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Click Here For Best Selection Of High Quality Polarizing Microscope

Click Here For Best Selection Of High Quality Polarizing Microscope

The chemical formula of mineral Brucite is indicated by Mg(OH)2. Brucite commonly occurs in serpentine, in chlorite or dolomitic schists, or in crystalline limestones as an alteration product of periclase. This mineral is most commonly found at its type of locality at New Jersey, USA serpentine. Brucite can be also found at Asbestos mines of Asbestos and Black Lake in Quebec, Canada. It can be also found with crystalline limestones at Crestmore, California, USA. Brucite was named after the American mineralogist, A. Bruce (1777-1818). Brucite is known to crystallize in trigonal system of crystal formation.

Brucite is commonly found with perfect cleavage in one direction when viewed closely with the aid of petrographic polarizing microscope used in the field of optical mineralogy. Brucite is most commonly found colored blue, gray, gray blue, yellow, or white in hand sample. The specific gravity measure of mineral Brucite is usually found ranging from 2.39 to 2.4 grams per cubic centimeters, giving an average of 2.39. Most crystals of mineral Brucite are found transparent in appearance. Mineral Brucite is usually found showing irregular facture with flat surfaces (not cleavage) fractured in an irregular pattern. The crystal habit of mineral Brucite is usually found forming fibrous crystals made up of fibers. Sometimes it can be found massive in form with lamellar structure or distinctly foliated fine-grained forms. It is usually found massive in form with uniformly indistinguishable crystals forming large masses. The hardness measure of mineral Brucite is usually found ranging from 2.5 to 3 when evaluated using the Mohs scale method. This mineral Brucite is found to be non-fluorescent. Brucite is commonly found exhibiting vitreous to pearly luster when viewed under polarizing microscopes. Brucite is a nonmagnetic mineral. Brucite is commonly found showing uniaxial positive figure when evaluated between crossed nicolsof polarizing microscopes. It is also commonly found showing 0.0200 birefringence. Brucite is usually found not radioactive after chemical evaluation.



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Tuesday, March 29th, 2011 at 5:35 am
Category:
Optical Mineralogy
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