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The chemical formula of mineral Calciobetafite is usually indicated by Ca2(Ti,Nb)2(O,OH)7. Mineral Calciobetafite is most commonly found in a subvolcanic rock, locally termed “sanidinite”, present in a phreatomagnitic explosion breccia. Calciobetafite is most commonly found at its type of locality at Monte di Procida, Campi Flegrei, near Naples, Campania, Italy. Calciobetafite was named for the mineral with the betafite structure and the CALCIum content. Mineral Calciobetafite is known to crystallize in the isometric system of crystal formation. In optical mineralogy, this isometric crystal system comprises crystals having three axes, all of which are perpendicular to one another and all are found equal in lengths.

Calciobetafite is most commonly found colored reddish brown when viewed closely under polarized light microscope used in the field of optical mineralogy. The specific gravity measure of mineral Calciobetafite is usually found ranging from 4.2 to 4.5 grams per cubic centimeters, giving an average of about 4.34. Most crystals of mineral Calciobetafite are found subtranslucent to opaque in appearance. Mineral Calciobetafite is commonly found showing conchoidal to uneven fracture when viewed closely under polarizing microscope for mineralogists. This is actually showing uneven fracture producing small, conchoidal fragments which can be found more clearly visible under polarizing microscope used in the field of optical mineralogy. The crystal habit of mineral Calciobetafite as described in the field of optical mineralogy is usually found metamict. This is usually where mineral is originally crystalline and now became amorphous due to radiation damage. The hardness measure of mineral Calciobetafite when it is evaluated using the Mohs scale method is usually found ranging from 4.5 to 5.5. Calciobetafite is most commonly found exhibiting resinous luster when evaluated in reflected light of polarizing light microscope used in the field of optical mineralogy. Calciobetafite is found to be an isotropic mineral after it was evaluated between crossed nicols of petrographic polarizing light microscope used in the field of optical mineralogy. Calciobetafite is a radioactive mineral.



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Monday, August 30th, 2010 at 6:14 am
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Optical Mineralogy
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