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The chemical formula of mineral Coconinoite is indicated by Fe2Al2(UO2)2(PO4)4(SO4)(OH)2 – 20H2O or Hydrated Iron Aluminum Uranyl Phosphate Sulfate Hydroxide. Coconinoite is actually a Phosphate mineral. The name Coconinoite was actually derived from the name of the locality where it was first discovered. Coconinoite mineral was first found and first described in the year 1966 at Coconino Co in Arizona in the United States. Mineral Coconinoite is known to crystallize in the orthorhombic system of crystal formation. In optical mineralogy, this orthorhombic crystal system comprises crystals having three mutually perpendicular axes, of which all are of different lengths. But Coconinoite mineral can be also possibly found crystallizing in the monoclinic system. The monoclinic system of crystal formation comprises crystals having three axes of unequal lengths. Two of which are usually found in a position that is oblique or not perpendicular to one another. However, both of which are commonly found perpendicular to the third axis. Mineral Coconinoite is a very minor ore of uranium. It is actually a rare uranium mineral. Coconinoite is actually commonly used as a mineral specimen.  By its chemistry alone, Coconinoite is considered as an extremely unusual mineral. By its chemistry, Coconinoite mineral can be found containing not only the uranyl group but also the sulfate group. Mineral Coconinoite is also found exhibiting a good fluorescence under ultra violet light. Mineral Coconinoite is also a radioactive mineral. Thus, it should be stored away from other minerals that can be readily affected by radioactivity. Human exposure should be also limited.

 

Mineral Coconinoite is commonly found in various shades of pale yellow that could appear more splendidly exhibited when mineral specimen is closely evaluated with the aid of petrographic polarizing microscope for mineralogists. Coconinoite can be also found exhibiting vitreous or waxy to dull or earthy luster when it is viewed in reflected light of polarizing light microscopes used in optical mineralogy. Coconinoite specimens show no cleavage planes even when they are closely evaluated with the aid of polarizing light microscope used in optical mineralogy. . The specific gravity measure of the mineral Coconinoite usually gives an approximate value of 2.9 grams per centimeter cube, which is considered average for translucent minerals. The hardness measure of mineral Coconinoite when it is evaluated using the Mohs scale method id usually soft, commonly found in range of 1 to 2. Coconinoite is most commonly found leaving a pale yellow streak when mineral specimen is rubbed on a white porcelain streak plate

 

Coconinoite mineral crystals are commonly found translucent in appearance. The crystal habit of mineral Coconinoite as described in optical mineralogy usually includes crusts, earthy masses, foliated and sometimes scaly aggregates, which are commonly found exhibiting a nice and splendid microscope images when viewed under polarizing light microscopes for mineralogists. Sometimes, these Coconinoite mineral crystals can be also found in lath shapes like a small, thin plaster lath that is usually tabular or rectangular in shape. Some Coconinoite mineral crystals are microscopic that can be only seen clearly when evaluated with the aid of petrographic polarizing light microscope used in optical mineralogy. Mineral Coconinoite is a radioactive mineral and some of its specimens are found fluorescent in ultra violet light.

 

Mineral Coconinoite is most commonly found showing biaxial negative figure when evaluated between crossed nicols of petrographic polarizing microscopes used in optical mineralogy. The refractive indices of the mineral Coconinoite when viewed under polarized light microscopes for mineralogists is commonly found ranging from 1.550 to 1.590. The maximum birefringence displayed by Coconinoite when viewed between crossed nicols of polarizing microscope is commonly 0.040. Coconinoite also shows moderate surface relief when specimen is evaluated under several adjustments on the aperture diaphragm of the polarized light microscope for mineralogists. Coconinoite is often found exhibiting strong dispersion when it is closely viewed with the aid of petrographic polarizing microscope used in optical mineralogy. Coconinoite is pleochroic from colorless to pale yellow when viewed with the aid of polarized microscope used in optical mineralogy. There is no specific data found on the toxicity and health dangers for mineral Coconinoite. However, the specimens of this mineral should be treated with great care and use of sensible precaution is advised upon handling them. The best field indicators of mineral Coconinoite usually include color, locality, fluorescent if present and radioactivity. Mineral Coconinoite notably occurs at some famous mineral localities such as the Sun Valley, Coconino Co, Arizona in the United States.



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Thursday, January 29th, 2009 at 4:03 am
Category:
The Phosphates Mineral Class
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