https://w3id.org/np/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU/Head https://w3id.org/np/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU http://www.nanopub.org/nschema#hasAssertion https://w3id.org/np/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU/assertion https://w3id.org/np/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU http://www.nanopub.org/nschema#hasProvenance https://w3id.org/np/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU/provenance https://w3id.org/np/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU http://www.nanopub.org/nschema#hasPublicationInfo https://w3id.org/np/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU/pubinfo https://w3id.org/np/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU http://www.w3.org/1999/02/22-rdf-syntax-ns#type http://www.nanopub.org/nschema#Nanopublication https://w3id.org/np/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU/assertion https://w3id.org/delphi/resource/assessment/bragg1915-01--claim-test http://purl.org/dc/terms/description Median cell edge a over COD entries with formula Cl Na in Fm-3m passing the ambient filter; d(200) = a/2 compared with the claimed 2.81 angstrom. https://w3id.org/delphi/resource/assessment/bragg1915-01--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/bragg1915-01--claim-test http://www.w3.org/2000/01/rdf-schema#comment Measured: 2.83175 d(200) of NaCl, median over ambient Fm-3m COD cells (angstrom) (n = 35). Interpretation: Bragg's 2.81 came from the density, the molecular weight and an estimate of the hydrogen atom's mass; the modern cell comes from diffraction against a known wavelength. The test is of the number, not the method. https://w3id.org/delphi/resource/assessment/bragg1915-01--claim-test http://www.w3.org/2000/01/rdf-schema#label Claim test of bragg1915-01: supports, confidence 0.9 https://w3id.org/delphi/resource/assessment/bragg1915-01--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/bragg1915-01/result.json https://w3id.org/delphi/resource/assessment/bragg1915-01--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/bragg1915-01--claim-test https://w3id.org/delphi/ontology/admissibleDatasets Planned datasets: cod-search-api https://w3id.org/delphi/resource/assessment/bragg1915-01--claim-test https://w3id.org/delphi/ontology/assessmentType claim-test/0.1.0 https://w3id.org/delphi/resource/assessment/bragg1915-01--claim-test https://w3id.org/delphi/ontology/dataKind physical https://w3id.org/delphi/resource/assessment/bragg1915-01--claim-test https://w3id.org/delphi/ontology/disconfirmingObservation Relative difference above 0.03: refutes. Between 0.01 and 0.03: mixed. Fewer than 3 qualifying entries: inconclusive. https://w3id.org/delphi/resource/assessment/bragg1915-01--claim-test https://w3id.org/delphi/ontology/evidenceAgainst A thermal-expansion series with empty celltemp fields inflates the median a to 5.66 angstrom (room temperature 5.640); the verdict does not depend on it. https://w3id.org/delphi/resource/assessment/bragg1915-01--claim-test https://w3id.org/delphi/ontology/expectedObservation Median a over COD entries with formula Cl Na, space group F m -3 m, ambient conditions as above, Z = 4: |2.81 - a/2| / (a/2) < 0.01: supports. https://w3id.org/delphi/resource/assessment/bragg1915-01--claim-test https://w3id.org/delphi/ontology/failCriterion Relative difference above 0.03: refutes. Between 0.01 and 0.03: mixed. Fewer than 3 qualifying entries: inconclusive. https://w3id.org/delphi/resource/assessment/bragg1915-01--claim-test https://w3id.org/delphi/ontology/hasConfidence 0.9 https://w3id.org/delphi/resource/assessment/bragg1915-01--claim-test https://w3id.org/delphi/ontology/hasEvidence https://w3id.org/delphi/resource/evidence/bragg1915-01--claim-test--dataset-1 https://w3id.org/delphi/resource/assessment/bragg1915-01--claim-test https://w3id.org/delphi/ontology/hasVerdict supports https://w3id.org/delphi/resource/assessment/bragg1915-01--claim-test https://w3id.org/delphi/ontology/hypothesis If the spacing of the cube-face planes of rock salt is 2.81 x 10^-8 cm, modern refinements of NaCl at ambient conditions give d(200) = a/2 within one per cent of 2.81 angstrom. https://w3id.org/delphi/resource/assessment/bragg1915-01--claim-test https://w3id.org/delphi/ontology/inferenceMethod Median cell edge a over COD entries with formula Cl Na in Fm-3m passing the ambient filter; d(200) = a/2 compared with the claimed 2.81 angstrom. https://w3id.org/delphi/resource/assessment/bragg1915-01--claim-test https://w3id.org/delphi/ontology/passCriterion Median a over COD entries with formula Cl Na, space group F m -3 m, ambient conditions as above, Z = 4: |2.81 - a/2| / (a/2) < 0.01: supports. https://w3id.org/delphi/resource/assessment/bragg1915-01--claim-test https://w3id.org/delphi/ontology/preregistered true https://w3id.org/delphi/resource/claim/bragg1915-01 https://w3id.org/delphi/ontology/hasAssessment