{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:UTIUPW3DG4L5WO6QWJGBTYIOXK","short_pith_number":"pith:UTIUPW3D","canonical_record":{"source":{"id":"1010.1487","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2010-10-07T17:11:48Z","cross_cats_sorted":["cond-mat.mtrl-sci","physics.comp-ph"],"title_canon_sha256":"052172bc1b4f7bde8ead9e2f7a0a08a0b247bbafe8b8e9c0c45b1d9fdf702fd4","abstract_canon_sha256":"19d35c120d5c27557ad4c668799fb64a8fa6db0f563c61e9485d88e220f7395f"},"schema_version":"1.0"},"canonical_sha256":"a4d147db633717db3bd0b24c19e10ebaad42c54041b77687ab8189cebae31d0c","source":{"kind":"arxiv","id":"1010.1487","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1010.1487","created_at":"2026-05-18T04:39:40Z"},{"alias_kind":"arxiv_version","alias_value":"1010.1487v1","created_at":"2026-05-18T04:39:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1010.1487","created_at":"2026-05-18T04:39:40Z"},{"alias_kind":"pith_short_12","alias_value":"UTIUPW3DG4L5","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_16","alias_value":"UTIUPW3DG4L5WO6Q","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_8","alias_value":"UTIUPW3D","created_at":"2026-05-18T12:26:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:UTIUPW3DG4L5WO6QWJGBTYIOXK","target":"record","payload":{"canonical_record":{"source":{"id":"1010.1487","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2010-10-07T17:11:48Z","cross_cats_sorted":["cond-mat.mtrl-sci","physics.comp-ph"],"title_canon_sha256":"052172bc1b4f7bde8ead9e2f7a0a08a0b247bbafe8b8e9c0c45b1d9fdf702fd4","abstract_canon_sha256":"19d35c120d5c27557ad4c668799fb64a8fa6db0f563c61e9485d88e220f7395f"},"schema_version":"1.0"},"canonical_sha256":"a4d147db633717db3bd0b24c19e10ebaad42c54041b77687ab8189cebae31d0c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:39:40.981800Z","signature_b64":"jPkhJY3Xrw4MjlRmFtHc+S9+iJdVmU0MEF1CWs3Yb+7Y1bzUOf065LcVQi5mx6cOkWBZDdhuTkCsrTucTjRWAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a4d147db633717db3bd0b24c19e10ebaad42c54041b77687ab8189cebae31d0c","last_reissued_at":"2026-05-18T04:39:40.981154Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:39:40.981154Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1010.1487","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":"2026-05-18T04:39:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"C0e8oQsl5TsTahxxtM/VzsgFrkh897lsxUZG0BZS3TRGB2lFS2UEGPR6DXhtW9z/OiMU/rgNgE/sSIWeGAAFDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T02:32:30.817949Z"},"content_sha256":"0d62e6fc768547e2ef24277a570304a1ecef3ed32f06792eeeeecda501d03b91","schema_version":"1.0","event_id":"sha256:0d62e6fc768547e2ef24277a570304a1ecef3ed32f06792eeeeecda501d03b91"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:UTIUPW3DG4L5WO6QWJGBTYIOXK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Structure and binding in crystals of cage-like molecules: hexamine and platonic hydrocarbons","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci","physics.comp-ph"],"primary_cat":"physics.chem-ph","authors_text":"Kristian Berland, Per Hyldgaard","submitted_at":"2010-10-07T17:11:48Z","abstract_excerpt":"In this paper, we show that first-principle calculations using a van der Waals density functional (vdW-DF), [Phys. Rev. Lett. $\\mathbf{92}$, 246401 (2004)] permits determination of molecular crystal structure. We study the crystal structures of hexamine and the platonic hydrocarbons (cubane and dodecahedrane). The calculated lattice parameters and cohesion energy agree well with experiments. Further, we examine the asymptotic accounts of the van der Waals forces by comparing full vdW-DF with asymptotic atom-based pair potentials extracted from vdW-DF. The character of the binding differ in the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1010.1487","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":"2026-05-18T04:39:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gDwLAckMMu61As0uHScX6MphNtz4Wgy1PHJhIPaoflkCXY9iXirA/iE6ftvWDOA2S3kCjYOBAI5h1CRQsXhUDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T02:32:30.818306Z"},"content_sha256":"b66b804e88be084e5ea4639e8624919cc83cc67867528300dde760dc258c921f","schema_version":"1.0","event_id":"sha256:b66b804e88be084e5ea4639e8624919cc83cc67867528300dde760dc258c921f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UTIUPW3DG4L5WO6QWJGBTYIOXK/bundle.json","state_url":"https://pith.science/pith/UTIUPW3DG4L5WO6QWJGBTYIOXK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UTIUPW3DG4L5WO6QWJGBTYIOXK/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":"2026-05-28T02:32:30Z","links":{"resolver":"https://pith.science/pith/UTIUPW3DG4L5WO6QWJGBTYIOXK","bundle":"https://pith.science/pith/UTIUPW3DG4L5WO6QWJGBTYIOXK/bundle.json","state":"https://pith.science/pith/UTIUPW3DG4L5WO6QWJGBTYIOXK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UTIUPW3DG4L5WO6QWJGBTYIOXK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:UTIUPW3DG4L5WO6QWJGBTYIOXK","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":"19d35c120d5c27557ad4c668799fb64a8fa6db0f563c61e9485d88e220f7395f","cross_cats_sorted":["cond-mat.mtrl-sci","physics.comp-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2010-10-07T17:11:48Z","title_canon_sha256":"052172bc1b4f7bde8ead9e2f7a0a08a0b247bbafe8b8e9c0c45b1d9fdf702fd4"},"schema_version":"1.0","source":{"id":"1010.1487","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1010.1487","created_at":"2026-05-18T04:39:40Z"},{"alias_kind":"arxiv_version","alias_value":"1010.1487v1","created_at":"2026-05-18T04:39:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1010.1487","created_at":"2026-05-18T04:39:40Z"},{"alias_kind":"pith_short_12","alias_value":"UTIUPW3DG4L5","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_16","alias_value":"UTIUPW3DG4L5WO6Q","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_8","alias_value":"UTIUPW3D","created_at":"2026-05-18T12:26:15Z"}],"graph_snapshots":[{"event_id":"sha256:b66b804e88be084e5ea4639e8624919cc83cc67867528300dde760dc258c921f","target":"graph","created_at":"2026-05-18T04:39:40Z","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":"In this paper, we show that first-principle calculations using a van der Waals density functional (vdW-DF), [Phys. Rev. Lett. $\\mathbf{92}$, 246401 (2004)] permits determination of molecular crystal structure. We study the crystal structures of hexamine and the platonic hydrocarbons (cubane and dodecahedrane). The calculated lattice parameters and cohesion energy agree well with experiments. Further, we examine the asymptotic accounts of the van der Waals forces by comparing full vdW-DF with asymptotic atom-based pair potentials extracted from vdW-DF. The character of the binding differ in the","authors_text":"Kristian Berland, Per Hyldgaard","cross_cats":["cond-mat.mtrl-sci","physics.comp-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2010-10-07T17:11:48Z","title":"Structure and binding in crystals of cage-like molecules: hexamine and platonic hydrocarbons"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1010.1487","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":"sha256:0d62e6fc768547e2ef24277a570304a1ecef3ed32f06792eeeeecda501d03b91","target":"record","created_at":"2026-05-18T04:39:40Z","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":"19d35c120d5c27557ad4c668799fb64a8fa6db0f563c61e9485d88e220f7395f","cross_cats_sorted":["cond-mat.mtrl-sci","physics.comp-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2010-10-07T17:11:48Z","title_canon_sha256":"052172bc1b4f7bde8ead9e2f7a0a08a0b247bbafe8b8e9c0c45b1d9fdf702fd4"},"schema_version":"1.0","source":{"id":"1010.1487","kind":"arxiv","version":1}},"canonical_sha256":"a4d147db633717db3bd0b24c19e10ebaad42c54041b77687ab8189cebae31d0c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a4d147db633717db3bd0b24c19e10ebaad42c54041b77687ab8189cebae31d0c","first_computed_at":"2026-05-18T04:39:40.981154Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:39:40.981154Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jPkhJY3Xrw4MjlRmFtHc+S9+iJdVmU0MEF1CWs3Yb+7Y1bzUOf065LcVQi5mx6cOkWBZDdhuTkCsrTucTjRWAg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:39:40.981800Z","signed_message":"canonical_sha256_bytes"},"source_id":"1010.1487","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0d62e6fc768547e2ef24277a570304a1ecef3ed32f06792eeeeecda501d03b91","sha256:b66b804e88be084e5ea4639e8624919cc83cc67867528300dde760dc258c921f"],"state_sha256":"2290fb3a8bbc670e50fbe3f0c27e969aa94f4914f4da5b2bcbdef866c75d6523"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UgadXfDMHRHFSr6W2b+MtZUKnlWMkFcUrKsWNm45q867dxYgbUEiLmKgBsMFP6aJm/Jwg00osArKb1MqkFH2Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T02:32:30.820340Z","bundle_sha256":"e757b38435d3fa2902f04c074836ee1016948ecc76eb85b8613860596ae95f45"}}