api";
<https://w3id.org/delphi/ontology/assessmentType> "claim-test/0.1.0";
<https://w3id.org/delphi/ontology/dataKind> "physical";
<https://w3id.org/delphi/ontology/disconfirmingObservation> "Standard deviation above 1 degree: refutes. Between 0.1 and 1 degree, or range above 0.5 degree with SD below 0.1: mixed. Fewer than 10 qualifying entries: inconclusive.";
<https://w3id.org/delphi/ontology/evidenceAgainst> "The COD's celltemp and cellpressure fields are empty for the high-pressure (to 6 GPa) and high-temperature series in this set, so the pre-registered ambient filter admits them; the dispersion the verdict rests on is theirs. The nine entries whose titles name no such conditions have SD 0.03 degree (reported only).",
"The angle is computed from the cell, not measured on a specimen; face lengths are not in the data, so the contrast with varying habit is not tested.";
<https://w3id.org/delphi/ontology/expectedObservation> "Over all COD entries with formula O2 Si in space groups P 31 2 1 or P 32 2 1 at ambient conditions (celltemp null or 273-313 K; cellpressure null or <= 0.2 GPa), the standard deviation of the (10-10)^(10-11) interfacial angle is below 0.1 degree and the full range is below 0.5 degree: supports.";
<https://w3id.org/delphi/ontology/failCriterion> "Standard deviation above 1 degree: refutes. Between 0.1 and 1 degree, or range above 0.5 degree with SD below 0.1: mixed. Fewer than 10 qualifying entries: inconclusive.";
<https://w3id.org/delphi/ontology/hasConfidence> "0.6"^^xsd:double;
<https://w3id.org/delphi/ontology/hasEvidence> <https://w3id.org/delphi/resource/evidence/steno1669-01--claim-test--dataset-1>;
<https://w3id.org/delphi/ontology/hasVerdict> "mixed";
<https://w3id.org/delphi/ontology/hypothesis> "If interfacial angles are constant for a species, the angle between the prism face (10-10) and the rhombohedron face (10-11) of alpha-quartz, which depends only on c/a, is the same in every independently refined alpha-quartz structure.";
<https://w3id.org/delphi/ontology/inferenceMethod> "For each COD entry with formula O2 Si in P3121 or P3221 passing the pre-registered ambient filter, the prism-rhombohedron angle 90 + atan(2 c / (sqrt(3) a)) was computed from the refined cell; SD and range across entries compared with the pre-registered thresholds.";
<https://w3id.org/delphi/ontology/passCriterion> "Over all COD entries with formula O2 Si in space groups P 31 2 1 or P 32 2 1 at ambient conditions (celltemp null or 273-313 K; cellpressure null or <= 0.2 GPa), the standard deviation of the (10-10)^(10-11) interfacial angle is below 0.1 degree and the full range is below 0.5 degree: supports.";
<https://w3id.org/delphi/ontology/preregistered> "true"^^xsd:boolean .
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<https://w3id.org/delphi/ontology/EvidenceItem>;
dc:description "";
dc:license "CC0 (COD data are public domain)";
<http://www.w3.org/2000/01/rdf-schema#label> "Dataset: Crystallography Open Database (COD) search API and CIF files";
prov:atLocation <https://www.crystallography.net/cod/result?formula=O2%20Si&format=json>;
prov:wasDerivedFrom <https://www.crystallography.net/cod/>;
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sub:provenance {
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prov:SoftwareAgent;
<http://www.w3.org/2000/01/rdf-schema#label> "delphisci claim tester (claude-fable-5.1; crystals-and-form-tests-1)";
prov:actedOnBehalfOf <https://orcid.org/0009-0007-4948-9192>;
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dc:identifier "claude-fable-5.1" .
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prov:wasGeneratedBy sub:test .
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prov:wasAssociatedWith <https://w3id.org/delphi/resource/agent/delphisci-claim-tester-claude-fable-5-1> .
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sub:pubinfo {
this: dc:created "2026-11-08T16:24:31.804Z"^^xsd:dateTime;
dc:creator <https://orcid.org/0009-0007-4948-9192>;
dc:license <https://creativecommons.org/licenses/by/4.0/>;
npx:hasNanopubType <https://w3id.org/delphi/ontology/Assessment>;
npx:introduces <https://w3id.org/delphi/resource/assessment/steno1669-01--claim-test>;
<http://www.w3.org/2000/01/rdf-schema#label> "Claim test of steno1669-01: mixed, confidence 0.6";
<https://w3id.org/delphi/ontology/domain> <https://w3id.org/delphi/resource/domain/crystals-and-form> .
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