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in centimetres matching independent X-ray wavelength measurements—is immediately testable and confirmed across alkali halides in COD and NIST tables. https://w3id.org/delphi/resource/assessment/bragg1913s-05--gemini http://purl.org/dc/terms/subject https://w3id.org/delphi/resource/concept/dataset-resolvability-0.2.0 https://w3id.org/delphi/resource/assessment/bragg1913s-05--gemini http://www.w3.org/1999/02/22-rdf-syntax-ns#type https://w3id.org/delphi/ontology/LLMClaimAssessment https://w3id.org/delphi/resource/assessment/bragg1913s-05--gemini http://www.w3.org/2000/01/rdf-schema#comment Proposed test with existing data: For rock-salt-type alkali halides (NaCl, KCl, KBr, KI) with Z = 4 formula units per conventional FCC unit cell, compute the lattice constant in centimetres from macroscopic density rho, molar mass M, and the atomic mass unit m_u via a = (4 * M * m_u / rho)^(1/3), and compare against independent absolute X-ray interferometric and diffraction lattice constants. 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