si 2造句

• While investigations on doped superconductors led to the conclusion that the existence of localized magnetic moments and superconductivity in one material was incompatible, the opposite was shown, when in 1979 heavy fermion superconductivity in the material CeCu 2 Si 2.
• Type I dyotropic rearrangements also occur around carbon-oxygen bonds, such as the thermal equilibration of RRSi 1 R 3 C-O-Si 2 R 3 to RRSi 2 R 3 C-O-Si 1 R 3.
• "' Cymrite "'is a silicate mineral with the chemical formula BaAl 2 Si 2 ( O, OH ) 8 稨 2 O . The mineral is named for Cymru, which is the Welsh word for Wales.
• Because of oxygens not bound to silicon in the Si 2 O 7 groups of wadsleyite, it leaves some oxygen atoms underbonded, and as a result, these oxygens are hydrated easily, allowing for high concentrations of hydrogen atoms in the mineral.
• Madagascar and Iveland-Evje region in Norway have the only deposits of minerals with high scandium content, thortveitite ( Sc, Y ) 2 ( Si 2 O 7 ) and kolbeckite ScPO 4 ?H 2 O, but these are not being exploited.
• It has a general formula of ( Ca, Mg, Fe ) ( Mg, Fe ) Si 2 O 6 The calcium cation fraction can vary from 5 % to 25 %, with iron and magnesium making up the rest of the cations.
• For example, Hong Kong people find it difficult to say " ` O ( u P mau 1-si 2 right-click烿highlightrUW [ " ( " You use the right-click of the mouse to highlight the words " ) in pure Cantonese.
• The base structure becomes either [ AlSi 3 O 8 ]  " or [ Al 2 Si 2 O 8 ] 2 " There are 22 mineral species of feldspars, subdivided into two major subgroups alkali and plagioclase and two less common groups celsian and banalsite.
• One-fifth of the silicon atom is in isolated tetrahedral and four-fifths is in Si 2 O 7 groups so that the structure can be thought of as a mixture of one-fifth spinel and four-fifths wadsleyite ( Horiuchi and Sawamoto, 1981 ).
• Experimental work on these molecules is not easy, but matrix isolation spectroscopy of the products of the reaction of hydrogen atoms and silicon and aluminium surfaces has found the ground state ring structures and the cis-mono-bridged structures for Si 2 H 2 and Al 2 H 2.