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The chemical formula of mineral Semseyite is indicated by Pb9Sb8S21 or Lead Antimony Sulfide. Mineral Semseyite is actually a Sulfide mineral. It is most commonly used as mineral specimen and is more often found showing interesting microscope images when evaluated with the aid of petrographic polarizing light microscope used in optical mineralogy. Semseyite is also considered as a very minor ore of lead. Semseyite is most commonly found forming interesting aggregates of intergrown tabular crystals that are rather unique and interesting when evaluated with the aid of petrographic polarizing microscope for mineralogists. Semseyite was named after A. Semsey, a Hungarian mineral collector.

             Mineral Semseyite is most commonly found gray to black in color that could appear more splendidly exhibited when viewed with the aid of polarized microscopes for mineralogists. Semseyite is most commonly found showing metallic luster when viewed in reflected light of polarizing microscope used in the field of optical mineralogy. Most crystals of mineral Semseyite are found opaque in appearance. Semseyite is also known to crystallize in the monoclinic system of crystal formation. In optical mineralogy, the monoclinic system of crystal formation comprises crystals having three axes of unequal lengths. Two of which are usually found in a position that is oblique or not perpendicular to one another. However, both of which are commonly found perpendicular to the third axis. The crystal habit of mineral Semseyite as described in the field of optical mineralogy usually includes radial to spherical aggregates of tabular nearly parallel crystals that are more splendidly exhibited when viewed under polarizing microscopes used in the field of optical mineralogy. Mineral Semseyite is usually found showing perfect cleavage in several oblique directions, which can be seen more clearly visible when viewed with the aid of polarizing microscopes for mineralogists. The hardness measure of the mineral when it is evaluated using the Mohs scale method is usually found 2.5. Mineral Semseyite is most commonly found leaving a black streak when specimen sample is rubbed on a white porcelain streak plate. The specific gravity measure of the mineral when it is examined closely is found to be 5.8 to 6.1 grams per cubic centimeters, which is heavier than average for metallic minerals. Semseyite is usually found associated with other interesting minerals including pyrite, quartz, stibnite and several other rare sulfosalts. The best field indicators of mineral Semseyite usually include cleavage, crystal habit, density and associations. Semseyite has limited occurrence at its type of locality at Sprie, Maramures,, Romania. It can be also found in Scotland, France and Turkey. 



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Thursday, July 30th, 2009 at 9:08 am
Category:
The Sulfides Mineral Class
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