Scrutinyite

scrutinyite

murdochite

plattnerite

rosasite

Images

Formula: PbO2
Simple oxide, paramorph of plattnerite
Crystal System: Orthorhombic
Specific gravity: 9.867 calculated
Streak: Dark brown
Colour: Dark reddish brown, clove-brown, red on thin edges
Luminescence: Not fluorescent under UV
Environments

Hydrothermal environments

Scrutinyite is a secondary lead oxide occurring in oxidised portions of lead-bearing deposits closely associated with plattnerite (Webmin).

Localities

At the Ojuela Mine, Mapimí, Mapimí Municipality, Durango, Mexico, scrutinyite is associated with plattnerite, rosasite and limonite. It occurs in minute quantities within plattnerite paramorphs after scrutinyite (HOM, CM 26.905-910).
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At the type lcality, the Sunshine No. 1 adit, Blanchard Mine, Bingham, Hansonburg District, Socorro County, New Mexico, USA, scrutinyite was associated with murdochite and plattnerite. The holotype specimen contains less than 1 mg of material, with crystals about 25 to 30 microns across and 1 to 2 microns thick. These flakes are red-brown and thin enough to be translucent. The mineral was deposited during oxidation-stage mineralisation on a matrix of hypogene fluorite and quartz on silicified limestone. Because the Hansonburg District produced the puest material on which virtually all of the testing was performed, and has the best documentation of location, it is selected as the type locality (CM 26.905-910).
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