{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:MAVRUFTN5KAQQSUDFMRS7PYPJN","short_pith_number":"pith:MAVRUFTN","canonical_record":{"source":{"id":"1306.0266","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-06-03T01:06:06Z","cross_cats_sorted":[],"title_canon_sha256":"7f6498876b5c62691cd82e33e3873e8bd9ef8308bc1c3f2c6045408949c15320","abstract_canon_sha256":"4ada14da9f203ce202888578ed6ac4846b6381f2e700c8193572ccb12241ef68"},"schema_version":"1.0"},"canonical_sha256":"602b1a166dea81084a832b232fbf0f4b60ee18e524fc4a09becd013576ee4f50","source":{"kind":"arxiv","id":"1306.0266","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.0266","created_at":"2026-05-18T02:39:01Z"},{"alias_kind":"arxiv_version","alias_value":"1306.0266v3","created_at":"2026-05-18T02:39:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.0266","created_at":"2026-05-18T02:39:01Z"},{"alias_kind":"pith_short_12","alias_value":"MAVRUFTN5KAQ","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_16","alias_value":"MAVRUFTN5KAQQSUD","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_8","alias_value":"MAVRUFTN","created_at":"2026-05-18T12:27:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:MAVRUFTN5KAQQSUDFMRS7PYPJN","target":"record","payload":{"canonical_record":{"source":{"id":"1306.0266","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-06-03T01:06:06Z","cross_cats_sorted":[],"title_canon_sha256":"7f6498876b5c62691cd82e33e3873e8bd9ef8308bc1c3f2c6045408949c15320","abstract_canon_sha256":"4ada14da9f203ce202888578ed6ac4846b6381f2e700c8193572ccb12241ef68"},"schema_version":"1.0"},"canonical_sha256":"602b1a166dea81084a832b232fbf0f4b60ee18e524fc4a09becd013576ee4f50","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:39:01.332589Z","signature_b64":"SxNerON/jxEWhwjnq9SWUOsZibop7RuJI9S6DqZ1070G8MmxkarYzdgAfpRSf0If5oTdTDU6sWPg7MusL949CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"602b1a166dea81084a832b232fbf0f4b60ee18e524fc4a09becd013576ee4f50","last_reissued_at":"2026-05-18T02:39:01.332023Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:39:01.332023Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1306.0266","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:39:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aIBxfc+ZFKcBFAtjaH5dIieFa/lRiUV2m+O4XlNSq9IAwwMlciAgBZX4sHrJD3Z+tJ2C9aYTFw/rYF625DPMCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T05:07:31.570628Z"},"content_sha256":"5c6851cac390d8ae318d1dbdc06378e5c14a56c732a9507cbbba7bca79bbb4c8","schema_version":"1.0","event_id":"sha256:5c6851cac390d8ae318d1dbdc06378e5c14a56c732a9507cbbba7bca79bbb4c8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:MAVRUFTN5KAQQSUDFMRS7PYPJN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Predicted alternative structure for tantalum metal under high pressure and high temperature","license":"http://creativecommons.org/licenses/by/3.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Feng Xi, Ling-Cang Cai, Xiu-Lu Zhang, Zhong-Li Liu","submitted_at":"2013-06-03T01:06:06Z","abstract_excerpt":"First-principles simulations have been performed to investigate the phase stability of tantalum metal under high pressure and high temperature (HPHT). We searched its low-energy structures globally using our developed multi-algorithm collaborative (MAC) crystal structure prediction technique. The body-centred cubic (bcc) was found to be stable at pressure up to 300 GPa. The previously reported $\\omega$ and \\textit{A}15 structures were also reproduced successfully. More interestingly, we observed another phase (space group: \\textit{Pnma}, 62) that is more stable than $\\omega$ and \\textit{A}15. "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.0266","kind":"arxiv","version":3},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:39:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1uRo8+M7wKzFtj+ghkFu1nJWodfLZSGMy/rycsqJ/gPhQwq94YJoi27q8zlfq5bKWy7VI1wiBfwJV39hfXlcBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T05:07:31.571294Z"},"content_sha256":"46b55d26143d9132ce33f79d87f2defd2d58b85f1c426285816b1003731a63fc","schema_version":"1.0","event_id":"sha256:46b55d26143d9132ce33f79d87f2defd2d58b85f1c426285816b1003731a63fc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MAVRUFTN5KAQQSUDFMRS7PYPJN/bundle.json","state_url