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Lorenzenite mineral

Lorenzenite is the sodium titanium silicate mineral with ideal formula Na2Ti2O3(Si2O6), equivalent to Na2Ti2Si2O9. The September 2026 IMA-CNMNC list gives grandfathered status G and original description year 1901, not an IMA approval number. Ramsayite is a historical name for the same species, not a separate material owner. Sundberg, Lehtinen and Kivekas (1987) refined a natural crystal from Helsinki museum specimen 4937, labelled from Lovozero on the Kola Peninsula. Their Pbcn model contains pyroxene-type silicate chains, distorted TiO6 octahedra and seven-coordinate sodium. The single-crystal refinement used 778 selected reflections from 1167 measured independent reflections and reported R=0.026. The chemistry cited for that specimen was from earlier work, not a new bulk assay in 1987. Historical cell-setting and oxygen-coordinate discrepancies are discussed in the original study. This identity record does not assert a dissolution, synthesis or microbial mechanism, a recovery yield, industrial use or criticality inherited from titanium.

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Sources & References

  1. ima_2026_09: IMA-CNMNC. The New IMA List of Minerals, September 2026. Lorenzenite row PDF page 128; grandfathered-status and year definitions page 1. Current official landing page and dated PDF checked.
    https://cnmnc.units.it/files/editor/IMA_Master_List_(2026-09).pdf (accessed 2026-10-16)
  2. sundberg1987: Sundberg MR, Lehtinen M, Kivekas R (1987). Refinement of the crystal structure of ramsayite (lorenzenite). American Mineralogist 72:173-177. Complete five-page original: specimen and methods pp. 173-174; Tables 1, 3, 5 and 6 pp. 174-175; structural Figures 1-2 p. 176. Deposited powder lines and structure factors are separately identified as AM-87-325.
    https://msaweb.org/AmMin/AM72/AM72_173.pdf (accessed 2026-10-16)

Curation History

Timestamp Curator Action Summary
2026-10-16T09:23:40Z codex (GPT-6; codex) CREATE Create distinct lorenzenite species with natural-crystal identity and structural evidence.
2026-10-22T13:21:23Z claude (claude-opus-4-6; antigravity) EDIT Normalize IMA-CNMNC Master List source id from ima202609 to canonical ima_2026_09 (Issue #817).

Record source: data/records/lorenzenite.yaml