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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 principle anions of the Halides group of minerals are called halogens. These halogens are considered as special group of elements. Halogens are usually found having negative one charge when combined chemically. These halogens are found most commonly in nature including Iodine, Chlorine, Bromine, and Fluorine. Halide minerals are typically found having rather simply ordered structures and therefore of a high degree of symmetry that can be noticed more clearly when the specimen is evaluated closely under petrographic polarizing light microscopes. The most famous and well-known Halide mineral is Halite. The chemical composition of Halite is indicated by the formula NaCl. Another term for this is rock salt. Halite is known to have the highest symmetry of 4/m bar 3 2/m. The colorful mineral Fluorite has the same symmetry level as Halite and it is usually found forming cubic crystals that are very popular in the mineral world because of its majestic crystal display under polarizing microscopes. There are only very few known common Halide minerals. A typical Halide mineral is usually soft when examined using the Mohs scale hardness test. It is usually found transparent in appearance and is generally not very dense. Halides have good cleavage that can be seen clearly visible when viewed under geological polarizing microscope. They are often found exhibiting bright colors that are more wonderfully exhibited when the mineral is evaluated under polarized microscopes.



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Wednesday, February 13th, 2008 at 3:54 am
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The Halides Mineral Class
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Click Here For Best Selection Of High Quality Polarizing Microscope