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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。 相似文献
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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. 相似文献
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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. 相似文献
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