{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:NIJAI5TXG7Y3EAPWSIBU4YHOS6","short_pith_number":"pith:NIJAI5TX","schema_version":"1.0","canonical_sha256":"6a1204767737f1b201f692034e60ee978b6e870c59b74dc4e358a5de35a19017","source":{"kind":"arxiv","id":"1804.05109","version":1},"attestation_state":"computed","paper":{"title":"Experimental evidence of a body centered cubic iron at the Earth's core condition","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"physics.geo-ph","authors_text":"Carnegie Institution of Washington), Geophysical Laboratory, Guoyin Shen (1) ((1) High Pressure Collaborative Access Team (HPCAT), Rostislav Hrubiak (1), Yue Meng (1)","submitted_at":"2018-04-13T20:22:21Z","abstract_excerpt":"The crystal structure of iron in the Earth's inner core remains debated. Most recent experiments suggest a hexagonal-close-packed (hcp) phase. In simulations, it has been generally agreed that the hcp-Fe is stable at inner core pressures and relatively low temperatures. At high temperatures, however, several studies suggest a body-centered-cubic (bcc) phase at the inner core condition. We have examined the crystal structure of iron at high pressures over 2 million atmospheres (>200GPa) and at high temperatures over 5000 kelvin in a laser-heated diamond cell using microstructure analysis combin"},"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":"1804.05109","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2018-04-13T20:22:21Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"e9b94db0c5dbaef066530d15a920d8f62893ec5c9629d40ad9755cde9463837f","abstract_canon_sha256":"289cbe17e0a56a54d767b65039ca191a64411ce87db7b145cd0aa165e52519eb"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:18:30.524633Z","signature_b64":"ToUAraL+q+uGAFCPUk4rhxvWOwTpvARglH6MSmupL8gav6htnVKe2sCntvxxHmDLhXuP8HrVWfRnOroIFdMuBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6a1204767737f1b201f692034e60ee978b6e870c59b74dc4e358a5de35a19017","last_reissued_at":"2026-05-18T00:18:30.524262Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:18:30.524262Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Experimental evidence of a body centered cubic iron at the Earth's core condition","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"physics.geo-ph","authors_text":"Carnegie Institution of Washington), Geophysical Laboratory, Guoyin Shen (1) ((1) High Pressure Collaborative Access Team (HPCAT), Rostislav Hrubiak (1), Yue Meng (1)","submitted_at":"2018-04-13T20:22:21Z","abstract_excerpt":"The crystal structure of iron in the Earth's inner core remains debated. Most recent experiments suggest a hexagonal-close-packed (hcp) phase. In simulations, it has been generally agreed that the hcp-Fe is stable at inner core pressures and relatively low temperatures. At high temperatures, however, several studies suggest a body-centered-cubic (bcc) phase at the inner core condition. We have examined the crystal structure of iron at high pressures over 2 million atmospheres (>200GPa) and at high temperatures over 5000 kelvin in a laser-heated diamond cell using microstructure analysis combin"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.05109","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":"1804.05109","created_at":"2026-05-18T00:18:30.524331+00:00"},{"alias_kind":"arxiv_version","alias_value":"1804.05109v1","created_at":"2026-05-18T00:18:30.524331+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.05109","created_at":"2026-05-18T00:18:30.524331+00:00"},{"alias_kind":"pith_short_12","alias_value":"NIJAI5TXG7Y3","created_at":"2026-05-18T12:32:40.477152+00:00"},{"alias_kind":"pith_short_16","alias_value":"NIJAI5TXG7Y3EAPW","created_at":"2026-05-18T12:32:40.477152+00:00"},{"alias_kind":"pith_short_8","alias_value":"NIJAI5TX","created_at":"2026-05-18T12:32:40.477152+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/NIJAI5TXG7Y3EAPWSIBU4YHOS6","json":"https://pith.science/pith/NIJAI5TXG7Y3EAPWSIBU4YHOS6.json","graph_json":"https://pith.science/api/pith-number/NIJAI5TXG7Y3EAPWSIBU4YHOS6/graph.json","events_json":"https://pith.science/api/pith-number/NIJAI5TXG7Y3EAPWSIBU4YHOS6/events.json","paper":"https://pith.science/paper/NIJAI5TX"},"agent_actions":{"view_html":"https://pith.science/pith/NIJAI5TXG7Y3EAPWSIBU4YHOS6","download_json":"https://pith.science/pith/NIJAI5TXG7Y3EAPWSIBU4YHOS6.json","view_paper":"https://pith.science/paper/NIJAI5TX","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1804.05109&json=true","fetch_graph":"https://pith.science/api/pith-number/NIJAI5TXG7Y3EAPWSIBU4YHOS6/graph.json","fetch_events":"https://pith.science/api/pith-number/NIJAI5TXG7Y3EAPWSIBU4YHOS6/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/NIJAI5TXG7Y3EAPWSIBU4YHOS6/action/timestamp_anchor","attest_storage":"https://pith.science/pith/NIJAI5TXG7Y3EAPWSIBU4YHOS6/action/storage_attestation","attest_author":"https://pith.science/pith/NIJAI5TXG7Y3EAPWSIBU4YHOS6/action/author_attestation","sign_citation":"https://pith.science/pith/NIJAI5TXG7Y3EAPWSIBU4YHOS6/action/citation_signature","submit_replication":"https://pith.science/pith/NIJAI5TXG7Y3EAPWSIBU4YHOS6/action/replication_record"}},"created_at":"2026-05-18T00:18:30.524331+00:00","updated_at":"2026-05-18T00:18:30.524331+00:00"}