{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:RFZN2NGYUOWQEXWOCF52G55J42","short_pith_number":"pith:RFZN2NGY","schema_version":"1.0","canonical_sha256":"8972dd34d8a3ad025ece117ba377a9e69eb1b52a1cb5284f1d9c779523e9d050","source":{"kind":"arxiv","id":"1709.04094","version":1},"attestation_state":"computed","paper":{"title":"Metastable Ultracondensed Solid Hydrogenous Materials","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Cambridge MA, USA), W. J. Nellis (Harvard University","submitted_at":"2017-09-13T00:37:45Z","abstract_excerpt":"The primary purpose of this paper is to stimulate theoretical predictions of how to retain metastably hydrogenous materials made at high pressure P on release to ambient. Ultracondensed metallic hydrogen has been made at 140 GPa at finite temperatures T in the fluid. The term metallic here means quantum mechanically degenerate. A single sample of ultracondensed hydrogen has been made at an estimated pressure of 495 GPa at 5.5 K. Whether that sample is solid or fluid remains to be determined. Those results imply the long quest for metallic hydrogen is likely to be concluded in the relatively ne"},"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":"1709.04094","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2017-09-13T00:37:45Z","cross_cats_sorted":[],"title_canon_sha256":"dd7148dc1dea53ef63050dcd857d5e951b3ca68207c9d8f7b253a41350c467d9","abstract_canon_sha256":"1bdf632327bc8d6e06606be5a3651594311b0f513bb2290d3afcb1ccc4c7b7f4"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:28:44.706869Z","signature_b64":"cswG4GYXdQuFmikoJBrdyBs5caWCytrEDLHn1EMnk4aJjrcRA0P+NHoA3AHvo9hkUwiuGhadxxn2Sn+V8oyZBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8972dd34d8a3ad025ece117ba377a9e69eb1b52a1cb5284f1d9c779523e9d050","last_reissued_at":"2026-05-18T00:28:44.706104Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:28:44.706104Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Metastable Ultracondensed Solid Hydrogenous Materials","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Cambridge MA, USA), W. J. Nellis (Harvard University","submitted_at":"2017-09-13T00:37:45Z","abstract_excerpt":"The primary purpose of this paper is to stimulate theoretical predictions of how to retain metastably hydrogenous materials made at high pressure P on release to ambient. Ultracondensed metallic hydrogen has been made at 140 GPa at finite temperatures T in the fluid. The term metallic here means quantum mechanically degenerate. A single sample of ultracondensed hydrogen has been made at an estimated pressure of 495 GPa at 5.5 K. Whether that sample is solid or fluid remains to be determined. Those results imply the long quest for metallic hydrogen is likely to be concluded in the relatively ne"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1709.04094","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":"1709.04094","created_at":"2026-05-18T00:28:44.706230+00:00"},{"alias_kind":"arxiv_version","alias_value":"1709.04094v1","created_at":"2026-05-18T00:28:44.706230+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1709.04094","created_at":"2026-05-18T00:28:44.706230+00:00"},{"alias_kind":"pith_short_12","alias_value":"RFZN2NGYUOWQ","created_at":"2026-05-18T12:31:39.905425+00:00"},{"alias_kind":"pith_short_16","alias_value":"RFZN2NGYUOWQEXWO","created_at":"2026-05-18T12:31:39.905425+00:00"},{"alias_kind":"pith_short_8","alias_value":"RFZN2NGY","created_at":"2026-05-18T12:31:39.905425+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/RFZN2NGYUOWQEXWOCF52G55J42","json":"https://pith.science/pith/RFZN2NGYUOWQEXWOCF52G55J42.json","graph_json":"https://pith.science/api/pith-number/RFZN2NGYUOWQEXWOCF52G55J42/graph.json","events_json":"https://pith.science/api/pith-number/RFZN2NGYUOWQEXWOCF52G55J42/events.json","paper":"https://pith.science/paper/RFZN2NGY"},"agent_actions":{"view_html":"https://pith.science/pith/RFZN2NGYUOWQEXWOCF52G55J42","download_json":"https://pith.science/pith/RFZN2NGYUOWQEXWOCF52G55J42.json","view_paper":"https://pith.science/paper/RFZN2NGY","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1709.04094&json=true","fetch_graph":"https://pith.science/api/pith-number/RFZN2NGYUOWQEXWOCF52G55J42/graph.json","fetch_events":"https://pith.science/api/pith-number/RFZN2NGYUOWQEXWOCF52G55J42/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/RFZN2NGYUOWQEXWOCF52G55J42/action/timestamp_anchor","attest_storage":"https://pith.science/pith/RFZN2NGYUOWQEXWOCF52G55J42/action/storage_attestation","attest_author":"https://pith.science/pith/RFZN2NGYUOWQEXWOCF52G55J42/action/author_attestation","sign_citation":"https://pith.science/pith/RFZN2NGYUOWQEXWOCF52G55J42/action/citation_signature","submit_replication":"https://pith.science/pith/RFZN2NGYUOWQEXWOCF52G55J42/action/replication_record"}},"created_at":"2026-05-18T00:28:44.706230+00:00","updated_at":"2026-05-18T00:28:44.706230+00:00"}