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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 mineral Adamite is indicated by Zn2AsO4OH or Zinc Arsenate Hydroxide. Adamite is actually a Phosphate mineral. The name of the mineral originated from the name of a Frenchman. It was named Adamite in honor to a French mineralogist Gilbert Joseph Adam (1795-1881). Adamite is a fluorescent kind of mineral. It exhibits a consistent bright green fluorescence in either long wave or short wave ultraviolet light. For this characteristic, Adamite is considered as a favorite fluorescent mineral of serious collectors. It also possesses wonderful appearance as a mineral specimen even in ordinary light. It shows exquisite beauty when viewed under a petrographic polarizing microscope used in the field of optical mineralogy as it exhibits its adamantine crystals of lime green color. It is most often found sitting on top of red limonite matrix as its common mineral associate. Together they made up an attractive mineral specimen when viewed under polarizing light microscopes for mineralogists.

 

            Adamite can be easily distinguished among other minerals. It is best identified through its high density and high luster property in reflected light of polarized microscope used in the field of optical mineralogy. Also, by exhibiting its typical bright green color and showing its sub botryoidal crystal habits under petrographic polarizing light microscopes used in optical mineralogy. Although Adamite is known to be isostructural with cupradamite, olivenite, and libethenite, it can be, as mentioned, easily identified. Isostructural means they exhibit the same symmetry and shows similar crystal shapes and this can be seen clearly visible when evaluate with the aid of polarizing microscope for mineralogists.

 

            When the mineral is viewed under a petrographic polarizing microscope used in the field of optical mineralogy, the mineral shows an orthorhombic crystal formation. In optical mineralogy, this orthorhombic crystal system comprises crystals having three mutually perpendicular axes, of which all are of different lengths. Some geologists may find it dipyramidal in form. The modifications of included diamond-shaped prisms with minor prismatic faces that are often found clearly visible under polarizing microscope for mineralogists. It can also be seen exhibiting a double triangle termination that can be noticed easily when the examination is made with the aid of petrographic polarizing light microscope used in the field of optical mineralogy. This habit occurs in druses and radiating cluster where formations of wheel sheaf shapes are splendidly exhibited under petrographic polarizing microscope used in optical mineralogy. But in perfectly smooth botryoidal habit, this appearance is considered very rare. This mineral is commonly found with well-formed crystals terminated in double triangle and usually sparkling on top of the bytryoidal surface. Several other habits can be seen as exhibited under polarizing microscopes for mineralogists. Some crystal growth in cavity results to surface numerous crystal tips. This is clearly visible when viewed under polarized light microscope used in optical mineralogy. Some other appearances are the formation of aggregates on matrix and the formation of thin dimensions in one direction as the stage of a petrographic polarizing microscope for mineralogists is rotated in different angles.

 

            The mineral is known to have 3.5 hardness measure when evaluated using the Mohs scale method. The fracture exhibited is usually conchoidal when the mineral is evaluated under several adjustments on the aperture diaphragm of the polarized light microscopes used in optical mineralogy. Adamite crystals are also considered brittle, a property often displayed by glasses and most non-metallic minerals. The specific gravity measure of the mineral is commonly found as 4.4 grams per cubic centimeters, which is considered heavy for translucent minerals. When Adamite mineral specimen is rubbed on a white porcelain streak plate, it is commonly found leaving a white to pale streak. It also shows high adamantine luster when viewed in reflected light of petrographic polarizing microscope used in optical mineralogy. The cleavage found when the mineral Adamite is evaluated under several adjustments on the aperture diaphragm of petrographic polarizing microscope is commonly perfect in two directions at non-right angle to each. Mineral Adamite exhibits a typical green color when viewed under a polarizing microscope used in optical mineralogy due to its high copper content or sometimes uranium constituent. Adamite mineral specimens are usually found pink or sometimes yellowish green in color when evaluated under polarizing light microscopes for mineralogists. They may also appear in yellow or white and sometimes purple due to trace amount of cobalt. Several varieties of colors and hues that can be splendidly exhibited under polarized light are clearly visible with the aid of petrographic polarizing light microscopes used in the field of optical mineralogy. Mineral Adamite is commonly found having biaxial figure and is optically positive when evaluated between crossed nicols of polarizing microscopes. It exhibits high double refraction when viewed in plane-polarized light of polarizing microscopes. A weak pleochroism is also visible as exhibited under polarized microscopes. This mineral usually occurs in oxidizing and weathering zones. Apparently occurring in arid environments.      



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Saturday, November 28th, 2009 at 10:30 am
Category:
The Phosphates Mineral Class
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