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Plattnerite, Smithsonite
PbO2,
ZnCO3,
Locality:
Trevasco Mount, Parre, Seriana Valley, Bergamo Province, Lombardy, Italy
Field of View: 2.3 mm
Plattnerite, as red-brown tufts of acicular crystals and black thick needles, on smithsonite
Photografhed by Enrico Bonacina
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Plattnerite, Smithsonite
PbO2, ZnCO3
Locality:Trevasco Mount, Parre, Seriana Valley, Bergamo Province, Lombardy, Italy
Nice "Bob Ross hairdo" specimen on smithsonite. Tuft diameter 1,6 mm.
Photo by Enrico Bonacina
Plattnerite is an oxide mineral and is the beta crystalline form of lead dioxide (β-PbO2), scrutinyite being the other, alpha form. Plattnerite occurs in weathered hydrothermal base-metal deposits, oxidized in arid climates. It forms hay-like bundles of dark prismatic crystals with a length of a few millimeters; the bundles grow on, or sometimes within various minerals. Lead dioxide is used in lead-acid batteries and electrochemistry, but only in synthetic form – both plattnerite and scrutinyite are too rare and find no practical application.
Smithsonite occurs in a wide variety of colors. Its typical globular habit and often vibrant colors make this a desirable mineral for collectors. Smithsonite is composed of zinc carbonate, but the zinc may be partially replaced with other elements. Those elements are responsible for the color variations. For example, copper often causes green or bright blue colors, and cobalt causes a pink to purple color. Cadmium makes Smithsonite yellow, and iron gives it a brown to reddish-brown color.Smithsonite rarely occurs in visible crystals. The only two locations to produce large crystals of significance are Tsumeb, Namibia; and Broken Hill, Zambia.
Pale yellow transparent pane of wulfenite (Pb(MoO4)) surrounded by black clusters of plattnerite (PbO2). From Ojuela Mine, Mapimí, Mun. de Mapimí, Durango, Mexico
Wulfenite with Calcite, Plattnerite & Vanadinite
Wulfenite from a small find in 2014. The mine this stuff has been found is collapsed now, so there's only very limited specimens on the market. I obtained this material directly from the person who found it. This specimen is from a different kind which was rarely found there. It shows some thin, lighter colored crystals up to 2,4 cm lenght. The crystals are in a kind of vug and also have some Calcite on top. The black mineral you can see on some crystals is Plattnerite. And have you seen the Vanadinite also? These are the little red spots on photo 4, a fantastic paragenesis! The specimen is very aesthetic and 99% undamaged. Great quality, especially for it's size.
Locality: Ahmad Abad, Yazd Prov., Iran
Drusy (possibly micro-Anglesite) coated Galena cube alongside purple Fluorite octahedron with small patches of Plattnerite. Mex-Tex Mine, New Mexico
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Plattnerite with Limonite and Calcite from Greece
