Palmierite, K₂Pb(SO₄)₂, is a rare

sulfate mineral The sulfate minerals are a class of minerals that include the sulfate ion () within their structure. The sulfate minerals occur commonly in primary evaporite depositional environments, as gangue minerals in hydrothermal Vein (geology), veins and as ...

. Its presence was detected in the Voynich manuscript. It has been found in areas of volcanic activity.

References

Sulfate minerals Lead minerals {{sulfate-mineral-stub