{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:64IVR75G3UNR4XFAQ2YSUBHWP2","short_pith_number":"pith:64IVR75G","schema_version":"1.0","canonical_sha256":"f71158ffa6dd1b1e5ca086b12a04f67ea16cd55d654ef22ab41c4330beb10de2","source":{"kind":"arxiv","id":"1711.05899","version":1},"attestation_state":"computed","paper":{"title":"Posner molecules: From atomic structure to nuclear spins","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.chem-ph","authors_text":"Chris G. Van de Walle, Matthew P. A. Fisher, Michael W. Swift","submitted_at":"2017-11-16T02:47:51Z","abstract_excerpt":"We investigate \"Posner molecules\", calcium phosphate clusters with chemical formula Ca$_9$(PO$_4$)$_6$. Originally identified in hydroxyapatite, Posner molecules have also been observed as free-floating molecules $in$ $vitro$. The formation and aggregation of Posner molecules have important implications for bone growth, and may also play a role in other biological processes such as the modulation of calcium and phosphate ion concentrations within the mitochondrial matrix. In this work, we use a first-principles computational methodology to study the structure of Posner molecules, their vibrati"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1711.05899","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2017-11-16T02:47:51Z","cross_cats_sorted":[],"title_canon_sha256":"74bd479904dc46fa84d4e9f4b176ffbac8966ddb8fe17dc8f26db4d2be5c00d1","abstract_canon_sha256":"4ccac44a139e4837bc0b6d72e630fa82609bed7dfc842b14bb8d1f7fa8f4275e"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:49:33.791357Z","signature_b64":"E+se9m79Y0M8ShgWRPjkl6zjOzrkbLphxQdR3SKwb6OiTs7MvJCrmFM8A+5UoDwdyK4jrZEChmEq93aI6fGxAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f71158ffa6dd1b1e5ca086b12a04f67ea16cd55d654ef22ab41c4330beb10de2","last_reissued_at":"2026-05-17T23:49:33.790576Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:49:33.790576Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Posner molecules: From atomic structure to nuclear spins","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.chem-ph","authors_text":"Chris G. Van de Walle, Matthew P. A. Fisher, Michael W. Swift","submitted_at":"2017-11-16T02:47:51Z","abstract_excerpt":"We investigate \"Posner molecules\", calcium phosphate clusters with chemical formula Ca$_9$(PO$_4$)$_6$. Originally identified in hydroxyapatite, Posner molecules have also been observed as free-floating molecules $in$ $vitro$. The formation and aggregation of Posner molecules have important implications for bone growth, and may also play a role in other biological processes such as the modulation of calcium and phosphate ion concentrations within the mitochondrial matrix. In this work, we use a first-principles computational methodology to study the structure of Posner molecules, their vibrati"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.05899","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1711.05899","created_at":"2026-05-17T23:49:33.790747+00:00"},{"alias_kind":"arxiv_version","alias_value":"1711.05899v1","created_at":"2026-05-17T23:49:33.790747+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.05899","created_at":"2026-05-17T23:49:33.790747+00:00"},{"alias_kind":"pith_short_12","alias_value":"64IVR75G3UNR","created_at":"2026-05-18T12:31:03.183658+00:00"},{"alias_kind":"pith_short_16","alias_value":"64IVR75G3UNR4XFA","created_at":"2026-05-18T12:31:03.183658+00:00"},{"alias_kind":"pith_short_8","alias_value":"64IVR75G","created_at":"2026-05-18T12:31:03.183658+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/64IVR75G3UNR4XFAQ2YSUBHWP2","json":"https://pith.science/pith/64IVR75G3UNR4XFAQ2YSUBHWP2.json","graph_json":"https://pith.science/api/pith-number/64IVR75G3UNR4XFAQ2YSUBHWP2/graph.json","events_json":"https://pith.science/api/pith-number/64IVR75G3UNR4XFAQ2YSUBHWP2/events.json","paper":"https://pith.science/paper/64IVR75G"},"agent_actions":{"view_html":"https://pith.science/pith/64IVR75G3UNR4XFAQ2YSUBHWP2","download_json":"https://pith.science/pith/64IVR75G3UNR4XFAQ2YSUBHWP2.json","view_paper":"https://pith.science/paper/64IVR75G","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1711.05899&json=true","fetch_graph":"https://pith.science/api/pith-number/64IVR75G3UNR4XFAQ2YSUBHWP2/graph.json","fetch_events":"https://pith.science/api/pith-number/64IVR75G3UNR4XFAQ2YSUBHWP2/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/64IVR75G3UNR4XFAQ2YSUBHWP2/action/timestamp_anchor","attest_storage":"https://pith.science/pith/64IVR75G3UNR4XFAQ2YSUBHWP2/action/storage_attestation","attest_author":"https://pith.science/pith/64IVR75G3UNR4XFAQ2YSUBHWP2/action/author_attestation","sign_citation":"https://pith.science/pith/64IVR75G3UNR4XFAQ2YSUBHWP2/action/citation_signature","submit_replication":"https://pith.science/pith/64IVR75G3UNR4XFAQ2YSUBHWP2/action/replication_record"}},"created_at":"2026-05-17T23:49:33.790747+00:00","updated_at":"2026-05-17T23:49:33.790747+00:00"}