Rubidium hexahydridoplatinate IV

The INS spectrum of rubidium hexahydridoplatinate(IV), Rb2[PtH6], obtained on the direct geometry spectrometer MARI, is given in Fig. 5.10. As anticipated from the considerations presented above the spectrum consists of a series of ridges, all relatively well-defined in energy but broad as a function of Q. The point where the scattering reaches a maximum (as a function of Q) defines the mass-line that joins that point to the origin, for an effective mass, /Weff. 

From the data of Fig. 5.10 we can determine the point at which the intensity reaches a maximum for a given vibration, see also Fig. 2.4. Further, differentiating Eq. (2.41) with respect to 

All single quantum events, n = 1, involving the same a ) reach their maximum intensity at the same value of (and so of g) and all higher quantum events, 1, reach their maximum at a higher fixed value of g. Combining Eqs. (5.25) and (2.72) yields 

In the limit that u = a ) then /Wefr = My The scattering from the atoms in a sample approaches this limit when the great majority of their displacement arises from a single vibrational mode. However, unless this 

This is related to similar but subtly different effects observed on indirect geometry spectrometers ( 5.2.1.2). The INS spectrum of Rb2[PtH6], obtained on the low-bandpass spectrometer TOSCA, is given 

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It is difficult to demonstrate this on the observed spectra of typical organic systems because of their large number of transitions. Therefore, we have chosen to discuss the spectrum of a simple molecular hydride, rubidium hexahydridoplatinate(IV), Rb2[PtHe] [20]. Every hydrogen is equivalent within this octahedral. Oh, ion and the ions are sufficiently separated that they do not interact. The high mass of platinum completely... 

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