https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE/Head https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE http://www.nanopub.org/nschema#hasAssertion https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE/assertion https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE http://www.nanopub.org/nschema#hasProvenance https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE/provenance https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE http://www.nanopub.org/nschema#hasPublicationInfo https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE/pubinfo https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE http://www.w3.org/1999/02/22-rdf-syntax-ns#type http://www.nanopub.org/nschema#Nanopublication https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE/assertion https://w3id.org/delphi/resource/assessment/steno1669-01--claim-test http://purl.org/dc/terms/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. https://w3id.org/delphi/resource/assessment/steno1669-01--claim-test http://www.w3.org/1999/02/22-rdf-syntax-ns#type https://w3id.org/delphi/ontology/Assessment https://w3id.org/delphi/resource/assessment/steno1669-01--claim-test 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. 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/resource/assessment/steno1669-01--claim-test 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 https://w3id.org/delphi/resource/assessment/steno1669-01--claim-test http://www.w3.org/ns/prov#wasAttributedTo https://w3id.org/delphi/resource/agent/delphisci-claim-tester-claude-fable-5-1 https://w3id.org/delphi/resource/assessment/steno1669-01--claim-test https://w3id.org/delphi/ontology/admissibleDatasets Planned datasets: cod-search-api https://w3id.org/delphi/resource/assessment/steno1669-01--claim-test https://w3id.org/delphi/ontology/assessmentType claim-test/0.1.0 https://w3id.org/delphi/resource/assessment/steno1669-01--claim-test https://w3id.org/delphi/ontology/dataKind physical https://w3id.org/delphi/resource/assessment/steno1669-01--claim-test 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/resource/assessment/steno1669-01--claim-test 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). https://w3id.org/delphi/resource/assessment/steno1669-01--claim-test https://w3id.org/delphi/ontology/evidenceAgainst 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/resource/assessment/steno1669-01--claim-test 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/resource/assessment/steno1669-01--claim-test 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/resource/assessment/steno1669-01--claim-test https://w3id.org/delphi/ontology/hasConfidence 0.6 https://w3id.org/delphi/resource/assessment/steno1669-01--claim-test https://w3id.org/delphi/ontology/hasEvidence https://w3id.org/delphi/resource/evidence/steno1669-01--claim-test--dataset-1 https://w3id.org/delphi/resource/assessment/steno1669-01--claim-test https://w3id.org/delphi/ontology/hasVerdict mixed https://w3id.org/delphi/resource/assessment/steno1669-01--claim-test 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/resource/assessment/steno1669-01--claim-test 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/resource/assessment/steno1669-01--claim-test 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/resource/assessment/steno1669-01--claim-test https://w3id.org/delphi/ontology/preregistered true https://w3id.org/delphi/resource/claim/steno1669-01 https://w3id.org/delphi/ontology/hasAssessment https://w3id.org/delphi/resource/assessment/steno1669-01--claim-test https://w3id.org/delphi/resource/evidence/steno1669-01--claim-test--dataset-1 http://purl.org/dc/terms/description https://w3id.org/delphi/resource/evidence/steno1669-01--claim-test--dataset-1 http://purl.org/dc/terms/license CC0 (COD data are public domain) https://w3id.org/delphi/resource/evidence/steno1669-01--claim-test--dataset-1 http://www.w3.org/1999/02/22-rdf-syntax-ns#type https://w3id.org/delphi/ontology/EvidenceItem https://w3id.org/delphi/resource/evidence/steno1669-01--claim-test--dataset-1 http://www.w3.org/2000/01/rdf-schema#label Dataset: Crystallography Open Database (COD) search API and CIF files https://w3id.org/delphi/resource/evidence/steno1669-01--claim-test--dataset-1 http://www.w3.org/ns/prov#atLocation https://www.crystallography.net/cod/result?formula=O2%20Si&format=json https://w3id.org/delphi/resource/evidence/steno1669-01--claim-test--dataset-1 http://www.w3.org/ns/prov#wasDerivedFrom https://www.crystallography.net/cod/ https://w3id.org/delphi/resource/evidence/steno1669-01--claim-test--dataset-1 https://w3id.org/delphi/ontology/hasChecksum sha256:50092d0ab48f382515a0a6d57008c14b2f03aee5912f91fb0486b1a52717a651 https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE/provenance