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The chemical composition of mineral Calcioancylite-(Nd) is indicated by the formula CaNd(CO3)2(OH)•(H2O). Calcioancylite-(Nd) is usually found occuring at miarolitic cavity in granite. This mineral is usually found at its type of locality at Baveno, Piedmont, Italy. Calcioancylite-(Nd) was named for the composition and from the Greek “curved,” in allusion to the rounded and distorted character of the crystals. Calcioancylite-(Nd) is known to crystallize in the monoclinic system of crystal formation. In optical mineralogy, 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 Calcioancylite-(Nd) is commonly found colored pink in hand sample. Most crystals of mineral Calcioancylite-(Nd) are found transparent in appearance. The hardness measure of mineral Calcioancylite-(Nd) is found ranging from 4 to 4.5 when evaluated using the Mohs scale method. Calcioancylite-(Nd) is usually found exhibiting vitreous or glassy luster in reflected light of polarizing microscopes. Calcioancylite-(Nd) is most commonly found showing biaxial negative figure when viewed between crossed nicols of polarizing microscopes. Calcioancylite-(Nd) is usually found showing a birefringence of 0.1010. Calcioancylite-(Nd) is found to have weak radioactivity.



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Friday, April 29th, 2011 at 8:20 am
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Optical Mineralogy
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