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The chemical formula of the mineral Berlinite is indicated by AlPO4 or Aluminum Phosphate. Berlinte is a rhombic crystal made of sodium phosphate and aluminum salt. Mineral Berlinite is actually a Phosphate mineral. It is however considered a rare phosphate mineral. Mineral Berlinite was named in honor of Professor Nils Johan Berlin (1812-1819), a pharmacologist in the University of Lund, Sweden. Berlinite mineral was actually first discovered in the year 1868 at the Vestana Iron Mine, Nastum in Sweden. In Germany, this mineral is called as Berlinit and its Spanish name is actually known as Berlinita. Mineral Berlinite is known to crystallize in the trigonal division, which can be seen clearly visible with the aid of petrographic polarizing microscopes. Trigonal system of crystallization shows threefold symmetry on the crystal structure of mineral. It is also known to crystallize in the hexagonal system. In 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.

 

Berlinite is however considered as a not so outstanding mineral if not because of the known fact in optical mineralogy that Berlinite is the only known mineral that is isostructural with quartz. In optical mineralogy, isostructural means the two minerals have the same structure but different chemistries. Berlinite and quartz happen to have the same structure as discovered in the field of optical mineralogy researches. It has been proven true because the aluminum and phosphorus ions found in the chemical structure of Berlinite are of the same size to silicon ions of Quartz. The same structure is actually achieved since the aluminum and phosphorus ions can actually completely replace the silicon ions without alterations the structure of Quartz. Comparison of Quartz and Berlinite mineral crystals are actually fascinating. Each mineral crystal produces a very interesting and fascinating microscope images under a petrographic polarizing light microscope.

 

            Berlinite mineral specimens are commonly found colorless, or in shades of gray to pink or rose. These colored crystals are more fascinatingly wonderful when viewed with the aid of the polarized microscopes for mineralogists Berlinite is also usually commonly found exhibiting a vitreous luster when viewed in reflected light of petrographic polarizing microscopes most especially the ones used in optical mineralogy. Berlinite is commonly found with absent cleavage even if it is closely evaluated with several adjustments on the aperture diaphragm of the polarizing light microscope. Berlinite can be found showing a conchoidal fracture when it is closely evaluated under several adjustments on the aperture diaphragm of polarizing light microscopes used in optical mineralogy. Conchoidal fractures as described in optical mineralogy are developed in brittle materials that are commonly characterized by smoothly curving surfaces, which can be seen clearly exhibited when viewed with the aid of polarized microscopes. In the field of optical mineralogy, fracture describes how a mineral breaks when broken contrary to its natural cleavage planes. The specific gravity measure of Berlinite specimen usually gives an approximate value of 2.6 grams per cubic centimeters, which is commonly considered average for translucent minerals. The hardness measure of the mineral specimen Berlinite when it is evaluated using the Mohs scale method is usually found 6.5. When Berlinite specimen is rubbed on the white porcelain streak plate, it is commonly found leaving a white or gray streak.

 

            Berlinite mineral specimens are commonly found transparent to translucent in appearance. Berlinite mineral crystals are most commonly found in granular masses. It can be also found in disseminated grains, which are usually exhibiting interesting microscope images when viewed under a petrographic polarizing light microscope. Crystals of Berlinite may show a fluorescent dark red color under ultraviolet light. Mineral specimens of Berlinite are found having sub parallel twinning lamellae, that can be seen more clearly visible when the material is viewed between crossed nicols of petrographic polarizing light microscope. Berlinite is commonly found having biaxial positive figure when viewed closely with the aid of petrographic polarizing light microscope used in optical mineralogy. It commonly exhibits low surface relief when viewed under several adjustments on the aperture diaphragm of the polarizing light microscope for mineralogists. There is no specific data on the toxicity and health danger for this mineral Berlinite. However, Berlinite specimens should be treated with great care and use of sensible precaution is advised upon handling them. After several chemical evaluations Berlinite mineral is found not radioactive.

 

            The specific gravity measure of Berlinite specimen usually gives an approximate value of 2.6 grams per cubic centimeters, which is commonly considered average for translucent minerals. Berlinite is considered as a rare mineral in the high-temperature hydrothermal or metasomatic veins. There are also some reported occurrences of Berlinite mineral in vacuoles and along cracks in heavily compacted sediments. XThis Berlinite mineral notably occur at the Vestana Iron Mine, Nastum, Sweden. It can be also found at Halsjoberg, Varmland, Sweden.



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Thursday, August 28th, 2008 at 3:17 am
Category:
The Phosphates Mineral Class
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