{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:VQMFZFQ4MFHTVXTGBEVICIJNXP","short_pith_number":"pith:VQMFZFQ4","canonical_record":{"source":{"id":"2205.14997","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2022-05-30T11:13:56Z","cross_cats_sorted":[],"title_canon_sha256":"3a37f129844c596d67437b1ef6771fb3870c8933890e91e9b632316eb26eac63","abstract_canon_sha256":"d1c0e0b4ffdb52990cac0f7cb331b8793a0417f64cc75da16aa0632f72b3e08c"},"schema_version":"1.0"},"canonical_sha256":"ac185c961c614f3ade66092a81212dbbc872138feb9c353bf58322e8ddb9265a","source":{"kind":"arxiv","id":"2205.14997","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2205.14997","created_at":"2026-07-05T05:11:22Z"},{"alias_kind":"arxiv_version","alias_value":"2205.14997v1","created_at":"2026-07-05T05:11:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2205.14997","created_at":"2026-07-05T05:11:22Z"},{"alias_kind":"pith_short_12","alias_value":"VQMFZFQ4MFHT","created_at":"2026-07-05T05:11:22Z"},{"alias_kind":"pith_short_16","alias_value":"VQMFZFQ4MFHTVXTG","created_at":"2026-07-05T05:11:22Z"},{"alias_kind":"pith_short_8","alias_value":"VQMFZFQ4","created_at":"2026-07-05T05:11:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:VQMFZFQ4MFHTVXTGBEVICIJNXP","target":"record","payload":{"canonical_record":{"source":{"id":"2205.14997","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2022-05-30T11:13:56Z","cross_cats_sorted":[],"title_canon_sha256":"3a37f129844c596d67437b1ef6771fb3870c8933890e91e9b632316eb26eac63","abstract_canon_sha256":"d1c0e0b4ffdb52990cac0f7cb331b8793a0417f64cc75da16aa0632f72b3e08c"},"schema_version":"1.0"},"canonical_sha256":"ac185c961c614f3ade66092a81212dbbc872138feb9c353bf58322e8ddb9265a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:11:22.294727Z","signature_b64":"HWUZSJdHg4lH4bRUpjNXys+EQL4YbnDu5505So+Uw/u15wL0hxMzab5wxQvbD0bkX5QNG6GP6f/VHzFfbHeyAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ac185c961c614f3ade66092a81212dbbc872138feb9c353bf58322e8ddb9265a","last_reissued_at":"2026-07-05T05:11:22.294248Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:11:22.294248Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2205.14997","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T05:11:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Tx1dHfgF0MDku4LATv0rjG8ieT0yMgnlXmMUWDTugSl7BOFR+46j+/I/T1kC+kBpaiHg6kh5CgBsL051C8t9BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T14:36:53.004286Z"},"content_sha256":"d2dd2ee8aed24c5789ef90ca29831a1454ff42c3783ab376d5028cc07517ec89","schema_version":"1.0","event_id":"sha256:d2dd2ee8aed24c5789ef90ca29831a1454ff42c3783ab376d5028cc07517ec89"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:VQMFZFQ4MFHTVXTGBEVICIJNXP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Stable compounds in the CaO-Al2O3 system at high pressures","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Artem R. Oganov, Efim A. Mazhnik, Ekaterina I. Marchenko, Nikolay N. Eremin","submitted_at":"2022-05-30T11:13:56Z","abstract_excerpt":"Using evolutionary crystal structure prediction algorithm USPEX, we showed that at pressures of the Earth's lower mantle CaAl2O4 is the only stable calcium aluminate. At pressures above 7.0 GPa it has the CaFe2O4-type structure and space group Pnma. This phase is one of prime candidate aluminous phases in the lower mantle of the Earth. We show that at low pressures 5CaO * 3Al2O3 (C5A3) with space group Cmc21, CaAl4O7 (C2/c) and CaAl2O4 (P21/m) structures are stable at pressures of up to 2.1, 1.8 and 7.0 GPa respectively. The previously unknown structure of the orthorhombic 'CA-III' phase is al"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2205.14997","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/2205.14997/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T05:11:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"znWV3ftP5K9H8TF3/Y52mMXdXQ9erHQkqOqbO/F5kPm3mrQlOpryecQMPursv3s8PXo4/jX5S4Es437DSWYrBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T14:36:53.005253Z"},"content_sha256":"dd2506f47abbe64f5e109fed16a24718d6bf8ed100d2305914158374a78a8dcf","schema_version":"1.0","event_id":"sha256:dd2506f47abbe64f5e109fed16a24718d6bf8ed100d2305914158374a78a8dcf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VQMFZFQ4MFHTVXTGBEVICIJNXP/bundle.json","state_url":"https://pith.science/pith/VQMFZFQ4MFHTVXTGBEVICIJNXP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VQMFZFQ4MFHTVXTGBEVICIJNXP/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":"2026-08-15T14:36:53Z","links":{"resolver":"https://pith.science/pith/VQMFZFQ4MFHTVXTGBEVICIJNXP","bundle":"https://pith.science/pith/VQMFZFQ4MFHTVXTGBEVICIJNXP/bundle.json","state":"https://pith.science/pith/VQMFZFQ4MFHTVXTGBEVICIJNXP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VQMFZFQ4MFHTVXTGBEVICIJNXP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:VQMFZFQ4MFHTVXTGBEVICIJNXP","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":"d1c0e0b4ffdb52990cac0f7cb331b8793a0417f64cc75da16aa0632f72b3e08c","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2022-05-30T11:13:56Z","title_canon_sha256":"3a37f129844c596d67437b1ef6771fb3870c8933890e91e9b632316eb26eac63"},"schema_version":"1.0","source":{"id":"2205.14997","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2205.14997","created_at":"2026-07-05T05:11:22Z"},{"alias_kind":"arxiv_version","alias_value":"2205.14997v1","created_at":"2026-07-05T05:11:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2205.14997","created_at":"2026-07-05T05:11:22Z"},{"alias_kind":"pith_short_12","alias_value":"VQMFZFQ4MFHT","created_at":"2026-07-05T05:11:22Z"},{"alias_kind":"pith_short_16","alias_value":"VQMFZFQ4MFHTVXTG","created_at":"2026-07-05T05:11:22Z"},{"alias_kind":"pith_short_8","alias_value":"VQMFZFQ4","created_at":"2026-07-05T05:11:22Z"}],"graph_snapshots":[{"event_id":"sha256:dd2506f47abbe64f5e109fed16a24718d6bf8ed100d2305914158374a78a8dcf","target":"graph","created_at":"2026-07-05T05:11:22Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2205.14997/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Using evolutionary crystal structure prediction algorithm USPEX, we showed that at pressures of the Earth's lower mantle CaAl2O4 is the only stable calcium aluminate. At pressures above 7.0 GPa it has the CaFe2O4-type structure and space group Pnma. This phase is one of prime candidate aluminous phases in the lower mantle of the Earth. We show that at low pressures 5CaO * 3Al2O3 (C5A3) with space group Cmc21, CaAl4O7 (C2/c) and CaAl2O4 (P21/m) structures are stable at pressures of up to 2.1, 1.8 and 7.0 GPa respectively. The previously unknown structure of the orthorhombic 'CA-III' phase is al","authors_text":"Artem R. Oganov, Efim A. Mazhnik, Ekaterina I. Marchenko, Nikolay N. Eremin","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2022-05-30T11:13:56Z","title":"Stable compounds in the CaO-Al2O3 system at high pressures"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2205.14997","kind":"arxiv","version":1},"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:d2dd2ee8aed24c5789ef90ca29831a1454ff42c3783ab376d5028cc07517ec89","target":"record","created_at":"2026-07-05T05:11:22Z","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":"d1c0e0b4ffdb52990cac0f7cb331b8793a0417f64cc75da16aa0632f72b3e08c","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2022-05-30T11:13:56Z","title_canon_sha256":"3a37f129844c596d67437b1ef6771fb3870c8933890e91e9b632316eb26eac63"},"schema_version":"1.0","source":{"id":"2205.14997","kind":"arxiv","version":1}},"canonical_sha256":"ac185c961c614f3ade66092a81212dbbc872138feb9c353bf58322e8ddb9265a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ac185c961c614f3ade66092a81212dbbc872138feb9c353bf58322e8ddb9265a","first_computed_at":"2026-07-05T05:11:22.294248Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:11:22.294248Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HWUZSJdHg4lH4bRUpjNXys+EQL4YbnDu5505So+Uw/u15wL0hxMzab5wxQvbD0bkX5QNG6GP6f/VHzFfbHeyAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T05:11:22.294727Z","signed_message":"canonical_sha256_bytes"},"source_id":"2205.14997","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d2dd2ee8aed24c5789ef90ca29831a1454ff42c3783ab376d5028cc07517ec89","sha256:dd2506f47abbe64f5e109fed16a24718d6bf8ed100d2305914158374a78a8dcf"],"state_sha256":"11fbef231fece076653795a81951d5929d4aae27f1f6733bdb293a932869f937"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vLsi+Dyaqc1QZqM0biQw09X8mdnjP/C7VJRHVg7yKy79MSoziVTDY3QxeCBsVUU0USAfqUPO6lw1JLEMJBrCCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-15T14:36:53.011370Z","bundle_sha256":"0b5128c1f77196844b668bf648660d6d750771fd8d303b23c5d30203d33c1353"}}