The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
High frequency Raman scattering spectra of (KH 2 PO 4 ) 1-x (KD 2 PO 4 ) x have been reproduced by a simple addition of KH 2 PO 4 (KDP) and KD 2 PO 4 (DKDP) spectra. Through this procedure we can separate the hydrogen (deuterium) modes from the PO 4 internal vibration modes. The frequency ratio of the hydrogen modes to the deuterium modes is 1.37 both in the paraelectric phase and ferroelectric phase.