":"https://pith.science/pith/MAVRUFTN5KAQQSUDFMRS7PYPJN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MAVRUFTN5KAQQSUDFMRS7PYPJN/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-26T05:07:31Z","links":{"resolver":"https://pith.science/pith/MAVRUFTN5KAQQSUDFMRS7PYPJN","bundle":"https://pith.science/pith/MAVRUFTN5KAQQSUDFMRS7PYPJN/bundle.json","state":"https://pith.science/pith/MAVRUFTN5KAQQSUDFMRS7PYPJN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MAVRUFTN5KAQQSUDFMRS7PYPJN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:MAVRUFTN5KAQQSUDFMRS7PYPJN","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"4ada14da9f203ce202888578ed6ac4846b6381f2e700c8193572ccb12241ef68","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-06-03T01:06:06Z","title_canon_sha256":"7f6498876b5c62691cd82e33e3873e8bd9ef8308bc1c3f2c6045408949c15320"},"schema_version":"1.0","source":{"id":"1306.0266","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.0266","created_at":"2026-05-18T02:39:01Z"},{"alias_kind":"arxiv_version","alias_value":"1306.0266v3","created_at":"2026-05-18T02:39:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.0266","created_at":"2026-05-18T02:39:01Z"},{"alias_kind":"pith_short_12","alias_value":"MAVRUFTN5KAQ","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_16","alias_value":"MAVRUFTN5KAQQSUD","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_8","alias_value":"MAVRUFTN","created_at":"2026-05-18T12:27:51Z"}],"graph_snapshots":[{"event_id":"sha256:46b55d26143d9132ce33f79d87f2defd2d58b85f1c426285816b1003731a63fc","target":"graph","created_at":"2026-05-18T02:39:01Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"First-principles simulations have been performed to investigate the phase stability of tantalum metal under high pressure and high temperature (HPHT). We searched its low-energy structures globally using our developed multi-algorithm collaborative (MAC) crystal structure prediction technique. The body-centred cubic (bcc) was found to be stable at pressure up to 300 GPa. The previously reported $\\omega$ and \\textit{A}15 structures were also reproduced successfully. More interestingly, we observed another phase (space group: \\textit{Pnma}, 62) that is more stable than $\\omega$ and \\textit{A}15. ","authors_text":"Feng Xi, Ling-Cang Cai, Xiu-Lu Zhang, Zhong-Li Liu","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-06-03T01:06:06Z","title":"Predicted alternative structure for tantalum metal under high pressure and high temperature"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.0266","kind":"arxiv","version":3},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:5c6851cac390d8ae318d1dbdc06378e5c14a56c732a9507cbbba7bca79bbb4c8","target":"record","created_at":"2026-05-18T02:39:01Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"4ada14da9f203ce202888578ed6ac4846b6381f2e700c8193572ccb12241ef68","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-06-03T01:06:06Z","title_canon_sha256":"7f6498876b5c62691cd82e33e3873e8bd9ef8308bc1c3f2c6045408949c15320"},"schema_version":"1.0","source":{"id":"1306.0266","kind":"arxiv","version":3}},"canonical_sha256":"602b1a166dea81084a832b232fbf0f4b60ee18e524fc4a09becd013576ee4f50","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"602b1a166dea81084a832b232fbf0f4b60ee18e524fc4a09becd013576ee4f50","first_computed_at":"2026-05-18T02:39:01.332023Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:39:01.332023Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SxNerON/jxEWhwjnq9SWUOsZibop7RuJI9S6DqZ1070G8MmxkarYzdgAfpRSf0If5oTdTDU6sWPg7MusL949CQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:39:01.332589Z","signed_message":"canonical_sha256_bytes"},"source_id":"1306.0266","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5c6851cac390d8ae318d1dbdc06378e5c14a56c732a9507cbbba7bca79bbb4c8","sha256:46b55d26143d9132ce33f79d87f2defd2d58b85f1c426285816b1003731a63fc"],"state_sha256":"0cc0595d23dd9711ba91e1ed8eee3377917e07fed5ed4de288714654d1e39099"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+E1lO3U8CK+JtAgIue2k1SO61rMEIY4no9mnCzpRJ1UiCn6BF/3P1AgoewSuUHGx7NYF+7hlWs9jR4eSKGYMAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T05:07:31.574763Z","bundle_sha256":"35c230bc13549092749c91790133d3f8a394b7078d53bffc7def85f8e6543588"}}