Fishnet plot

A fishnet plot of the electrostatic rigidity constant a for perovskite structures as a function of the charge Z on the body-centered ion and the charge Q on the edge-centered ion the cube-corner ion would have charge 6 - Z. Three compounds being discussed here are indicated, as well as the simple cubic and body-centered cubic structure, which can also be described this way. 

Figure 1-1. A fishnet plot of a synchronous two-dimensional infrared (2D IR) correlation spectrum of atactic polystyrene in the CH-slretching vibration region at room temperature.

There are many different ways to plot a 2D IR correlation spectrum. A pseudo-three-dimensional representation (so-called fishnet plot) as shown in Figure 1-1 is well suited for providing the overall features of a 2D IR spectrum. Usually, however, 2D IR spectra are more conveniently displayed as contour maps to indicate clearly the location and intensity of peaks on a given spectral plane. In the following section, basic properties of and information extracted from 2D IR spectra are reviewed by using schematic contour maps (Figures 1-10 and 1-11). 

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