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The chemical formula of mineral Carlfriesite is indicated by CaTe2TeO8. This mineral Carlfriesite is usually found occuring at cavities in an oxidized hydrothermal Au–Te deposit in intensely silicified brecciated rhyolite vitrophyre. Carlfriesite is usually found from its type of locality at Oriental (Bambollita) mine, northeast of the Moctezuma (Bambolla) mine, 12 km south of Moctezuma, Sonora, Mexico. This mineral Carlfriesite was named for Carl Fries, Jr. (1910-1965), U.S. Geological Survey and the Geological Institute of the National University, Mexico City, Mexico. Carlfriesite is 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. Mineral Carlfriesite is usually found with distinct cleavage found when evauated between crossed nicols of polarizing microscopes used in the field of optical mineralogy. Carlfriesite is usually found colored yellow in hand sample. The density measure of mineral Carlfriesite is usually founs 6.3 grams per cubic centimeters. The hardness measure of mineral Carlfriesite is usually found 3.5 when evaluated using the Mohs scale method. Carlfriesite is most commonly found leaving yellow streak when rubbed on white porcelain streak plate. Mineral Carlfriesite is commonly found showing biaxial negative figure when evaluated between crossed nicols of polarized microscope used in the field of optical mineralogy. Mineral Carlfriesite is usually found showing 0.2080 birefringence. Mineral Carlfriesite is also found not radioactive after chemical evaluations.



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Monday, May 9th, 2011 at 6:40 am
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Optical Mineralogy
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