{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T05:42:17Z","timestamp":1791438137486,"version":"4.3.3"},"reference-count":79,"publisher":"American Association for the Advancement of Science (AAAS)","issue":"19","funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["T2425016"],"award-info":[{"award-number":["T2425016"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["T2225027"],"award-info":[{"award-number":["T2225027"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"HPSTAR","award":["2301-0237"],"award-info":[{"award-number":["2301-0237"]}]}],"content-domain":{"domain":["www.science.org"],"crossmark-restriction":true},"short-container-title":["Sci. Adv."],"published-print":{"date-parts":[[2026,5,8]]},"abstract":"<jats:p>\n                    Recent astronomical observations show that carbon dioxide (CO\n                    <jats:sub>2<\/jats:sub>\n                    ) is widespread on planetary bodies, often coexisting with water (H\n                    <jats:sub>2<\/jats:sub>\n                    O). Crystalline carbonic acid (H\n                    <jats:sub>2<\/jats:sub>\n                    CO\n                    <jats:sub>3<\/jats:sub>\n                    ), produced from CO\n                    <jats:sub>2<\/jats:sub>\n                    -H\n                    <jats:sub>2<\/jats:sub>\n                    O interactions, has been predicted and synthesized under high pressure, yet their dynamic behaviors under planetary interior conditions remain poorly understood. Here, we investigate the stability of CO\n                    <jats:sub>2<\/jats:sub>\n                    -H\n                    <jats:sub>2<\/jats:sub>\n                    O planetary ices across pressures from 0 to 500 gigapascals. Our simulations demonstrate that H\n                    <jats:sub>2<\/jats:sub>\n                    CO\n                    <jats:sub>3<\/jats:sub>\n                    and orthocarbonic acid (H\n                    <jats:sub>4<\/jats:sub>\n                    CO\n                    <jats:sub>4<\/jats:sub>\n                    ) become dominant C\u2500O\u2500H compounds and evolve from molecular crystals into three-dimensional solids with increasing pressures. Particularly, both carbonic acids transform into a H-diffusive superionic phase and subsequently a C\u2500H doubly superionic conduit enabled by interconnected oxygen polyhedral voids, where correlated motions between ions enhance the ionic conductivities. Moreover, the hydrogen in H\n                    <jats:sub>2<\/jats:sub>\n                    CO\n                    <jats:sub>3<\/jats:sub>\n                    exhibits strong anisotropic behaviors that may contribute to the nonaxisymmetric magnetic fields of ice giants. These findings further suggest that carbonic acid ices could sustain hydrogen-carbon transport, potentially enhancing convective volatile cycling in giant planet interiors.\n                  <\/jats:p>","DOI":"10.1126\/sciadv.aeb9271","type":"journal-article","created":{"date-parts":[[2026,5,12]],"date-time":"2026-05-12T09:53:19Z","timestamp":1778579599000},"update-policy":"https:\/\/doi.org\/10.34133\/aaas_crossmark","source":"Crossref","is-referenced-by-count":2,"title":["Hydrogen-carbon doubly superionic conduits of carbonic acids in planetary ices"],"prefix":"10.1126","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2420-8079","authenticated-orcid":true,"given":"Jun","family":"Deng","sequence":"first","affiliation":[{"name":"Center for High Pressure Science and Technology Advanced Research, Beijing 100193, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2612-4314","authenticated-orcid":true,"given":"Huiyang","family":"Gou","sequence":"additional","affiliation":[{"name":"Center for High Pressure Science and Technology Advanced Research, Beijing 100193, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2742-3017","authenticated-orcid":true,"given":"Qingyang","family":"Hu","sequence":"additional","affiliation":[{"name":"Center for High Pressure Science and Technology Advanced Research, Beijing 100193, China."}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"221","reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.3847\/1538-4357\/acb49a"},{"key":"e_1_3_2_3_2","doi-asserted-by":"publisher","DOI":"10.1038\/s43247-023-00741-5"},{"key":"e_1_3_2_4_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.283.5398.44"},{"key":"e_1_3_2_5_2","doi-asserted-by":"publisher","DOI":"10.1038\/s41567-019-0568-7"},{"key":"e_1_3_2_6_2","first-page":"021007","article-title":"Plastic and superionic helium ammonia compounds under high pressure and high temperature","volume":"10","author":"Liu C.","year":"2020","unstructured":"C. Liu, H. Gao, A. Hermann, Y. Wang, M. Miao, C. J. Pickard, R. J. Needs, H.-T. Wang, D. Xing, J. Sun, Plastic and superionic helium ammonia compounds under high pressure and high temperature. Phys. Rev. X 10, 021007 (2020).","journal-title":"Phys. Rev. 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