CMMMech
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Stolzite mineral

Stolzite is the lead tungstate mineral species Pb(WO4), listed as grandfathered in the September 2026 IMA-CNMNC list. It is distinct from elemental tungsten, wulfenite and a mixed lead-tungsten ore. Kiseleva and colleagues (2008, pages 18-21 and Figures 3-4) describe natural Mo-bearing stolzite from the Bugdaya deposit, eastern Transbaikalia, Russia. Electron-microprobe composition was reported as Pb(W0.74Mo0.26)O4; this is a W-dominant solid-solution composition, not a pure PbWO4 analysis or a distinct species named chillagite. The grains occupy fractures and cavities in galena and occur with anglesite and covellite. Small grains prevented crystal-structure investigation, so the source's assignment is retained with that limitation. Its proposed supergene origin is an interpretation of mineral associations, not a demonstrated reaction pathway. The occurrence does not establish extractable reserves or recovery yield. Microbial mechanisms and criticality designations are unrecorded.

Sources & References

  1. ima_2026_09: IMA-CNMNC. The New IMA List of Minerals, September 2026; PDF page 1 field definitions and page 206 Stolzite row: Pb(WO4), G, 1845. The year of first description is not a unique IMA approval accession.
    https://cnmnc.units.it/files/editor/IMA_Master_List_(2026-09).pdf (accessed 2026-10-14)
  2. kiseleva2008: Kiseleva GD, Kovalenker VA, Trubkin NV, Borisovsky SE and Mokhov AV (2008). Rare Minerals of In, Cd, Mo, and W in Gold-base Metal Veins of the Bugdaya Au-Mo(W)-porphyry Deposit, Eastern Transbaikalia, Russia. New Data on Minerals 43, 13-22. Stolzite arm on pages 18-21; original Figures 3-4 on pages 19-20; composition and lack of crystal-structure investigation on page 20. The distinct dzhalindite arm is already represented elsewhere in CMMMech.
    https://fmm.ru/images/9/94/NDM_2008_43_Kiseleva_eng.pdf (accessed 2026-10-14)

Curation History

Timestamp Curator Action Summary
2026-10-14T21:49:21.763721+00:00 codex (GPT-6; codex) CREATE Added primary-backed stolzite identity and natural Mo-bearing Bugdaya occurrence, retaining limited structural characterization and inferred formation.

Record source: data/records/stolzite.yaml