https://w3id.org/delphi/resource/assessment/bragg1915-01--claim-test https://w3id.org/delphi/resource/evidence/bragg1915-01--claim-test--dataset-1 http://purl.org/dc/terms/description https://w3id.org/delphi/resource/evidence/bragg1915-01--claim-test--dataset-1 http://purl.org/dc/terms/license CC0 (COD data are public domain) https://w3id.org/delphi/resource/evidence/bragg1915-01--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/bragg1915-01--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/bragg1915-01--claim-test--dataset-1 http://www.w3.org/ns/prov#atLocation https://www.crystallography.net/cod/result?formula=Cl%20Na&format=json https://w3id.org/delphi/resource/evidence/bragg1915-01--claim-test--dataset-1 http://www.w3.org/ns/prov#wasDerivedFrom https://www.crystallography.net/cod/ https://w3id.org/delphi/resource/evidence/bragg1915-01--claim-test--dataset-1 https://w3id.org/delphi/ontology/hasChecksum sha256:8dd722386f6120e5234e7ea64cde68e5cd796094c31db425520bb93e5160b8c0 https://w3id.org/np/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU/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/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU/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/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU/assertion http://www.w3.org/ns/prov#wasDerivedFrom https://github.com/fractastical/delphisci/blob/bf2af6ee0a84e23ffa6414ad7a0a50a8c276506e/test-data/claim-tests/crystals-and-form/bragg1915-01/result.json https://w3id.org/np/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU/assertion http://www.w3.org/ns/prov#wasGeneratedBy https://w3id.org/np/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU/test https://w3id.org/np/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU/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/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU/test http://www.w3.org/1999/02/22-rdf-syntax-ns#type http://www.w3.org/ns/prov#Activity https://w3id.org/np/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU/test http://www.w3.org/ns/prov#qualifiedAssociation https://w3id.org/np/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU/plan https://w3id.org/np/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU/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/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU/pubinfo https://w3id.org/np/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU http://purl.org/dc/terms/created 2026-11-08T16:24:31.803Z https://w3id.org/np/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU http://purl.org/dc/terms/creator https://orcid.org/0009-0007-4948-9192 https://w3id.org/np/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU http://purl.org/dc/terms/license https://creativecommons.org/licenses/by/4.0/ https://w3id.org/np/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU http://purl.org/nanopub/x/hasNanopubType https://w3id.org/delphi/ontology/Assessment https://w3id.org/np/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU http://purl.org/nanopub/x/introduces https://w3id.org/delphi/resource/assessment/bragg1915-01--claim-test https://w3id.org/np/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU http://www.w3.org/2000/01/rdf-schema#label Claim test of bragg1915-01: supports, confidence 0.9 https://w3id.org/np/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU https://w3id.org/delphi/ontology/domain https://w3id.org/delphi/resource/domain/crystals-and-form https://w3id.org/np/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU/sig http://purl.org/nanopub/x/hasAlgorithm RSA https://w3id.org/np/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU/sig http://purl.org/nanopub/x/hasPublicKey MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyFHtPB6p0mCjDozxlOY9CmO3nBm7Te3jFbXyLmM+G1tGe47Da0jYIbhkl9Oo1ZjxmCa3LCwlEqK8gj6hEIcL4ahW30JXh9HycfKVk1bugkzMEV15tJdTzAU3sGMFnbNsn43xY2LFLy45tApkRm5byEiM7oRRrooIdwoQKnP4Wzq/bfAoJ9qvW+MGkelyOTd1jbSt+KfmT7xKmDfWzAHddUlWwMX2QJOLxDaffOteTop6ZRgPiNmPJKA/S62Gac9XtSYT3oDkZ6/nr5cxxNLpOyxTf5FPISiCe11xYO/unYjY+mwnOfA8yhJIyx1l0O9I0vpOpn+E5TvyHJV+oSTrvwIDAQAB https://w3id.org/np/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU/sig http://purl.org/nanopub/x/hasSignature HsvQpveflptuYvFhotgpWJeubBUxAZQiU4pdRv1qB1mZ8r4tTV1ok0565wZijyg4mruliVTweiYii+waXAQB6jwff0UctZuifQzHU96IVuZdIkyJqfQTvUl7sJowhTbnsJzGiEm59E4+0g0yv3myW3c9CHyP6oxCbLVRmp3BJmRSdmBiHWiX8Q9pfwze4CrCtmDLMItlK7qAAi/OTKY//ZSRnB8+tpsa57FCEKFMHDGrMLmKxDlPU3O/UIA3wKXD5gd6JpcZh+Uiwn1iWUdHASS0OPdevfwuCPEqaTnl9jvtYBU9fIa4AAMhutKuP7ufC+GBhEQVO3XlMz9nR7lpYg== https://w3id.org/np/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU/sig http://purl.org/nanopub/x/hasSignatureTarget https://w3id.org/np/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU https://w3id.org/np/RArhMJz7kP66x5hocprAfVPKly689N84GCN7TMYQPMmmU/sig http://purl.org/nanopub/x/signedBy https://orcid.org/0009-0007-4948-9192