{"paper":{"title":"Re-refinement of the structure of the planar hexagonal phase of ZnO nanocrystals","license":"http://creativecommons.org/licenses/by/4.0/","headline":"Re-refining the original diffraction data revises the lattice parameters of the planar hexagonal ZnO phase to match computational predictions.","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Jeffrey R. Reimers, Lingyao Zhang, Musen Li, Wei Ren","submitted_at":"2025-11-13T03:19:18Z","abstract_excerpt":"The planar hexagonal phase of ZnO, known as h-ZnO, g-ZnO, {\\alpha}-ZnO, the Bk structure, the 5-5 phase, the {\\alpha}-BN phase, etc., has P63/mmc symmetry and is implicated in ferroelectric switching mechanisms for wurtzite-ZnO. It is well-known in thin films on substrates and to be stabilized by external pressure, but critical is its possible existence in high-purity nanocrystals under ambient conditions. Indeed, a crystal structure has been reported, but this work remains controversial as first-principles calculations predict very different structural properties. Herein, the original experim"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"The re-refined P63/mmc structure has lattice parameters a = 3.45±0.02 Å and c = 4.46±0.02 Å at room temperature, 0.35 Å and 0.80 Å larger than previously reported and in good agreement with computational predictions.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"That the phase-shift determination combined with Morlet wavelet transformation applied to the original (unspecified) diffraction data uniquely identifies the P63/mmc structure without introducing artifacts or requiring additional constraints.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Re-refinement of h-ZnO nanocrystal data using phase-shift and Morlet wavelet methods gives room-temperature lattice parameters a = 3.45 ± 0.02 Å and c = 4.46 ± 0.02 Å, larger than prior reports and matching first-principles calculations.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Re-refining the original diffraction data revises the lattice parameters of the planar hexagonal ZnO phase to match computational predictions.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"4f49e6f32dfcdd030a53227940a2d2712f83b4b15fcdfea5ae21516f7eb10c18"},"source":{"id":"2511.09912","kind":"arxiv","version":2},"verdict":{"id":"c00dab98-607c-4e80-81b2-b5638c553cb3","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-17T23:04:03.369019Z","strongest_claim":"The re-refined P63/mmc structure has lattice parameters a = 3.45±0.02 Å and c = 4.46±0.02 Å at room temperature, 0.35 Å and 0.80 Å larger than previously reported and in good agreement with computational predictions.","one_line_summary":"Re-refinement of h-ZnO nanocrystal data using phase-shift and Morlet wavelet methods gives room-temperature lattice parameters a = 3.45 ± 0.02 Å and c = 4.46 ± 0.02 Å, larger than prior reports and matching first-principles calculations.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"That the phase-shift determination combined with Morlet wavelet transformation applied to the original (unspecified) diffraction data uniquely identifies the P63/mmc structure without introducing artifacts or requiring additional constraints.","pith_extraction_headline":"Re-refining the original diffraction data revises the lattice parameters of the planar hexagonal ZnO phase to match computational predictions."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2511.09912/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":37,"sample":[{"doi":"","year":2010,"title":"C. Lizandara Pueyo, S. Siroky, S. Landsmann, M. W . E. van den Berg, M. R. Wagner, J. S. Reparaz, A. Hoffmann, and S. Polarz, Molecular Precursor Route to a Metastable Form of Zinc Oxide, Chem. Mat., ","work_id":"f1521701-b1b3-440f-9c58-e862015570a8","ref_index":1,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2012,"title":"D. Zagorac, J. C. Schön, and M. Jansen, Energy Landscape Investigations Using the Prescribed Path Method in the ZnO System, J. Phys. Chem. C, 116, 16726 (2012). 8","work_id":"70485069-5f29-4ff1-b2a2-3c9fd8747b39","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2014,"title":"M. Schreyer, L. Guo, S. Thirunahari, F. Gao, and M. Garland, Simultaneous determination of several crystal structures from powder mixtures: the combination of powder X -ray diffraction, band- target e","work_id":"7649a4d2-5efc-4cf4-804a-4e892b472174","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2005,"title":"A. J. Kulkarni, M. Zhou, and F. J. Ke, Orientation and size dependence of the elastic properties of zinc oxide nanobelts, Nanotechnology, 16, 2749 (2005)","work_id":"1b08a94c-2ebf-4c74-ab14-9aac18d14c66","ref_index":4,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2006,"title":"A. J. Kulkarni, M. Zhou, K. Sarasamak, and S. Limpijumnong, Novel Phase Transformation in ZnO Nanowires under Tensile Loading, Phys. Rev. Lett., 97, 105502 (2006)","work_id":"23e1cb5f-3196-4b1b-926e-cf70289a525b","ref_index":5,"cited_arxiv_id":"","is_internal_anchor":false}],"resolved_work":37,"snapshot_sha256":"ef6a6edf43f8f77f1638951aa19df0ea7cd9f6921be78635f9ef6645774dd36e","internal_anchors":0},"formal_canon":{"evidence_count":1,"snapshot_sha256":"d0000a25beeee375f58df77013b425395eafdda42c6c08807c72487c75517b93"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}