نتایج جستجو برای: beryl
تعداد نتایج: 217 فیلتر نتایج به سال:
Low-energy excitations of a single water molecule are studied when confined within a nano-size cavity formed by the ionic crystal lattice. Optical spectra are measured of manganese doped beryl single crystal Mn:Be3Al2Si6O18, that contains water molecules individually isolated in 0.51 nm diameter voids within the crystal lattice. Two types of orientation are distinguished: water-I molecules have...
1 Dipartimento di Science, Università Roma Tre, Rome, Italy, 2 Laboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, Rome, Italy, 3 Laboratorio di alte pressioni e temperature, Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy, 4 Diamond Light Source Ltd, Oxford, UK, 5 Department of Mathematics and Physics, Università Roma Tre, Rome, Italy, 6 Institut für Mineralogi...
Laser-induced breakdown spectroscopy (LIBS), accompanied by chemometric data analysis, is used to identify and classify gemstones of various hardness. The study involves several gemstones: amethyst, aquamarine beryl, bloodstone citrine, diopside, enstatite. Their hardness determined through a correlation utilizing the spectral intensity ratio ionic atomic lines an identified element in LIB spec...
A study of the trace element composition beryl varieties (469 SIMS analyses) was carried out. Red beryls are distinguished by a higher content Ni, Sc, Mn, Fe, Ti, Cs, Rb, K, and B lower Na water. Pink characterized Na, Li, Cl, water with Mg Fe. Green defined increased Cr, V, Mg, reduced Cs. feature yellow is Cl. Beryls various shades blue dark (aquamarines) Fe Cs Rb content. For white beryls, L...
LCT-granitic pegmatites as defined by (Cerny, 1991) are anomalously enriched in Li, Rb, Cs, Be, Sn, Ga, Ta>Nb, (B,P,F) and are host to many of the worlds most precious gemstones including emerald, chrysoberyl and topaz (Minas Gerais, Brazil), sapphire and ruby (Afghanistan and Pakistan), and gem tourmaline (Pala District, California). Twelve Minfile (MF) occurrences of LCT-pegmatites are record...
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