金属半径和阳离子半径与电子构型的定量关系

元素的金属半径和阳离子半径与其电子构型密切相关 .在周期表中金属半径可以用一个统一的公式计算出来 ,该公式说明金属半径完全可以从元素的电子构型分析计算 ;而通过定性和定量结合的方法则可以揭示出阳离子半径与电子构型的理论联系 .计算结果与文献公布的数值符合较好 ,标准偏差图也说明了计算结果的准确性 .本研究说明金属半径和阳离子半径本质上是元素电子构型的反映 ,是元素在周期表中位置的一种反映     

NaAlSiO_4-KAlSiO_4-SiO_2-H_2O体系在5kbar下的相图

本文测定了Ne-Ks-Q-H_2O体系在P_(H_2O)=5khar下二氧化硅不饱和区域的相图,发现了在霞石—长石结晶分界线上的最高熔融温度(Ne_(37)Ks_(37)Q_(26),715℃).在Ne-Ks体系中固相线与离溶线相交,导致了霞石、六方钾霞石的结晶分界线从Ne-Ks连线延伸至Ne_(25),Ks_(51)Q_(24)在630℃组成“三元系”共结点。高压下富钾熔体的结晶路线可以用来解释天然富钾碱性岩的结晶过程。     

The quantitative relationship between metal radii, cationic radii and electronic configurations of elements

A close relationship has been found between the metal radii, cationic radii and electronic configurations of elements. A unified formula for calculating metal radii is presented, whose paramatem are only related to the electronic configuration. Meanwhile theoretical relation between cationic radii and electronic configuration can be revealed by combining quantitative analysis with qualitative analysis. The calculated results and the charts of standard deviations are coincident with those given by reference books. Our work indicates that the metal radius and cationic radius of an element reflect in essence the element's configuration.     

EQUILIBRIUM PHASE DIAGRAM OF THE SYSTEM NaAlSiO_4-KAlSiO_4-SiO_2-H_2O at P_(H_2O)=5kb

The phase relations of the undersaturated part of the system Ne-Ks-Q-H_2O at P_(H_2O) =5kb aredetermined in this paper, and the liquidus maximum (Ne_(37)Ks_(37)Q_(26), 715℃) on the field boundary betweenalkali-feldspar and nepheline was first found by the authors. In the system Ne-Ks at P_(H_2O) =5kb, thefact that the solidus intersects the nepheline-kalsilite solvus means that the field boundary between nephe-line and kalsilite extends from the side line and forms a "ternary" invariant point at Ne_(25)Ks_(51)Q_(24) and630℃. The paths of crystallization of K-rich liquids at high pressure can be applied to explain thecrystallization processes of natural alkali rocks which are rich in K_2O.     

松辽盆地咸含水层埋存CO2储存容量初步估算

沉积盆地深部存在体积巨大的咸含水层,是很好的埋存CO2的地质储体。可靠合理的估计CO2储存容量是选择场址的重要前提。目前国际上较为通用的评价CO2储存容量是金字塔评价方法。松辽盆地咸含水层岩性以白垩系的嫩江组砂岩和青山口组砂岩为主,空隙发育较好,盖层连续完整且封闭良好,决定了其可以作为储存CO2的地质储体。以松辽盆地为实例,估算了咸含水层CO2理论储存容量大约为6916Gt。