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Aug 9

COD no-carbon intake by publisher family, 1990-2026

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Where did the structures go?
Capstone of the COD series. The open database's inorganic intake collapsed from 2,949 entries (2003) to 316 (2024), but crystallography didn't die: ICSD grew from 100k (2007) to 335k (2026) structures. Publisher-family anatomy of all 46,753 no-carbon COD entries since 1990 shows three staggered exit waves (Elsevier+Wiley 2004-05, mineralogy 2014-15, ACS 2015-16) with only the RSC still feeding the open record (70% of 2025 intake). Open capture fell from ~15% to ~2% of ICSD's annual intake.

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Per-year counts (1990-2026, 2026 partial as of 2026-08-09) of Crystallography Open Database entries whose chemical formula contains no carbon (COD REST API, nel1=C exclusion), grouped by publisher family of the source journal. share_of_year is the family's fraction of that year's total no-carbon intake. Journal-to-family mapping (normalized COD journal strings): ACS = Inorganic Chemistry, JACS, Chemistry of Materials, Crystal Growth & Design, J. Phys. Chem. C, ACS Appl. Mater. Interfaces; Elsevier = J. Solid State Chemistry, J. Alloys Compd., Solid State Sciences, Materials Research Bulletin, J. Magn. Magn. Mater., Solid State Ionics, J. Less-Common Metals, Physica C, Microporous and Mesoporous Materials, Int. J. Inorganic Materials, J. Phys. Chem. Solids, Solid State Commun., Polyhedron, Inorg. Chem. Commun., Eur. J. Solid State Inorg. Chem., Intermetallics; Wiley = Z. Anorg. Allg. Chem., Angew. Chem. Int. Ed., Chem. Eur. J., Eur. J. Inorg. Chem.; RSC = Dalton Trans., CrystEngComm, J. Mater. Chem., Chem. Commun., New J. Chem., Chem. Sci., RSC Adv.; IUCr = Acta Cryst. B/C/E, J. Appl. Cryst., IUCrJ; Mineralogy = Am. Mineral., Can. Mineral., Phys. Chem. Miner., Eur. J. Mineral., Mineral. Mag., J. Mineral. Petrol. Sci., Neues Jahrbuch Mineral., Minerals; De Gruyter = Z. Kristallogr. + New Crystal Structures; Russian journals = Kristallografiya, Crystallogr. Rep., Zh. Neorg. Khim., Zh. Strukt. Khim., Doklady, Izv. Akad. Nauk Neorg. Mater.; Physics = Phys. Rev. B, J. Phys. Condens. Matter, J. Phys. Soc. Jpn., J. Appl. Phys.; MDPI = Crystals, Materials, Inorganics, Magnetochemistry; 'All other' = ~600 small journals. Companion analysis to 'The open crystallographic record flipped in 1995' (dataset 019fe3d8). Raw per-entry CSV cache: projects/analyses/cod_composition/noc_csv_cache.jsonl.

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Where did the structures go?
Capstone of the COD series. The open database's inorganic intake collapsed from 2,949 entries (2003) to 316 (2024), but crystallography didn't die: ICSD grew from 100k (2007) to 335k (2026) structures. Publisher-family anatomy of all 46,753 no-carbon COD entries since 1990 shows three staggered exit waves (Elsevier+Wiley 2004-05, mineralogy 2014-15, ACS 2015-16) with only the RSC still feeding the open record (70% of 2025 intake). Open capture fell from ~15% to ~2% of ICSD's annual intake.