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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 the mineral Franklinite is indicated by (Zn, Fe, Mn)(Fe, Mn)2O4 or Zinc Iron Manganese. Franklinite belongs to the Oxides and Hydroxides mineral class. The mineral was first discovered in the year 1819 at the Franklin Mine in Franklin, New Jersey. Mineral Franklinite was named after Benjamin Franklin, the American statesman and the locality Franklin in New Jersey that was also named after him. Franklinite mineral is known to crystallize in the isometric system. In optical mineralogy, this isometric system comprises crystals having three axes, all of which are perpendicular to one another and all are found equal in lengths.

 

Franklinite is also most commonly considered as important ore mineral of zinc and manganese. In fact, they can be also found exhibiting interesting microscope images when viewed under an ore polarizing light microscope. Franklinite is also used mineral specimen and it is commonly found showing splendid microscope images under petrographic polarizing microscopes for mineralogists. Franklinite mineral specimens are usually found exotic and interesting when closely evaluated under polarized light microscopes used in optical mineralogy. Franklinite is truly valued by most mineral collectors because of its interesting image under geological polarizing microscopes.

 

            Franklinite is also most commonly found exhibiting a metallic luster when viewed closely in reflected light of petrographic polarizing microscopes for mineralogists. Mineral Franklinite is most commonly found exhibiting dark black color that can be more interesting when viewed with the aid of petrographic polarizing light microscope used in optical mineralogy. Franklinite can be also found showing an absent cleavage when it is closely evaluated under polarized light microscopes for geologists. Franklinite is also commonly found exhibiting a conchoidal fracture when the it is closely evaluated under several adjustments on the aperture diaphragm of the petrographic polarizing light microscopes. The specific gravity measure of the mineral is usually ranging from 5.0 gram per cubic centimeters to 5.2 grams per cubic centimeters, which is considered slightly above average for metallic minerals. The hardness measure of the mineral Franklinite when it is evaluated using the Mohs scale method is usually 6. Franklinite is commonly found leaving a reddish brown streak when it is rubbed on a white porcelain streak plate.

 

            Most Franklinite crystals are found opaque in appearance but hey can be also translucent if prepared in thin sections. The crystal habits of the mineral Franklinite as described in the field of optical mineralogy usually include octahedrons that are often found with dodecahedral faces modifying the edges of the octahedron. The modifying can actually lead to the overall rounding of the mineral crystal that can be seen visibly clear when the section is evaluated more closely with the aid of polarizing microscope used in optical mineralogy. It can be also found forming massive crystals. Franklinite mineral can be also found in granular form that is also interesting when evaluated with the aid of petrographic polarizing microscope for mineralogists. Mineral Franklinite crystals are usually brittle with a fair breakage along parting lines. Twinned crystals can be also found when the mineral is evaluated with the aid of petrographic polarizing light microscopes. Franklinite can be also found forming euhedral crystals, which occur as well-formed crystals showing good external form when viewed under petrographic polarizing microscope.

 

            . Franklinite is most commonly found exhibiting a very high surface relief, when the mineral is evaluated under several adjustments on the aperture diaphragm of the petrographic microscope. Mineral Franklinite is an isotropic mineral. In optical mineralogy, this means that the mineral section has no power to produce illumination and they consequently remain to appear dark at any viewing angle when evaluated between crossed nicols of polarized light microscopes. It shows no birefringence because isotropic minerals have no birefringenceIt exhibits white to gray color in reflected light of polarizing microscopes. Franklinite can be also found exhibiting dark red internal reflections. This mineral Franklinite is a non-fluorescent mineral. There is no specific data found on the toxicity and health dangers for mineral Franklinite. However, the specimens of this mineral should be treated with great care and use of sensible precautions is advised upon handling them. The mineral is also not radioactive.

 

            Franklinite is actually one of the minerals found at Franklin in New Jersey. This mineral site is actually considered as the world’s famous locality that has produced many exotic mineral species that were formerly unknown in the mineral world. Mineral Franklinite is usually found in large quantity and it commonly serve as an ore mineral of zinc and manganese, which are considered as the two important strategic and industrial metals. It exhibits octahedral crystals that are typically formed by the minerals belonging to spinel group. Mineral specimens from Franklin, New Jersey are often found containing the rounded black grains of mineral Franklinite surrounded by calcite of white color. Sometimes also by greenish willemite with red zincite sprinkling on it that usually produces a wonderful piece of specimen when viewed under petrographic polarizing microscopes.

 

It is commonly associated with several other interesting minerals including zincite, willemite, rhodonite, calcite and other minerals that can be found at Franklin, New Jersey. Mineral Franklinite is resembles magnetite but it can be easily distinguished from the other because Franklinite is found slightly magnetic. The best field indicators of mineral Franklinite usually include streak, crystal habit, locality and its association with other zinc minerals. Mineral Franklinite is commonly found as beds or veins produced by the metamorphism of zinc, iron and manganese rich marine carbonates. Franklinite has limited occurrence at the world’s famous mines at Franklin, New Jersey.



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Monday, September 29th, 2008 at 2:42 am
Category:
The Oxides and Hydroxides Mineral Class
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