Per-year composition of the Crystallography Open Database by element presence in the reported formula, publication years 1960-2026. Queried from the COD REST API (crystallography.net/cod/result, format=count) on 2026-08-09 UTC. Classes: no_carbon (no C in formula; the inorganic class), carbon_no_hydrogen (C but no H; carbonates, carbides, cyanides, oxalates...), carbon_and_hydrogen (C and H; organic, organometallic, MOF-like). Shares are of all COD entries with that publication year. Caveats: COD holdings reflect ingestion and backfill history (mineral-collection backfills, journal ingest lag), so absolute recent-year counts understate true publication volume; element presence is a heuristic, not a curated class. 2026 is a partial year.
| year | ch_share | no_carbon | partial_year | total_entries | no_carbon_share | carbon_no_hydrogen |
|---|---|---|---|---|---|---|
| 1960 | 0.0203 | 238 | 246 | 0.9675 | 3 | |
| 1961 | 0.0105 | 269 | 286 | 0.9406 | 14 | |
| 1962 | 0.0148 | 326 | 337 | 0.9674 | 6 | |
| 1963 | 0.0046 | 1043 | 1077 | 0.9684 | 29 | |
| 1964 | 0.0133 | 510 | 528 | 0.9659 | 11 | |
| 1965 | 0.033 | 463 | 485 | 0.9546 | 6 | |
| 1966 | 0.0307 | 423 | 456 | 0.9276 | 19 | |
| 1967 | 0.0406 | 527 | 567 | 0.9295 | 17 | |
| 1968 | 0.028 | 514 | 535 | 0.9607 | 6 | |
| 1969 | 0.0308 | 622 | 650 | 0.9569 | 8 | |
| 1970 | 0.0272 | 591 | 624 | 0.9471 | 16 | |
| 1971 | 0.0384 | 655 | 704 | 0.9304 | 22 |