{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:RTEX4XF72A2AFTVRLF2AZIJ5JX","short_pith_number":"pith:RTEX4XF7","schema_version":"1.0","canonical_sha256":"8cc97e5cbfd03402ceb159740ca13d4ddd798c61f1ec9e66febaf209ebbe3a07","source":{"kind":"arxiv","id":"1508.01772","version":1},"attestation_state":"computed","paper":{"title":"Post-stishovite transition in hydrous aluminous SiO2","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Katsuyuki Kawamura, Kei Hirose, Koichiro Umemoto, Renata M. Wentzcovitch","submitted_at":"2015-08-07T18:05:39Z","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"},"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":"1508.01772","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-08-07T18:05:39Z","cross_cats_sorted":[],"title_canon_sha256":"13cefbf433a15e5f25a58769abac768edc2f222804fab135049364f5507ec968","abstract_canon_sha256":"59fab39b70eec6b3f618d5080ceeb7d802263babfd3bbca4ee6c8393a8695e71"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:16:18.401578Z","signature_b64":"99LiXpjaVs+s/qkmEKvRGI7nQLNulgwb71Wc9SdA2bo656bhr1i1IN0AYlDRpIYaqwH375LfA+f90k/mP6B5Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8cc97e5cbfd03402ceb159740ca13d4ddd798c61f1ec9e66febaf209ebbe3a07","last_reissued_at":"2026-05-18T01:16:18.400912Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:16:18.400912Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Post-stishovite transition in hydrous aluminous SiO2","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Katsuyuki Kawamura, Kei Hirose, Koichiro Umemoto, Renata M. Wentzcovitch","submitted_at":"2015-08-07T18:05:39Z","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"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.01772","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":"1508.01772","created_at":"2026-05-18T01:16:18.401008+00:00"},{"alias_kind":"arxiv_version","alias_value":"1508.01772v1","created_at":"2026-05-18T01:16:18.401008+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.01772","created_at":"2026-05-18T01:16:18.401008+00:00"},{"alias_kind":"pith_short_12","alias_value":"RTEX4XF72A2A","created_at":"2026-05-18T12:29:39.896362+00:00"},{"alias_kind":"pith_short_16","alias_value":"RTEX4XF72A2AFTVR","created_at":"2026-05-18T12:29:39.896362+00:00"},{"alias_kind":"pith_short_8","alias_value":"RTEX4XF7","created_at":"2026-05-18T12:29:39.896362+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/RTEX4XF72A2AFTVRLF2AZIJ5JX","json":"https://pith.science/pith/RTEX4XF72A2AFTVRLF2AZIJ5JX.json","graph_json":"https://pith.science/api/pith-number/RTEX4XF72A2AFTVRLF2AZIJ5JX/graph.json","events_json":"https://pith.science/api/pith-number/RTEX4XF72A2AFTVRLF2AZIJ5JX/events.json","paper":"https://pith.science/paper/RTEX4XF7"},"agent_actions":{"view_html":"https://pith.science/pith/RTEX4XF72A2AFTVRLF2AZIJ5JX","download_json":"https://pith.science/pith/RTEX4XF72A2AFTVRLF2AZIJ5JX.json","view_paper":"https://pith.science/paper/RTEX4XF7","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1508.01772&json=true","fetch_graph":"https://pith.science/api/pith-number/RTEX4XF72A2AFTVRLF2AZIJ5JX/graph.json","fetch_events":"https://pith.science/api/pith-number/RTEX4XF72A2AFTVRLF2AZIJ5JX/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/RTEX4XF72A2AFTVRLF2AZIJ5JX/action/timestamp_anchor","attest_storage":"https://pith.science/pith/RTEX4XF72A2AFTVRLF2AZIJ5JX/action/storage_attestation","attest_author":"https://pith.science/pith/RTEX4XF72A2AFTVRLF2AZIJ5JX/action/author_attestation","sign_citation":"https://pith.science/pith/RTEX4XF72A2AFTVRLF2AZIJ5JX/action/citation_signature","submit_replication":"https://pith.science/pith/RTEX4XF72A2AFTVRLF2AZIJ5JX/action/replication_record"}},"created_at":"2026-05-18T01:16:18.401008+00:00","updated_at":"2026-05-18T01:16:18.401008+00:00"}