Palmierite

Palmierite, K2Pb(SO4)2, is a rare sulfate mineral.[1] Its presence was detected in the Voynich manuscript.[2] It has been found in areas of volcanic activity.

References
  1. https://www.dakotamatrix.com/mineralpedia/7511/palmierite
  2. Barabe, Joseph G. (April 1, 2009). "Materials analysis of the Voynich Manuscript" (PDF). Beinecke Library (McCrone Associates). Archived from the original (PDF) on March 4, 2016. Retrieved June 8, 2016.CS1 maint: ref=harv (link)
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