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The chemical formula of Nickel is indicated by Ni or Elemental Nickel. This Nickel belongs to the Elemental minerals. Nickel is most commonly used as mineral specimen as well as in scientific studies. Nickel is also extremely rare in nature. It is almost always alloyed with iron. Iron meteorites, for instance, are typically 6 percent to 20 percent nickel. In 1967 native nickel was identified in samples from Bogata in New Caledonia. It forms in serpentized ultramafic rocks low temperature hydrothermal activity. It has since been identified from a number of other locations, including meteor strikes.

 

            Nickel is most commonly bluish white in color when viewed with the aid of polarized light microscope used in the field of optical mineralogy. Nickel is also usually found showing metallic luster when viewed in reflected light of polarized microscopes for mineralogists. Nickel specimen samples are usually found opaque in appearance. Nickel is known to crystallize in the isometric system of crystal formation. In optical mineralogy, this isometric crystal system comprises crystals having three axes, all of which are perpendicular to one another and all are found equal in lengths. The crystal habit of Nickel as described in optical mineralogy includes crystal forms that are extremely rare. Nickel is commonly found in cubic form but it is generally granular or massive.

 

            Nickel has absent cleavage even when viewed closely with the aid of petrographic polarizing light microscopes for mineralogists. It is also usually found showing hackly fracture when viewed under polarized light microscopes used in optical mineralogy. Nickel is most commonly found leaving gray metallic streak when rubbed on a white porcelain streak plate. The hardness measure of Nickel when it is evaluated using the Mohs scale method is usually ranging from 4 to 5. The specific gravity measure of Nickel is usually found ranging from 7.8 grams per cubic centimeters to 8.2 grams per cubic centimeters, which is heavy even for metallic minerals. Nickel is malleable but mildly attracted to magnets. The best field indicators of Nickel include environment, malleability, and weak attraction to magnet. Nickel is most commonly found associated with other interesting minerals such as olivine, pyroxenes, and some minerals that are only found in meteorites. In terrestrial samples it is found with gold and platinum and with sulfides ores. Nickel notably occurs in New Caledonia, Meteor Crater, Arizona and San Diego County California, USA.



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Friday, May 15th, 2009 at 3:19 am
Category:
The Native Elements Mineral Class
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