Triangular diagrams right triangle

Further use of graphical methods is discussed by Scheibel(8), though here attention is confined to the use of right-angled triangular diagrams. Equilateral triangles will also be used in liquid-liquid extraction, as illustrated in Chapter 13. 

That is, the amounts of B and C are referred to a constant amount of A. It should be remembered that in the triangular diagram a line parallel to one of the sides indicates, at a given temperature, a constant amount of the component represented by the opposite corner of the triangle and hence, points in plane parallel to one face of a right prism, will indicate, for different temperatures, variation in the amounts of two components, but constancy in the amount of the third. See also Janecke, Z. anorgan, Ckem. 1906, 51, 132. 

Figure 3.5 Representation of a ternary system with components A, B, and C. (a) Triangular diagram using an equilateral triangle or a right-angled isosceles triangle. Shown are the construction of grid lines and scales, (b) Three-dimensional representation of a ternary system A, B, and C in the triangular prism. The three vertical faces of the prism characterize the three...

The composition of a mixture with three components is best represented by a point in a triangular diagram which has the form of an equilateral triangle and which can be considered a non-orthogonal coordinate system. In Fig. 15. for example, x is plotted as abscissa and x as ordinate, while the concentration of the first component is determined by x = — x — x. x may also be plotted upwards along the right-hand side of the triangle. 

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