نتایج جستجو برای: ایزوتوپ های sm nd و rb sr
تعداد نتایج: 858753 فیلتر نتایج به سال:
We successfully synthesized La- and Sm-doped phenanthrene powder samples and observed superconductivity in them at T(c) around 6 K. The T(c)s are 6.1 K for La(1) phenanthrene and 6.0 K for Sm(1) phenanthrene, which are enhanced by about 1 and 0.5 K compared to those in A(3) phenanthrene (A = K and Rb) and in Ae(1.5) phenanthrene (Ae = Sr and Ba) superconductors, respectively. The superconductiv...
Apatite-bearing ore occurrence Muostalaah and phosphate deposit Birikeen are magnesiocarbonatite complexes of the Seligdar type, located within Nimnyrskaya submeridional metallogenic domain in Aldan-Stanovoy shield South Yakutia, Russia. This study presents geochemical characteristics carbonatites adjacent apatite-bearing silicate rocks apatite occurrence. Comparison these with other world was ...
چکیده در منطقه بیشه واقع در شرق بلوک لوت، هورنبلند دیوریت¬های پورفیری در سنگ¬های رسوبی و آذرین (توف ها و سنگ های دیوریتی پیروکسن دار) نفوذ نموده و به ترتیب تشکیل اگزواسکارن و اندواسکارن داده است. توده های نفوذ کننده دارای ماهیت ساب آلکالن و متا آلومین بوده و بر اساس پذیرفتاری مغناطیسی و خصوصیات ژئوشیمیایی، وابسته به سری مگنتیت و گرانیتوئیدهای نوع i هستند. غنی شدگی عناصر نادر خاکی سبک (lree)، ف...
The research in NANE group is focused on the development of the NAA (Neutron Activation Analysis) methodologies and on their application to environment, nutrition and epidemiology studies. NANE is a multidisciplinary group that has the collaboration of researchers from different fields of science: environment, chemistry, physics, environmental health, biology, biochemistry and geology. The capa...
Introduction: The Moon is believed to have formed from debris produced by a giant impact of a Mars sized body with the Earth (at around 4.51 Ga), forming a primitive body with a thick global layer of melt referred to as the Lunar Magma Ocean (LMO) [1]. The crystallization of LMO created internal strati-fication of the Moon forming main geochemical reservoirs. The surface features on the Moon we...
Whole-rock major and trace element and O, Sr, Nd and Pb isotopic data are reported for 3.0–0.89 Ma lamproites from the Leucite Hills, Wyoming, USA. The two main groups of lamproites, madupitic lamproites and phlogopite lamproites, are geochemically distinct and cannot be related to one another by either fractional crystallization or crustal contamination. It seems likely that the geochemical di...
Optimum (La 0.2 Nd Sm Ca Sr )MnO 3 exhibits excellent high-temperature resistance to elemental segregation and chemical compatibility with 8YSZ while maintaining good electrical conductivity.
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