Uptake of alkaline earth metals in Alcyonarian spicules (Octocorallia)
نویسندگان
چکیده
منابع مشابه
The effect of alkaline earth metals (Magnesium and Calcium) on Hydrogen storage efficiency of alanate nanopowders
Different Aluminum: alkaline earth metal atomic weight ratios effects on structure transformations in alanates nanopowders were studied. Changes in crystal structures from alane to alanates by increasing alkaline earth metals dopants in the mixture with slight changes in crystal structures from rhombohedral centered – trigonal (alane) to trigonal (magnesium alanate), and monoclinic (calcium ala...
متن کاملThe effect of alkaline earth metals (Magnesium and Calcium) on Hydrogen storage efficiency of alanate nanopowders
Different Aluminum: alkaline earth metal atomic weight ratios effects on structure transformations in alanates nanopowders were studied. Changes in crystal structures from alane to alanates by increasing alkaline earth metals dopants in the mixture with slight changes in crystal structures from rhombohedral centered – trigonal (alane) to trigonal (magnesium alanate), and monoclinic (calcium ala...
متن کاملFirst-principles solubilities of alkali and alkaline-earth metals in Mg-B alloys
In this article, we present a comprehensive theoretical study of solubilities of alkali Li, Na, K, Rb, Cs and alkaline-earth Be, Ca, Sr, Ba metals in the boron-rich Mg-B system. The study is based on first-principles calculations of solutes formation energies in MgB2, MgB4, MgB7 alloys and subsequent statisticalthermodynamical evaluation of solubilities. The advantage of the approach consists i...
متن کاملTopological Dirac nodal lines and surface charges in fcc alkaline earth metals
In nodal-line semimetals, the gaps close along loops in k space, which are not at high-symmetry points. Typical mechanisms for the emergence of nodal lines involve mirror symmetry and the π Berry phase. Here we show via ab initio calculations that fcc calcium (Ca), strontium (Sr) and ytterbium (Yb) have topological nodal lines with the π Berry phase near the Fermi level, when spin-orbit interac...
متن کاملConvergence of multibody expansions for alkaline earth metals. Contrast between magnesium and beryllium clusters
An ab anitio SCF-LCAO-MO study of nonadditive three-and four-body interaction energies in Mg 3 (equilateral and linear) and M84 (tetrahedral) clusters is presented. The relative importance of these few-body terms to the interaction energy is at most 39% for three-and 8% for four-body terms. This lies in marked contrast with the case of Be clusters where these terms can have a relative weight of...
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ژورنال
عنوان ژورنال: Geochimica et Cosmochimica Acta
سال: 2012
ISSN: 0016-7037
DOI: 10.1016/j.gca.2012.01.037