{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:VXPNMA6547A4D4VSBOE2MHARQF","short_pith_number":"pith:VXPNMA65","canonical_record":{"source":{"id":"1505.05301","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-05-20T09:59:03Z","cross_cats_sorted":[],"title_canon_sha256":"a15184106a63ef625b662f474bdf4f68e4ab6be38df0f5e566b88e219ef8d458","abstract_canon_sha256":"329ab7c6ad861f5699d8a3a1a7e00ff9d778baedf3a8dd3487369d1f0e26159a"},"schema_version":"1.0"},"canonical_sha256":"added603dde7c1c1f2b20b89a61c118148adac8f82b97ac7ea1e5ad0089a4cf4","source":{"kind":"arxiv","id":"1505.05301","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.05301","created_at":"2026-05-18T02:03:58Z"},{"alias_kind":"arxiv_version","alias_value":"1505.05301v1","created_at":"2026-05-18T02:03:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.05301","created_at":"2026-05-18T02:03:58Z"},{"alias_kind":"pith_short_12","alias_value":"VXPNMA6547A4","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"VXPNMA6547A4D4VS","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"VXPNMA65","created_at":"2026-05-18T12:29:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:VXPNMA6547A4D4VSBOE2MHARQF","target":"record","payload":{"canonical_record":{"source":{"id":"1505.05301","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-05-20T09:59:03Z","cross_cats_sorted":[],"title_canon_sha256":"a15184106a63ef625b662f474bdf4f68e4ab6be38df0f5e566b88e219ef8d458","abstract_canon_sha256":"329ab7c6ad861f5699d8a3a1a7e00ff9d778baedf3a8dd3487369d1f0e26159a"},"schema_version":"1.0"},"canonical_sha256":"added603dde7c1c1f2b20b89a61c118148adac8f82b97ac7ea1e5ad0089a4cf4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:03:58.743629Z","signature_b64":"bKI1KIXjQvaNQlHcOGTuu9dDsE+ZJJ5LPnQzorAXEvsKZ2Fuq/Z2mmpQypkGxH4Yv4N3y33BYJVjRVUGNUe4Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"added603dde7c1c1f2b20b89a61c118148adac8f82b97ac7ea1e5ad0089a4cf4","last_reissued_at":"2026-05-18T02:03:58.743013Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:03:58.743013Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1505.05301","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":"2026-05-18T02:03:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IyYFT3HjZ9I5yXs9lVT6Y38HJvxRXW3DA4PiMzu0Q9S3BotT5NZsWQcEpY9W5K01c/4YAfUbbXtwHYBXfMPIDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T21:17:25.851928Z"},"content_sha256":"de2a3dcbe793b0a8f52c15f7d4f86f4fdbf05f8ff8fb3e94859a4f0a18d31eb5","schema_version":"1.0","event_id":"sha256:de2a3dcbe793b0a8f52c15f7d4f86f4fdbf05f8ff8fb3e94859a4f0a18d31eb5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:VXPNMA6547A4D4VSBOE2MHARQF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Superconductivity in MgPtSi: An orthorhombic variant of MgB2","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"Hiromi Ota, Kazunori Fujimura, Kazutaka Kudo, Minoru Nohara, Seiichiro Onari","submitted_at":"2015-05-20T09:59:03Z","abstract_excerpt":"A ternary compound, MgPtSi, was synthesized by solid-state reaction. An examination of the compound by powder X-ray diffraction revealed that it crystallizes in the orthorhombic TiNiSi-type structure with the Pnma space group. The structure comprises alternately stacked layers of Mg and PtSi honeycomb network, which is reminiscent of MgB2, and the buckling of the honeycomb network causes orthorhombic distortion. Electrical and magnetic studies revealed that MgPtSi exhibited superconductivity with a transition temperature of 2.5 K. However, its isostructural compounds, namely, MgRhSi and MgIrSi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.05301","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":"2026-05-18T02:03:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GoQ8td78b/CYi58Olk18TOGDm9txo2U/BjOVaSZKkEbcwho917fHnynNC21XZk9gDWdHGSAH7AeMY23G6nVYDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T21:17:25.852660Z"},"content_sha256":"20a20a5e33e5a4858b66cb4ce1933b5ee90f4a11de5d1f849df2b15ca4d1ad34","schema_version":"1.0","event_id":"sha256:20a20a5e33e5a4858b66cb4ce1933b5ee90f4a11de5d1f849df2b15ca4d1ad34"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VXPNMA6547A4D4VSBOE2MHARQF/bundle.json","state_url":"https://pith.