CONCEPT OF "ENTROPY LIMIT" AND SOME OF ITS APPLICATIONS

Provide molar volumes of all phases and entropies of all phases except phase X are knownin a multisystem, the value that is taken as the entropy of the phase X when all the slopes in-volved in a Schreinemakers bundle possess the same value is defined as the "entropy limit"of phase X, L_x, with respect to that bundle. If the PT bundle is in clockwise sense when avalue less than L_x is assumed to be S_x~0, then the bundle must be in counterclockwise sensewhen a value greater than L_x is taken as S_x~0, or vice versa. Examples are given in this paperto illustrate the application of this concept to (i) the determination of orientation for somebundles, and (ii) the determination of univariant lines with maximum and minimum PT slopesfor a given bundle.     

二元六相(n+4)多体系的封闭网图

二元六相(n+4)多体系的五点全网系是构成特征的八点和九点封闭网的基础.15个八点封闭网中只有13个有合理的网图.九点全网系有12种合理的封闭网图.凡是在大括号中出现化学成份图解轴最边缘两个相符号的八点和九点封闭网都没有合理的封闭网图.     

在原始文献中发表由实验导出的数据的原则

1980年秋天,国际数据库(CODATA)的秘书长Edgar westrum Jr.教授来华访问,曾同我们谈起,许多科学研究工作中所得的数据,或者由于实验条件以及研究对象没有明确规定,或者由于在报道中没有写入这些规定,致使这些数据不能为其他科学工作者利用或重复验证。国际数据库有鉴于此,组织了一些专门委员会,或委托一些专门学会,请他们进行研究,并写出一系列有关各学科的数据报道准则,供世界各地的科研工作者参考使用。这些准则只涉及数据报道的最低要求,以及一些可供选择的简明报道方式。它们不是科学论文的写作示范。科研工作者发表科研成果的目的之一,是希望与其他科研工作者进行学术交流,当然愿意自己的工作成果能被其他工作者所利用。我们认为,我国的科研工作者,特别是年轻的科研工作者,如果能够掌握这些准则,对达到上述交流目的,将有所裨益。为此,我们拟从国际数据库所提供的资料中,选一些与化学学科有关的数抓报道准则及数据资料,陆续翻译后在《化学通报》上刊登。我们对国际数据库和Westrum教授,谨致谢意。     

n k(k≥4)相多体系封闭网的拼合原理

本文讨论了n k(k≥4)相多体系的某些性质,并系统提出了描述它们的标记符号。在此基础上,提出并论证了n k相多体系封闭网的拼合原理,拼合原理说:任一n k(k≥4)相多体系的封闭网,若不是该多体系所包含的某一n 3级子多体系封闭网本身,就是该多体系所包含的两个或两个以上不同的n 3级子多体系封闭网的拼合。     

一元五相(n+4)多体系的全网系及对相图具体构型的应用

本文用一元五相(n+4)多体系的全网系解释了Kujawa等提出的有五个稳定相的一元系相图的基本形式,并把作者提出的由三种固相多形、一个液相和一个汽相所构成的一元五相多体系的相图类型归结为各封闭网图,判明了各相图类型中各单端线段所直接连向的无变度点.     

EIGHT-POINT STRAIGHT-LINE-NET-DIAGRAMS OF BINARY SIX-PHASE (n+4) MULTISYSTEMS (Ⅰ)——DERIVATION FROM NINE-POINT CLOSED-NET-DIAGRAMS

The 9-point closed-net-diagrams of binary 6-phase multisystems contain 2 basic types ofnon-straight-line portions. Only the removal of an invariant point which is shared by all thenon-straight-line portions in a 9-point closed-net-diagram can generate an 8-point straight-line-net-diagram. All together 67 distinct 8-point straight-line-net-diagrams have been derived forbinary 6-phase multisystems. They correspondingly belong to 31 distinct 8-point straight-line-nets (namely, 31 distinct 8-point sets), showing that the previous conclusion that there existsonly one 8-point straight-line-net-diagram for binary 6-phase multisystems is incorrect.     

CONSTRUCTION OF EQUILIBRIUM P-T BUNDLES OF COMBINATION OF n+2 PHASES ON PETROGENETIC GRIDS

This paper first discusses the algorithm for balancing reactions of the combination of n + 2 phases around an invariant point on a P-Tdiagram, and then emphatically develops a new algorithm for the arrangement of univariant reaction lines, using a signum matrix V·F or S·F, where V and S are diagonal matrixes of signum of △V and △S in n+2 univariant reactions respectively, and F is a signum matrix of stoichiometric coefficients of phases in reactions. Using this new algorithm greatly simplifies relative computer programs, brings out the automatic construction of equilibrium P-T curves of combination of n +2 phases, and further makes it possible to construct a whole petrogenetic grid automatically     

COMBINATION PRINCIPLE FOR CLOSED NETS OF n k(k≥4) PHASE MULTISY

In this paper some properties of n k (k≥4) phase multisystems are discussed and thesymbolism depicting them is proposed systematically. Upon this, the combination principle forclosed nets of n k phase multisystems is preseted and elucidated. The combination principlestates: Any closed net of one n k (k≥4) phase multisystem must be a combination of two ormore distinct n 3 order submultisystem closed nets belonging to the given n k multisystem,if it is not one of the n 3 order submultisystem closed net itself. The presentation of thecombination principle provides both the theoretical basis and the practical way for investigationand solution of the topological configurations of the phase diagrams of any n k phase multisystems.     

二元六相(n+4)多体系的八点直线网图——Ⅰ.由九点封闭网图推导

二元六相多体系的九点封闭网图包含了两种基本类型的非直线部分。只有除去某九点封闭网图所包含的全部非直线部分所共享的一个无变度点,才可能获得1张八点直线网图。总共导出了二元六相多体系的67张不同的八点直线网图。它们分属31个不同的八点直线网(即31个不同的八点集合)。由此,证明了过去关于二元六相多体系仅有1张八点直线网图的结论是错误的。     

n+4相多体系的拓扑结构

本文揭示了n+4相与m+3相多体系图示上所存在的基本差异,证明了n+4相多体系中一条单变度曲线虽与三个无变度点有关,但其稳定部份只能出现在两个稳定的无变度点之间,在此基本定理的基础上,发现不再能用一张全网图而要用一组网图构成的全网系才能反映出n+4相多体系的全部相关系,文中还给出了一元、二元和三元n+4相多体系的全网系。