{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:RN2HDEAVJ6H2ETY6ZRVEFIXLWT","short_pith_number":"pith:RN2HDEAV","canonical_record":{"source":{"id":"1810.08766","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-10-20T07:34:30Z","cross_cats_sorted":[],"title_canon_sha256":"5f875ce61ee54b94d322617b5be2d9d7ae064a64fa53c45e90b7981cc4686712","abstract_canon_sha256":"25be52313a7da39a3879e08365994ee860de6fce13b533096a1dd88ab7004e0a"},"schema_version":"1.0"},"canonical_sha256":"8b747190154f8fa24f1ecc6a42a2ebb4e766795979ffdfac4cf8e3636eba2fe1","source":{"kind":"arxiv","id":"1810.08766","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.08766","created_at":"2026-05-18T00:02:41Z"},{"alias_kind":"arxiv_version","alias_value":"1810.08766v1","created_at":"2026-05-18T00:02:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.08766","created_at":"2026-05-18T00:02:41Z"},{"alias_kind":"pith_short_12","alias_value":"RN2HDEAVJ6H2","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"RN2HDEAVJ6H2ETY6","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"RN2HDEAV","created_at":"2026-05-18T12:32:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:RN2HDEAVJ6H2ETY6ZRVEFIXLWT","target":"record","payload":{"canonical_record":{"source":{"id":"1810.08766","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-10-20T07:34:30Z","cross_cats_sorted":[],"title_canon_sha256":"5f875ce61ee54b94d322617b5be2d9d7ae064a64fa53c45e90b7981cc4686712","abstract_canon_sha256":"25be52313a7da39a3879e08365994ee860de6fce13b533096a1dd88ab7004e0a"},"schema_version":"1.0"},"canonical_sha256":"8b747190154f8fa24f1ecc6a42a2ebb4e766795979ffdfac4cf8e3636eba2fe1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:02:41.959007Z","signature_b64":"g9rOSBMlAzbwdrzj3IGupYu4QnK+6F5v8Kec/UzvPf6TPD/wHi6fIxgaFmNJPHCjKM7QGd2V+iPwPdQufGpsBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8b747190154f8fa24f1ecc6a42a2ebb4e766795979ffdfac4cf8e3636eba2fe1","last_reissued_at":"2026-05-18T00:02:41.958435Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:02:41.958435Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1810.08766","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":"2026-05-18T00:02:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YITwunhpZ80UdZLIagByGkXOY9fKWCXq8n+WWuvJSWf40yv99wNoVgrf/Eq7FVCtI3YmvkFF/fkObZEYik8UBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-21T20:33:21.311089Z"},"content_sha256":"ced06544b680b9f9c258fe3463827ad0f6d96c5f28f6fe81932259b7c17f996b","schema_version":"1.0","event_id":"sha256:ced06544b680b9f9c258fe3463827ad0f6d96c5f28f6fe81932259b7c17f996b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:RN2HDEAVJ6H2ETY6ZRVEFIXLWT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Superionic hydrogen in Earth's deep interior","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Chris J. Pickard, Duck Young Kim, Ho-kwang Mao, Qingyang Hu, Richard J. Needs, Yu He","submitted_at":"2018-10-20T07:34:30Z","abstract_excerpt":"Superionic hydrogen was previously thought to be an exotic state predicted and confirmed only in pure H2O ice. In Earth's deep interior, H2O exists in the form of O-H groups in ultra-dense hydrous minerals, which have been proved to be stable even at the conditions of the core-mantle boundary (CMB). However, the superionic states of these hydrous minerals at high P-T have not been investigated. Using first-principles calculations, we found that pyrite structured FeO2Hx (0 <= x <= 1) and d-AlOOH, which have been proposed to be major hydrogen-bearing phases in the deep lower mantle (DLM), contai"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.08766","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:02:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wZ2lEPb7RRzA+Ys6/pnXcU6cSP2avE3Ya2rF1i3UXbkJkI3TvxkhuC8VyfUywh/crWiGYFpxh+y1LJbXpYcBAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-21T20:33:21.311442Z"},"content_sha256":"d0484c861cdbc2cc9649be7d413ae68e8652d2ac29c6b3f9a81a7d3f1e4bff5f","schema_version":"1.0","event_id":"sha256:d0484c861cdbc2cc9649be7d413ae68e8652d2ac29c6b3f9a81a7d3f1e4bff5f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RN2HDEAVJ6H2ETY6ZRVEFIXLWT/bundle.json","state_url":"https://pith.science