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Click Here For Best Selection Of High Quality Polarizing Microscope

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The chemical formula of mineral Burbankite is indicated by (Na,Ca)3(Sr,Ba,Ce)3(CO3)5 or Sodium Calcium Strontium Barium Cerium Carbonate. Burbankite is actually a Carbonate mineral. The chemical composition of Burbankite mineral is commonly considered unusual. This is because it is enriched in rare elements such as strontium, cerium and barium. Cerium is actually one of the most important rare earth metals, which are considered very important to the industry. Burbankite mineral is also closely related to the mineral called carbocernaite. Both Burbankite and carbocernaite are considered important in the development of the rare earth minerals, which are commonly formed in carbonatite rocks and they are actually being studied for this reason. Some pseudomorphs of Burbankite and Carbocernaite minerals are actually found formed by several other rare earth minerals. Mineral specimen Burbankite was actually named after W.S. Burbank, an American geologist. It was actually first discovered in the year 1953 at Bearpaw Mountains at Hill Co., Montana in the United States. Burbankite minerals are commonly associated with several other interesting minerals such as calcite, ilmenite, pyrite, biotite, albite, paranatrolite, rutile, donnayite, astrophyllite, analcime, aegirine and many others. There has been a new mineral species to science, which was once thought to be as Burbankite. This new species actually has slightly different chemistry, with different symmetry and is usually found having pseudohexagonal monoclinic crystals. This mineral species was identified to be remondite.

 

            Burbankite mineral is a rare strontium and cerium carbonate mineral, which is considerably rare in occurrence. Burbankite is actually one of the many rare minerals that come from Mont Saint-Hilaire, Quebec, Canada, which is one of the famous mineral localities. Some Burbankite mineral specimens from this locality have been cut for gemstone purposes. This cut Burbankite stones are actually found displaying nice and brilliant image under a gemological microscope. The North American record holder for Burbankite mineral species is the large 6.62-carat orange stone, which is commonly found exhibiting a splendid microscope image under a polarizing microscopes used in optical mineralogy. But since Burbankite minerals are considered extremely rare, they are also far too rare to be considered as a mainstream gemstone. The crystal habit of Burbankite mineral is very similar to that of the Apatite. But the two minerals are actually different in terms of their color and size. Burbankite mineral crystals are typically small but they are commonly found as well-formed crystals and they certainly make good micro mounts and commonly show marvelous microscope views under a polarizing light microscope for mineralogists.

 

            Burbankite minerals are commonly found in shades of pale orange, pale yellow, white, beige and sometimes colorless with some color zoning found when specimens are evaluated in transmitted light of petrographic polarizing microscope used in optical mineralogy. They are commonly found exhibiting vitreous to dull or silky luster in reflected light of polarized microscopes for mineralogists. The cleavage that is usually displayed by Burbankite mineral specimen when it is evaluated between crossed nicols of polarizing light microscope in optical mineralogy is commonly distinct to imperfect in six directions. They are usually found prismatic. The dominant faces in prismatic crystals, which are clearly visible with the aid of a polarizing microscope used in the field of optical mineralogy, are that of the prism. Burbankite mineral is also found having an uneven fracture that is seen clearly under several adjustments on the aperture diaphragm of the petrographic polarizing microscope for mineralogists. The hardness measure of Burbankite mineral when specimen is evaluated using the Mohs scale method is commonly found ranging from 3.5 to 4. When mineral specimens of Burbankite are rubbed on a white porcelain streak plate, they are usually found leaving a white streak. The specific gravity measure for mineral Burbankite is commonly found as 3.5 grams per cubic centimeters, which is commonly considered as an above average value.  

 

            Mineral Burbankite is known to crystallize in the hexagonal system of crystal formation. In the field of optical mineralogy, the hexagonal system of crystallization comprises crystals having four axes. Three of which are positioned in a single plane with equal length and are symmetrically spaced. The fourth axis is found to be perpendicular to the other three axes. Burbankite mineral crystals are commonly found transparent to translucent appearance. The crystal habit of Burbankite as described in optical mineralogy usually includes small prismatic crystals, which are commonly found as six and twelve sided crystals with pyramidal or pinacoidal terminations. They can be also found as compact spherical aggregates and fibrous masses, which are found exhibiting nice and interesting microscope views under a polarizing light microscope for mineralogists.

 

Burbankite minerals are actually uniaxial figure, which is clearly visible under petrographic polarizing microscope used in optical mineralogy. Some Burbankite mineral specimens have been known to fluoresce. Rarely, they can be also found exhibiting an unusual change in color, which from green in daylight to brown in incandescent light. The index of refraction displayed by Burbankite is commonly found ranging from 1.615 to 1.627. The maximum birefringence is commonly found as 1.615. Burbankite mineral is commonly found displaying a moderate surface relief under polarizing light microscope used in optical mineralogy. There is no specific data on the toxicity and health danger for mineral Burbankite. However, Burbankite mineral specimen should be treated with great care and use of sensible precaution is advised upon handling. The best field indicators of Burbankite minerals usually include color, crystal habit, luster and its splendid and interesting association with several other minerals. Burbankite minerals have limited occurrence at some types of localities that include some areas in Canada such as Mont Saint Hilaire in Quebec and the Chapman Lake in Ontario. They also notably occur at Khibina, Kola Peninsula in Russia as well as the Vermiculite Prospects, Big Sandy Creek Hill County in Montana, USA. 



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Friday, January 15th, 2010 at 4:58 am
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The Carbonates and Borates Mineral Class
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