{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2000:PW2CXDTX3UD7Y2UHBIXNTFQAOP","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":"12ecfb21c38543f744861eb4426cc246d97ea9218e1c96c2116b98eb66615178","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2000-05-02T17:16:09Z","title_canon_sha256":"877b53f69561c1336dc33f377b3000e34c66fc41a8d4950753719e55999baf1f"},"schema_version":"1.0","source":{"id":"cond-mat/0005056","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0005056","created_at":"2026-05-18T01:07:13Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0005056v1","created_at":"2026-05-18T01:07:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0005056","created_at":"2026-05-18T01:07:13Z"},{"alias_kind":"pith_short_12","alias_value":"PW2CXDTX3UD7","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"PW2CXDTX3UD7Y2UH","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"PW2CXDTX","created_at":"2026-05-18T12:25:50Z"}],"graph_snapshots":[{"event_id":"sha256:f8547be831558f5137abcb67208979878074952eaaee36afa8de84db7dc80d1c","target":"graph","created_at":"2026-05-18T01:07:13Z","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":"Recent high pressure work has suggested that elemental barium forms a high pressure self-hosting structure (Ba IV) involving two `types' of barium atom. Uniquely among reported elemental structures it cannot be described by a single crystalline lattice, instead involving two interpenetrating incommensurate lattices. In this letter we report pseudopotential calculations demonstrating the stability and the potentially disordered nature of the `guest' structure. Using band structures and nearly-free electron theory we relate the appearance of Ba IV to an instability in the close-packed structure,","authors_text":"Graeme J. Ackland, Stewart K. Reed","cross_cats":[],"headline":"","license":"","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2000-05-02T17:16:09Z","title":"Theoretical and computational study of high pressure structures in barium"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0005056","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:f1d17be820f3a5dd3a83db2b04d8bada0d0e0adecfc7e2a56f02096de2956b49","target":"record","created_at":"2026-05-18T01:07:13Z","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":"12ecfb21c38543f744861eb4426cc246d97ea9218e1c96c2116b98eb66615178","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2000-05-02T17:16:09Z","title_canon_sha256":"877b53f69561c1336dc33f377b3000e34c66fc41a8d4950753719e55999baf1f"},"schema_version":"1.0","source":{"id":"cond-mat/0005056","kind":"arxiv","version":1}},"canonical_sha256":"7db42b8e77dd07fc6a870a2ed9960073dcd61f9300e26b579285f202c4dfceb1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7db42b8e77dd07fc6a870a2ed9960073dcd61f9300e26b579285f202c4dfceb1","first_computed_at":"2026-05-18T01:07:13.172943Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:07:13.172943Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hy9JOJXo8VCJYa6CE4qc7QgDAhihKFdYFNVid265kMlvSguReFG7W5P+FumziNuXOpDt4bd4vYTMM+fiQ/KhDg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:07:13.173660Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/0005056","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f1d17be820f3a5dd3a83db2b04d8bada0d0e0adecfc7e2a56f02096de2956b49","sha256:f8547be831558f5137abcb67208979878074952eaaee36afa8de84db7dc80d1c"],"state_sha256":"6ba4320097bac5018b57f9125c7813c25958022f26af80d9a9832adbb40b645d"}