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The chemical formula of mineral Bonaccordite is indicated by Ni2Fe+++BO5. This mineral is most commonly found at small tabular body of nickeliferous serpentinite, probably a contact deposit, along the junction of quartzite and an ultramafic intrusive. This mineral can possibly be found in this environment because of a nickel-rich meteorite impact. Bonaccordite is most commonly found at its type of locality at 3 km west of the Scotia talc mine, Bon Accord area, Barberton, Transvaal, South Africa. Bonaccordite was named after its locality. Mineral Bonaccordite is also known to crystallize in the orthorhombic system of crystal formation. In optical mineralogy, this orthorhombic crystal system comprises crystals having three mutually perpendicular axes, of which all are of different lengths.

            Bonaccordite is also most commonly found colored reddish brown in hand sample which can be more interesting when evaluated with the aid of petrographic polarizing microscopes for mineralogists. This mineral is also commonly found having 5.17 grams per cubic centimeters density. Most Bonaccordite crystals are found opaque in appearance. The hardness measure of mineral Bonaccordite when evaluated using the Mohs scale method is usually found 7. Bonaccordite is also commonly found exhibiting vitreous to adamantine luster when viewed in reflected light of poalrizing microscope used in the field of optical mineralogy. Mineral Bonaccordite is also most commonly found leaving a brown streak when rubbed on a white porcelain streak plate. Bonaccordite is known to be not radioactive after several chemical evaluations.



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Saturday, February 19th, 2011 at 7:51 am
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Optical Mineralogy
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