{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2002:PEVQ6NSYS4X4RFUSX4QCWPU4G7","short_pith_number":"pith:PEVQ6NSY","schema_version":"1.0","canonical_sha256":"792b0f3658972fc89692bf202b3e9c37df37f09b20fe4214f95797c226005e2a","source":{"kind":"arxiv","id":"cond-mat/0210463","version":1},"attestation_state":"computed","paper":{"title":"Pressure-induced structural transitions in MgH${_2}$","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"A. Kjekshus, H. Fjellv{\\aa}g, P. Ravindran, P. Vajeeston","submitted_at":"2002-10-21T16:38:15Z","abstract_excerpt":"The stability of MgH$_2$ has been studied up to 20~GPa using density-functional total-energy calculations. At ambient pressure $\\alpha$-MgH${_2}$ takes a TiO$_2$-rutile-type structure. $\\alpha$-MgH$_2$ is predicted to transform into $\\gamma$-MgH${_2}$ at 0.39~GPa. The calculated structural data for $\\alpha$- and $\\gamma$-MgH${_2}$ are in very good agreement with experimental values. At equilibrium the energy difference between these modifications is very small, and as a result both phases coexist in a certain volume and pressure field. Above 3.84~GPa $\\gamma$-MgH${_2}$ transforms into $\\beta$-"},"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":"cond-mat/0210463","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2002-10-21T16:38:15Z","cross_cats_sorted":[],"title_canon_sha256":"67e4d939c56d3cc0dd46c2f671b03163e101354ffd8c0d1e40b10237f1b4533b","abstract_canon_sha256":"60a481fc41652bc43e83f64af763b2e713e2b4d32ee2117af7f9478618147343"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:33:14.507902Z","signature_b64":"pUlgM0JNHYgCfrPpjiKEx/KH1+DmY9itAzMJJp73qS7s4ULm/QEgYbOOyim4HWNPi1e8Ifo+7ek15e9rqQgiBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"792b0f3658972fc89692bf202b3e9c37df37f09b20fe4214f95797c226005e2a","last_reissued_at":"2026-07-04T16:33:14.507508Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:33:14.507508Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Pressure-induced structural transitions in MgH${_2}$","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"A. Kjekshus, H. Fjellv{\\aa}g, P. Ravindran, P. Vajeeston","submitted_at":"2002-10-21T16:38:15Z","abstract_excerpt":"The stability of MgH$_2$ has been studied up to 20~GPa using density-functional total-energy calculations. At ambient pressure $\\alpha$-MgH${_2}$ takes a TiO$_2$-rutile-type structure. $\\alpha$-MgH$_2$ is predicted to transform into $\\gamma$-MgH${_2}$ at 0.39~GPa. The calculated structural data for $\\alpha$- and $\\gamma$-MgH${_2}$ are in very good agreement with experimental values. At equilibrium the energy difference between these modifications is very small, and as a result both phases coexist in a certain volume and pressure field. Above 3.84~GPa $\\gamma$-MgH${_2}$ transforms into $\\beta$-"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0210463","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/cond-mat/0210463/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"cond-mat/0210463","created_at":"2026-07-04T16:33:14.507575+00:00"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0210463v1","created_at":"2026-07-04T16:33:14.507575+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0210463","created_at":"2026-07-04T16:33:14.507575+00:00"},{"alias_kind":"pith_short_12","alias_value":"PEVQ6NSYS4X4","created_at":"2026-07-04T16:33:14.507575+00:00"},{"alias_kind":"pith_short_16","alias_value":"PEVQ6NSYS4X4RFUS","created_at":"2026-07-04T16:33:14.507575+00:00"},{"alias_kind":"pith_short_8","alias_value":"PEVQ6NSY","created_at":"2026-07-04T16:33:14.507575+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/PEVQ6NSYS4X4RFUSX4QCWPU4G7","json":"https://pith.science/pith/PEVQ6NSYS4X4RFUSX4QCWPU4G7.json","graph_json":"https://pith.science/api/pith-number/PEVQ6NSYS4X4RFUSX4QCWPU4G7/graph.json","events_json":"https://pith.science/api/pith-number/PEVQ6NSYS4X4RFUSX4QCWPU4G7/events.json","paper":"https://pith.science/paper/PEVQ6NSY"},"agent_actions":{"view_html":"https://pith.science/pith/PEVQ6NSYS4X4RFUSX4QCWPU4G7","download_json":"https://pith.science/pith/PEVQ6NSYS4X4RFUSX4QCWPU4G7.json","view_paper":"https://pith.science/paper/PEVQ6NSY","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=cond-mat/0210463&json=true","fetch_graph":"https://pith.science/api/pith-number/PEVQ6NSYS4X4RFUSX4QCWPU4G7/graph.json","fetch_events":"https://pith.science/api/pith-number/PEVQ6NSYS4X4RFUSX4QCWPU4G7/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/PEVQ6NSYS4X4RFUSX4QCWPU4G7/action/timestamp_anchor","attest_storage":"https://pith.science/pith/PEVQ6NSYS4X4RFUSX4QCWPU4G7/action/storage_attestation","attest_author":"https://pith.science/pith/PEVQ6NSYS4X4RFUSX4QCWPU4G7/action/author_attestation","sign_citation":"https://pith.science/pith/PEVQ6NSYS4X4RFUSX4QCWPU4G7/action/citation_signature","submit_replication":"https://pith.science/pith/PEVQ6NSYS4X4RFUSX4QCWPU4G7/action/replication_record"}},"created_at":"2026-07-04T16:33:14.507575+00:00","updated_at":"2026-07-04T16:33:14.507575+00:00"}