{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:3RCUD6R5EA26KARR6NSW5P3LT3","short_pith_number":"pith:3RCUD6R5","schema_version":"1.0","canonical_sha256":"dc4541fa3d2035e50231f3656ebf6b9ed03f5a495e407514f23974c6cfb5f878","source":{"kind":"arxiv","id":"1609.07486","version":1},"attestation_state":"computed","paper":{"title":"Hexagonal structure of phase III of solid hydrogen","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Bartomeu Monserrat, Chris J. Pickard, Eugene Gregoryanz, Richard J. Needs","submitted_at":"2016-09-23T20:00:02Z","abstract_excerpt":"A hexagonal structure of solid molecular hydrogen with $P6_122$ symmetry is calculated to be more stable below about 200 GPa than the monoclinic $C2/c$ structure identified previously as the best candidate for phase III. We find that the effects of nuclear quantum and thermal vibrations play a central role in the stabilization of $P6_122$. The $P6_122$ and $C2/c$ structures are very similar and their Raman and infra-red data are in good agreement with experiment. However, our calculations show that the hexagonal $P6_122$ structure provides better agreement with the available x-ray diffraction "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1609.07486","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-09-23T20:00:02Z","cross_cats_sorted":[],"title_canon_sha256":"57a563a80ae1982af6d050e2b58fe66b78e8d6234569df93e35b4b5c642839d5","abstract_canon_sha256":"e9b8518fb434433ec4268939e59b3474cb8461db4325dc81296fe5a93880af97"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:00:52.447043Z","signature_b64":"j8DUFRXWPE+CTnuN2Nn6keLv/MWghTWKwwBIddtGXW9ZgWuS1W/aIpuRSXw7b3/NJKe14dCtPFWkj0OjJBiaDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dc4541fa3d2035e50231f3656ebf6b9ed03f5a495e407514f23974c6cfb5f878","last_reissued_at":"2026-05-18T01:00:52.446420Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:00:52.446420Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Hexagonal structure of phase III of solid hydrogen","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Bartomeu Monserrat, Chris J. Pickard, Eugene Gregoryanz, Richard J. Needs","submitted_at":"2016-09-23T20:00:02Z","abstract_excerpt":"A hexagonal structure of solid molecular hydrogen with $P6_122$ symmetry is calculated to be more stable below about 200 GPa than the monoclinic $C2/c$ structure identified previously as the best candidate for phase III. We find that the effects of nuclear quantum and thermal vibrations play a central role in the stabilization of $P6_122$. The $P6_122$ and $C2/c$ structures are very similar and their Raman and infra-red data are in good agreement with experiment. However, our calculations show that the hexagonal $P6_122$ structure provides better agreement with the available x-ray diffraction "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.07486","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1609.07486","created_at":"2026-05-18T01:00:52.446507+00:00"},{"alias_kind":"arxiv_version","alias_value":"1609.07486v1","created_at":"2026-05-18T01:00:52.446507+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.07486","created_at":"2026-05-18T01:00:52.446507+00:00"},{"alias_kind":"pith_short_12","alias_value":"3RCUD6R5EA26","created_at":"2026-05-18T12:29:55.572404+00:00"},{"alias_kind":"pith_short_16","alias_value":"3RCUD6R5EA26KARR","created_at":"2026-05-18T12:29:55.572404+00:00"},{"alias_kind":"pith_short_8","alias_value":"3RCUD6R5","created_at":"2026-05-18T12:29:55.572404+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/3RCUD6R5EA26KARR6NSW5P3LT3","json":"https://pith.science/pith/3RCUD6R5EA26KARR6NSW5P3LT3.json","graph_json":"https://pith.science/api/pith-number/3RCUD6R5EA26KARR6NSW5P3LT3/graph.json","events_json":"https://pith.science/api/pith-number/3RCUD6R5EA26KARR6NSW5P3LT3/events.json","paper":"https://pith.science/paper/3RCUD6R5"},"agent_actions":{"view_html":"https://pith.science/pith/3RCUD6R5EA26KARR6NSW5P3LT3","download_json":"https://pith.science/pith/3RCUD6R5EA26KARR6NSW5P3LT3.json","view_paper":"https://pith.science/paper/3RCUD6R5","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1609.07486&json=true","fetch_graph":"https://pith.science/api/pith-number/3RCUD6R5EA26KARR6NSW5P3LT3/graph.json","fetch_events":"https://pith.science/api/pith-number/3RCUD6R5EA26KARR6NSW5P3LT3/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/3RCUD6R5EA26KARR6NSW5P3LT3/action/timestamp_anchor","attest_storage":"https://pith.science/pith/3RCUD6R5EA26KARR6NSW5P3LT3/action/storage_attestation","attest_author":"https://pith.science/pith/3RCUD6R5EA26KARR6NSW5P3LT3/action/author_attestation","sign_citation":"https://pith.science/pith/3RCUD6R5EA26KARR6NSW5P3LT3/action/citation_signature","submit_replication":"https://pith.science/pith/3RCUD6R5EA26KARR6NSW5P3LT3/action/replication_record"}},"created_at":"2026-05-18T01:00:52.446507+00:00","updated_at":"2026-05-18T01:00:52.446507+00:00"}