https://w3id.org/delphi/resource/agent/delphisci-claim-tester-claude-fable-5-1 http://www.w3.org/1999/02/22-rdf-syntax-ns#type http://www.w3.org/ns/prov#SoftwareAgent https://w3id.org/delphi/resource/agent/delphisci-claim-tester-claude-fable-5-1 http://www.w3.org/2000/01/rdf-schema#label delphisci claim tester (claude-fable-5.1; crystals-and-form-tests-1) https://w3id.org/delphi/resource/agent/delphisci-claim-tester-claude-fable-5-1 http://www.w3.org/ns/prov#actedOnBehalfOf https://orcid.org/0009-0007-4948-9192 https://w3id.org/delphi/resource/agent/delphisci-claim-tester-claude-fable-5-1 https://w3id.org/delphi/ontology/usesModel https://w3id.org/delphi/resource/model/claude-fable-5-1 https://w3id.org/delphi/resource/model/claude-fable-5-1 http://purl.org/dc/terms/identifier claude-fable-5.1 https://w3id.org/delphi/resource/model/claude-fable-5-1 http://www.w3.org/1999/02/22-rdf-syntax-ns#type https://w3id.org/delphi/ontology/LanguageModel https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE/assertion http://www.w3.org/ns/prov#wasAttributedTo https://w3id.org/delphi/resource/agent/delphisci-claim-tester-claude-fable-5-1 https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE/assertion http://www.w3.org/ns/prov#wasDerivedFrom https://github.com/fractastical/delphisci/blob/bf2af6ee0a84e23ffa6414ad7a0a50a8c276506e/test-data/claim-tests/crystals-and-form/steno1669-01/result.json https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE/assertion http://www.w3.org/ns/prov#wasGeneratedBy https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE/test https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE/plan http://www.w3.org/ns/prov#hadPlan https://github.com/fractastical/delphisci/blob/bf2af6ee0a84e23ffa6414ad7a0a50a8c276506e/test-data/claim-tests/README.md https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE/test http://www.w3.org/1999/02/22-rdf-syntax-ns#type http://www.w3.org/ns/prov#Activity https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE/test http://www.w3.org/ns/prov#qualifiedAssociation https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE/plan https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE/test http://www.w3.org/ns/prov#wasAssociatedWith https://w3id.org/delphi/resource/agent/delphisci-claim-tester-claude-fable-5-1 https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE/pubinfo https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE http://purl.org/dc/terms/created 2026-11-08T16:24:31.804Z https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE http://purl.org/dc/terms/creator https://orcid.org/0009-0007-4948-9192 https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE http://purl.org/dc/terms/license https://creativecommons.org/licenses/by/4.0/ https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE http://purl.org/nanopub/x/hasNanopubType https://w3id.org/delphi/ontology/Assessment https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE http://purl.org/nanopub/x/introduces https://w3id.org/delphi/resource/assessment/steno1669-01--claim-test https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE http://www.w3.org/2000/01/rdf-schema#label Claim test of steno1669-01: mixed, confidence 0.6 https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE https://w3id.org/delphi/ontology/domain https://w3id.org/delphi/resource/domain/crystals-and-form https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE/sig http://purl.org/nanopub/x/hasAlgorithm RSA https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE/sig http://purl.org/nanopub/x/hasPublicKey MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyFHtPB6p0mCjDozxlOY9CmO3nBm7Te3jFbXyLmM+G1tGe47Da0jYIbhkl9Oo1ZjxmCa3LCwlEqK8gj6hEIcL4ahW30JXh9HycfKVk1bugkzMEV15tJdTzAU3sGMFnbNsn43xY2LFLy45tApkRm5byEiM7oRRrooIdwoQKnP4Wzq/bfAoJ9qvW+MGkelyOTd1jbSt+KfmT7xKmDfWzAHddUlWwMX2QJOLxDaffOteTop6ZRgPiNmPJKA/S62Gac9XtSYT3oDkZ6/nr5cxxNLpOyxTf5FPISiCe11xYO/unYjY+mwnOfA8yhJIyx1l0O9I0vpOpn+E5TvyHJV+oSTrvwIDAQAB https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE/sig http://purl.org/nanopub/x/hasSignature KE0gEL8FJkcFnjnloGnQZjwTRAtT2qqa4Ga4X1S49eb3dvF7Rvsh1bH0dRZCFm+6AvdyHetzdJqRMAkD61M9DPmL2kANSTVKbK1vgl6dbYEaKTix8GtR2ppA2qoq9QCGujwLfnsOmB7iZA5UfWyDkTlFilMNgHLGGgllxKb6axKBYd2BM0OLCevq70kN4Slgs/vHjc1l8WhoBEoC/hfwIKIHJO9qefU9ibxzs9ZjKdSoWHjZpJzcunyr51DAxLFKZf4bP7YOLG+3ExNGJYfRXyi6PlMdODcz3zyXmSKFTE1Zssr0K+Nh83PqE+7kokHYZQHiPlVWiRrq8bu/7U68Lg== https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE/sig http://purl.org/nanopub/x/hasSignatureTarget https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE https://w3id.org/np/RAKKRJr5IuDm1YNH7gve7paHH8qPgFf4nQzlIQO8MbFoE/sig http://purl.org/nanopub/x/signedBy https://orcid.org/0009-0007-4948-9192