science/pith/VXPNMA6547A4D4VSBOE2MHARQF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VXPNMA6547A4D4VSBOE2MHARQF/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":"2026-05-27T21:17:25Z","links":{"resolver":"https://pith.science/pith/VXPNMA6547A4D4VSBOE2MHARQF","bundle":"https://pith.science/pith/VXPNMA6547A4D4VSBOE2MHARQF/bundle.json","state":"https://pith.science/pith/VXPNMA6547A4D4VSBOE2MHARQF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VXPNMA6547A4D4VSBOE2MHARQF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:VXPNMA6547A4D4VSBOE2MHARQF","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":"329ab7c6ad861f5699d8a3a1a7e00ff9d778baedf3a8dd3487369d1f0e26159a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-05-20T09:59:03Z","title_canon_sha256":"a15184106a63ef625b662f474bdf4f68e4ab6be38df0f5e566b88e219ef8d458"},"schema_version":"1.0","source":{"id":"1505.05301","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.05301","created_at":"2026-05-18T02:03:58Z"},{"alias_kind":"arxiv_version","alias_value":"1505.05301v1","created_at":"2026-05-18T02:03:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.05301","created_at":"2026-05-18T02:03:58Z"},{"alias_kind":"pith_short_12","alias_value":"VXPNMA6547A4","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"VXPNMA6547A4D4VS","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"VXPNMA65","created_at":"2026-05-18T12:29:47Z"}],"graph_snapshots":[{"event_id":"sha256:20a20a5e33e5a4858b66cb4ce1933b5ee90f4a11de5d1f849df2b15ca4d1ad34","target":"graph","created_at":"2026-05-18T02:03:58Z","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":"A ternary compound, MgPtSi, was synthesized by solid-state reaction. An examination of the compound by powder X-ray diffraction revealed that it crystallizes in the orthorhombic TiNiSi-type structure with the Pnma space group. The structure comprises alternately stacked layers of Mg and PtSi honeycomb network, which is reminiscent of MgB2, and the buckling of the honeycomb network causes orthorhombic distortion. Electrical and magnetic studies revealed that MgPtSi exhibited superconductivity with a transition temperature of 2.5 K. However, its isostructural compounds, namely, MgRhSi and MgIrSi","authors_text":"Hiromi Ota, Kazunori Fujimura, Kazutaka Kudo, Minoru Nohara, Seiichiro Onari","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-05-20T09:59:03Z","title":"Superconductivity in MgPtSi: An orthorhombic variant of MgB2"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.05301","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:de2a3dcbe793b0a8f52c15f7d4f86f4fdbf05f8ff8fb3e94859a4f0a18d31eb5","target":"record","created_at":"2026-05-18T02:03:58Z","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":"329ab7c6ad861f5699d8a3a1a7e00ff9d778baedf3a8dd3487369d1f0e26159a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-05-20T09:59:03Z","title_canon_sha256":"a15184106a63ef625b662f474bdf4f68e4ab6be38df0f5e566b88e219ef8d458"},"schema_version":"1.0","source":{"id":"1505.05301","kind":"arxiv","version":1}},"canonical_sha256":"added603dde7c1c1f2b20b89a61c118148adac8f82b97ac7ea1e5ad0089a4cf4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"added603dde7c1c1f2b20b89a61c118148adac8f82b97ac7ea1e5ad0089a4cf4","first_computed_at":"2026-05-18T02:03:58.743013Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:03:58.743013Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bKI1KIXjQvaNQlHcOGTuu9dDsE+ZJJ5LPnQzorAXEvsKZ2Fuq/Z2mmpQypkGxH4Yv4N3y33BYJVjRVUGNUe4Bw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:03:58.743629Z","signed_message":"canonical_sha256_bytes"},"source_id":"1505.05301","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:de2a3dcbe793b0a8f52c15f7d4f86f4fdbf05f8ff8fb3e94859a4f0a18d31eb5","sha256:20a20a5e33e5a4858b66cb4ce1933b5ee90f4a11de5d1f849df2b15ca4d1ad34"],"state_sha256":"140f03f0583e1ad339f5278474113d875b684e7a11cee7cb5f16649b6b5205c2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/wWUqdocgTrcUKDgfeyzwVc4rtfsGS/t1NshM/iZy0smCmSJNCENCfCK82dHB6Rf9qCGY14uaSKex/jXX4gPBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T21:17:25.856330Z","bundle_sha256":"c87b2dc8127ffd53ee01dc530a19d9d88205e78731199b4a5dcb6664933edcec"}}