It crystallizes in the hexagonal close-packed structure and is a superconductor below 11.2 K. Except for technetium-99, technetium-97, and technetium-98 (4,200,000-year half-life), technetium isotopes are short-lived. The metastable isotope technetium-99m (6-hour half-life), used with ...
一种掺杂锝—99的核燃料元件,将燃料芯块叠放入锆四合金包壳管中,用压紧弹簧压紧后,包壳管两端口由端塞密封固定构成,其特征是燃料芯块为锝—99与二氧化铀的混合物,其中锝—99的核子密度与锝—99,二氧化铀中铀—238的核子密度之和的比值为10%～90%. One dopant technetium-99 nuclear fuel elements, the fuel...
英:[tekˈni:ʃɪəm] 美:[tɛkˈniʃiəm, -ʃəm] technetium是什么意思 n.【化】锝(元素符号:Tc) technetium自然拼读 tech·ne·ti·um teknishm technetium英英释义 n.a crystalline metallic element not found in nature; occurs as one of the fission products of uranium ...
内容提示: Chemistry of Technetium 99m J. Steigman and P. Richards The detection of a number of impurities in ~mTc effluents from 99M0 generators is im- portant for proper use of the generator systems. Their identification is described in this review. Technetium in sulfur colloid is probably ...
The pyrophosphate ion of Tc-99m binds to calcium deposits in damaged heart muscle, thereby making it useful to gauge damage after a heart attack. Similarly the sulfur colloid of Tc-99m is cleaned by the spleen, thus making it possible to image the organ’s structure. Technetium also acts ...
Technetium (pronounced /tɛkˈniːʃiəm/ tek-NEE-shee-əm) is the chemical element with atomic number 43 and symbol Tc. It is the lowest atomic number element without any stable isotopes. Nearly all of technetium is produced synthetically and only minute amounts are found in nat...
the structure of the α-polymorph consists of triangles with short M-M distances. β-TcCl3 features octahedral Tc centers, which are organized in pairs, as seen also for molybdenum trichloride. TcBr3 does not adopt the structure of either trichloride phase. Instead it has the structure of mo...
1982 451Preparation and Crystal Structure of Carbonyltris(diethy1dithiocarb-amato)technetium(iii) : An Unexpected Source of Co-ordinated CarbonMonoxideBy John Baldas, John Bonnyman, Peter M. Pojer, and Geoffrey A. Williams, Australian RadiationMaureen F. Mackay, Department of Physical Chemistry, ...
Today, there are ~35 isotopes of Tc that are known with atomic masses (A) spanning fromA = 85 to 120. None of the isotopes of Tc are stable, making it the lightest inherently radioactive element on the periodic table6. On Earth,99gTc (t1/2 = 2.11 × 105 y) is...
Cornell, R. M. & Schwertmann, U.The Iron Oxides: Structure, Reactions, Occurrences and Uses,2nd edn. (Wiley-VCH, 2003). Smith, F. N. et al. Computational investigation of technetium(IV) incorporation into inverse spinels: magnetite (Fe3O4) and trevorite (NiFe2O4).Environ. Sci. Technol...