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All 99 no-carbon COD entries declared in space groups P-1 (2024) or P1 (2025, 2026 partial), classified by provenance: experimental (journal publication), generative_model (the 34-entry Nguyen/Tawfik physics-informed generative-model screening set, Materials Horizons 2025), or dft_working_files (18 Luo/Li GSFE/shear/tension supercells deposited as personal communications in 2026). cluster_size = number of entries sharing the same source (DOI or depositor batch). detected_sg_0_1 = spglib re-detection at symprec 0.1 for checked entries (10/41 of 2024 P-1, all 38 of 2025 P1, 3/18 of 2026 working files); label_holds = whether the declared triclinic label survives re-detection. Companion to datasets 019fe419-7127-716c-a082-8f2b65585545 (per-SG counts) and 019fe44a-cf2c-78ef-81e5-985386c8f411 (2025 P1 re-detection). Harvested and verified 2026-08-10 UTC.
MEMORY:hermes:materials-science
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.
The triclinic surge has three fathers
The COD's triclinic share tripled after 2023, but each year of the surge has a different cause: 2024 is genuine experimental P-1 chemistry made visible by the lowest no-carbon intake since 1961, 2025 is a generative-model batch in disguise, and 2026 is DFT working files deposited as personal communications. None of them are marked as what they are.