{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:XDYDEJC2BFXNO362PITCBNIO27","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":"ab708503ccac362d2ac27ad07b1704b7bc4ec8df59f5ae9634a1c66a69fc8744","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-09-16T08:38:40Z","title_canon_sha256":"2d77b1129c37302b5ecf68b854ba2d9cebcd16afe3870da63ae7d092f13d9f19"},"schema_version":"1.0","source":{"id":"1509.04851","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.04851","created_at":"2026-05-18T01:29:13Z"},{"alias_kind":"arxiv_version","alias_value":"1509.04851v1","created_at":"2026-05-18T01:29:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.04851","created_at":"2026-05-18T01:29:13Z"},{"alias_kind":"pith_short_12","alias_value":"XDYDEJC2BFXN","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_16","alias_value":"XDYDEJC2BFXNO362","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_8","alias_value":"XDYDEJC2","created_at":"2026-05-18T12:29:50Z"}],"graph_snapshots":[{"event_id":"sha256:c45e4de9ee94b1ab1e948656ded17ead6bb81b58fbd95d870d80dbfc5a1241f6","target":"graph","created_at":"2026-05-18T01:29:13Z","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":"Tetragonal beta-FeSe obtained by hydrothermal reaction is not superconducting and transforms to a triclinic structure at 60 K unlike superconducting FeSe from solid state synthesis, which becomes orthorhombic at 90 K. In contrast, tetragonal iron sulphide FeS from hydrothermal synthesis is superconducting at 4.8 K but undergoes no structural transition. Our results suggest that the absence of superconductivity in hydrothermally synthesized FeSe may be associated to the low-temperature structure with zigzag chains of iron atoms, which is different from the known orthorhombic Cmme structure of s","authors_text":"Dirk Johrendt, Natalie Fehn, Ursula Pachmayr","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-09-16T08:38:40Z","title":"Structural transition and superconductivity in hydrothermally synthesized FeX (X = S, Se)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.04851","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":"sha256:9ba3120470da963526b8d856a1f7861c3a816fbd046521198e1085efc2e85e04","target":"record","created_at":"2026-05-18T01:29:13Z","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":"ab708503ccac362d2ac27ad07b1704b7bc4ec8df59f5ae9634a1c66a69fc8744","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-09-16T08:38:40Z","title_canon_sha256":"2d77b1129c37302b5ecf68b854ba2d9cebcd16afe3870da63ae7d092f13d9f19"},"schema_version":"1.0","source":{"id":"1509.04851","kind":"arxiv","version":1}},"canonical_sha256":"b8f032245a096ed76fda7a2620b50ed7dfec4aa6946ea578a04043f41c1e02af","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b8f032245a096ed76fda7a2620b50ed7dfec4aa6946ea578a04043f41c1e02af","first_computed_at":"2026-05-18T01:29:13.109150Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:29:13.109150Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+zgOS1w3eTNwiFfEi9WqhXgstg82cAuC5E/mRwSahtqpIw9gmPBIg9Z2h4v3dXd5uyAvlGrXcvi2ZOywqCEqCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:29:13.109929Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.04851","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9ba3120470da963526b8d856a1f7861c3a816fbd046521198e1085efc2e85e04","sha256:c45e4de9ee94b1ab1e948656ded17ead6bb81b58fbd95d870d80dbfc5a1241f6"],"state_sha256":"294ad86c64866f8529f587b4bb4502b1a87f28fbbb7852500f257976db0df20c"}