Phyllosilicate (sheet silicate)
Specific gravity: 3.85
Colour: Colourless to white, rarely pink
Hydrothermal vein environment
Wickenburgite occurs in oxidised lead-bearing hydrothermal veins associated with
descloizite and laumontite
At the type locality, the Potter-Cramer Mine, Vulture Mining District, Maricopa county, Arizona, USA, wickenburgite occurs as an oxide zone mineral in a vein which originally carried galena and sphalerite in a gangue consisting largely of quartz and fluorite, associated with phoenicochroite and mimetite, with lesser amounts of cerussite, willemite, crocoite, duftite, hemihedrite, ajoite, vauquelinite, descloizite, laumontite and shattuckite. Wickenburgite is by far the most abundant of these minerals and was among the last to crystallise (AM53.1433).
It fluoresces best under SWUV, typically medium red, but it can also fluoresce pink, red and deep crimson, all on the same specimen. It is possible that the activator is Mn2+ with a co-activator of lead (R&M 96.1.36-37).
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