نتایج جستجو برای: beryl
تعداد نتایج: 217 فیلتر نتایج به سال:
Variously colored gem-quality iron-bearing beryls from two Brazilian localities, Lavra do Abilio (Minas Gerais) and Garimpo Cercadinho (Bahia), were studied by polarized optical absorption spectroscopy microprobe analysis. The purpose of this study was to investigate the spatial distribution Fe2+ in tetrahedral site that is normally occupied Be2+ along c-axis crystals. This done measuring inten...
This paper deals with the study of beryl, its variety, petrographic, and gemological specifications in Bahr-e-Abad area Jalalabad city. Beryl is a relatively rare silicate mineral, cyclo-silicate, chemical composition Be3Al2 (Si6O18) hexagonal crystal shape. It found igneous metamorphic rocks many parts world. In order to achieve aim this paper, three methods, namely; library work, fieldwork, l...
If you believe this document infringes copyright then please contact the KAR admin team with the take-down information provided at http://kar.kent.ac.uk/contact.html Citation for published version Stapleton, Gem and Plimmer, Beryl and Delaney, Aidan and Rodgers, Peter (2015) Combining Sketching and Traditional Diagram Editing Tools. ACM Transactions on Intelligent Systems and Technology, 6 (1)....
Introduction Elemental beryllium is a steel gray appearing alkaline earth metal with properties like brittleness and high rigidity being the lightest among metals. The majority of beryllium is found in minerals and soils rather than in its elemental form. Beryllium is found in about 30 different mineral species like different compounds including aluminium e.g. Beryl (beryllium aluminium silicate).
P mparison with Brazilian populations. The genotypes RHCE*Ee, K ore prevalent in the population from the state of Santa Catarina i *Cc, RHCE*cc, RHCE*ee, FY*01/FY*02, FY*01/FY*02.N01, FY*02/FY*02, F ypes were more common in the population from the state of S erved in the comparison with Brazilian populations. The genot JK*02/02 were more prevalent in the population from the state of S ddition, ...
Water is characterized by large molecular electric dipole moments and strong interactions between molecules; however, hydrogen bonds screen the dipole-dipole coupling and suppress the ferroelectric order. The situation changes drastically when water is confined: in this case ordering of the molecular dipoles has been predicted, but never unambiguously detected experimentally. In the present stu...
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