/pith/RN2HDEAVJ6H2ETY6ZRVEFIXLWT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RN2HDEAVJ6H2ETY6ZRVEFIXLWT/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":"2026-06-21T20:33:21Z","links":{"resolver":"https://pith.science/pith/RN2HDEAVJ6H2ETY6ZRVEFIXLWT","bundle":"https://pith.science/pith/RN2HDEAVJ6H2ETY6ZRVEFIXLWT/bundle.json","state":"https://pith.science/pith/RN2HDEAVJ6H2ETY6ZRVEFIXLWT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RN2HDEAVJ6H2ETY6ZRVEFIXLWT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:RN2HDEAVJ6H2ETY6ZRVEFIXLWT","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":"25be52313a7da39a3879e08365994ee860de6fce13b533096a1dd88ab7004e0a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-10-20T07:34:30Z","title_canon_sha256":"5f875ce61ee54b94d322617b5be2d9d7ae064a64fa53c45e90b7981cc4686712"},"schema_version":"1.0","source":{"id":"1810.08766","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.08766","created_at":"2026-05-18T00:02:41Z"},{"alias_kind":"arxiv_version","alias_value":"1810.08766v1","created_at":"2026-05-18T00:02:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.08766","created_at":"2026-05-18T00:02:41Z"},{"alias_kind":"pith_short_12","alias_value":"RN2HDEAVJ6H2","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"RN2HDEAVJ6H2ETY6","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"RN2HDEAV","created_at":"2026-05-18T12:32:50Z"}],"graph_snapshots":[{"event_id":"sha256:d0484c861cdbc2cc9649be7d413ae68e8652d2ac29c6b3f9a81a7d3f1e4bff5f","target":"graph","created_at":"2026-05-18T00:02:41Z","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":"Superionic hydrogen was previously thought to be an exotic state predicted and confirmed only in pure H2O ice. In Earth's deep interior, H2O exists in the form of O-H groups in ultra-dense hydrous minerals, which have been proved to be stable even at the conditions of the core-mantle boundary (CMB). However, the superionic states of these hydrous minerals at high P-T have not been investigated. Using first-principles calculations, we found that pyrite structured FeO2Hx (0 <= x <= 1) and d-AlOOH, which have been proposed to be major hydrogen-bearing phases in the deep lower mantle (DLM), contai","authors_text":"Chris J. Pickard, Duck Young Kim, Ho-kwang Mao, Qingyang Hu, Richard J. Needs, Yu He","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-10-20T07:34:30Z","title":"Superionic hydrogen in Earth's deep interior"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.08766","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:ced06544b680b9f9c258fe3463827ad0f6d96c5f28f6fe81932259b7c17f996b","target":"record","created_at":"2026-05-18T00:02:41Z","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":"25be52313a7da39a3879e08365994ee860de6fce13b533096a1dd88ab7004e0a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-10-20T07:34:30Z","title_canon_sha256":"5f875ce61ee54b94d322617b5be2d9d7ae064a64fa53c45e90b7981cc4686712"},"schema_version":"1.0","source":{"id":"1810.08766","kind":"arxiv","version":1}},"canonical_sha256":"8b747190154f8fa24f1ecc6a42a2ebb4e766795979ffdfac4cf8e3636eba2fe1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8b747190154f8fa24f1ecc6a42a2ebb4e766795979ffdfac4cf8e3636eba2fe1","first_computed_at":"2026-05-18T00:02:41.958435Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:02:41.958435Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"g9rOSBMlAzbwdrzj3IGupYu4QnK+6F5v8Kec/UzvPf6TPD/wHi6fIxgaFmNJPHCjKM7QGd2V+iPwPdQufGpsBw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:02:41.959007Z","signed_message":"canonical_sha256_bytes"},"source_id":"1810.08766","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ced06544b680b9f9c258fe3463827ad0f6d96c5f28f6fe81932259b7c17f996b","sha256:d0484c861cdbc2cc9649be7d413ae68e8652d2ac29c6b3f9a81a7d3f1e4bff5f"],"state_sha256":"bcfebe6be576bf672f2d0d05003e68f3f80fd77634c259f093822f30ddd87138"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lULqhFk7kYXCcpRtgMljqzbcPQPWTjLWbrxvrb2l6QhkfQUddaoda5J0KuKX7EsWcRUEhPXziCfhetLiL6CZCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-21T20:33:21.313310Z","bundle_sha256":"5407b1a6a46305fdc5e846cfaa665685bcdd7bf949396ca68d2008fe32fd86aa"}}