{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:RTEX4XF72A2AFTVRLF2AZIJ5JX","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":"59fab39b70eec6b3f618d5080ceeb7d802263babfd3bbca4ee6c8393a8695e71","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-08-07T18:05:39Z","title_canon_sha256":"13cefbf433a15e5f25a58769abac768edc2f222804fab135049364f5507ec968"},"schema_version":"1.0","source":{"id":"1508.01772","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.01772","created_at":"2026-05-18T01:16:18Z"},{"alias_kind":"arxiv_version","alias_value":"1508.01772v1","created_at":"2026-05-18T01:16:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.01772","created_at":"2026-05-18T01:16:18Z"},{"alias_kind":"pith_short_12","alias_value":"RTEX4XF72A2A","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_16","alias_value":"RTEX4XF72A2AFTVR","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_8","alias_value":"RTEX4XF7","created_at":"2026-05-18T12:29:39Z"}],"graph_snapshots":[{"event_id":"sha256:2715b53198dcb42a8aeff3e481eb9320062181bb8f7165d50b2b0862e56a3cdf","target":"graph","created_at":"2026-05-18T01:16:18Z","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":"Lakshtanov et al. (2007) showed that incorporation of aluminum and some water into SiO2 significantly reduces the post-stishovite transition pressure in SiO2. This discovery suggested that the ferroelastic post-stishovite transition in subducted MORB crust could be the source of reflectors/scatterers with low shear velocities observed in the mid to upper lower mantle. A few years later, a similar effect was observed in anhydrous Al-bearing silica. In this paper, we show using first principles static calculations and molecular dynamics using inter-atomic potentials that hydrogen bonds and hydro","authors_text":"Katsuyuki Kawamura, Kei Hirose, Koichiro Umemoto, Renata M. Wentzcovitch","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-08-07T18:05:39Z","title":"Post-stishovite transition in hydrous aluminous SiO2"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.01772","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":"sha256:279fa9f47569e917fb1b18d0e4bdc04bd97b5dd0a12e759c2eaf160a52aee4ee","target":"record","created_at":"2026-05-18T01:16:18Z","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":"59fab39b70eec6b3f618d5080ceeb7d802263babfd3bbca4ee6c8393a8695e71","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-08-07T18:05:39Z","title_canon_sha256":"13cefbf433a15e5f25a58769abac768edc2f222804fab135049364f5507ec968"},"schema_version":"1.0","source":{"id":"1508.01772","kind":"arxiv","version":1}},"canonical_sha256":"8cc97e5cbfd03402ceb159740ca13d4ddd798c61f1ec9e66febaf209ebbe3a07","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8cc97e5cbfd03402ceb159740ca13d4ddd798c61f1ec9e66febaf209ebbe3a07","first_computed_at":"2026-05-18T01:16:18.400912Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:16:18.400912Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"99LiXpjaVs+s/qkmEKvRGI7nQLNulgwb71Wc9SdA2bo656bhr1i1IN0AYlDRpIYaqwH375LfA+f90k/mP6B5Cw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:16:18.401578Z","signed_message":"canonical_sha256_bytes"},"source_id":"1508.01772","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:279fa9f47569e917fb1b18d0e4bdc04bd97b5dd0a12e759c2eaf160a52aee4ee","sha256:2715b53198dcb42a8aeff3e481eb9320062181bb8f7165d50b2b0862e56a3cdf"],"state_sha256":"a2a6114cab28284ad79b8b5889b5c8ced495355979167da20dd8ddc284158eb5"}