Phonons
                        
                        
                            Eckold, G., 
                        
                        
                                        
                                            International Tables for Crystallography
                                         (2013). 
                                         
                                            Vol. D,
                                            
                                                            
                                                                        ch. 2.1,
                                                            
                                                            
                                                                pp. 286-313
                                                                        
                                            
                                        
                        
                        
[ doi:10.1107/97809553602060000911 ]
                        Press. Google Scholar 
 
        Dove, M. T.  (1993).   Introduction to lattice dynamics  . Cambridge University Press. (ISBN 0–521–39293–4.) Google Scholar 
 
        
Eckold, 
G.  (1992).   UNISOFT – a program package for lattice-dynamical calculations ...
                            
                            
                            
                            
                    
                        
                            Symmetry of lattice vibrations
                        
                        
                            Eckold, G., 
                        
                        
                                        
                                            International Tables for Crystallography
                                         (2013). 
                                         
                                            Vol. D,
                                            
                                                            
                                                                Section 2.1.3,
                                                                    
                                                            
                                                                pp. 294-311
                                                                        
                                            
                                        
                        
                        
[ doi:10.1107/97809553602060000911 ]
                        
                            
                                     [
more
                                    results from section 2.1.3 in volume D]
                            
                            
                            
                            
                    
                        
                            Conclusion
                        
                        
                            Eckold, G., 
                        
                        
                                        
                                            International Tables for Crystallography
                                         (2013). 
                                         
                                            Vol. D,
                                            
                                                            
                                                                Section 2.1.4,
                                                                    
                                                            
                                                                pp. 311-311
                                                                        
                                            
                                        
                        
                        
[ doi:10.1107/97809553602060000911 ]
                           Phonon dispersion relations in insulators  . Springer Series in Solid State Sciences, Vol. 10. Berlin: Springer. (ISBN 3–540–09399–0.) Google Scholar 
 
        
Eckold, 
G.  (1992).   UNISOFT – a program package for lattice-dynamical calculations: user ...
                            
                            
                            
                            
                    
                        
                            Introduction
                        
                        
                            Eckold, G., 
                        
                        
                                        
                                            International Tables for Crystallography
                                         (2013). 
                                         
                                            Vol. D,
                                            
                                                            
                                                                Section 2.1.1,
                                                                    
                                                            
                                                                pp. 286-286
                                                                        
                                            
                                        
                        
                        
[ doi:10.1107/97809553602060000911 ]
                        
                            
                            
                            
                            
                    
                        
                            The dynamical matrix
                        
                        
                            Eckold, G., 
                        
                        
                                        
                                            International Tables for Crystallography
                                         (2013). 
                                         
                                            Vol. D,
                                            
                                                            
                                                                Section 2.1.2.3,
                                                                    
                                                            
                                                                pp. 287-288
                                                                        
                                            
                                        
                        
                        
[ doi:10.1107/97809553602060000911 ]
                        
                            
                                     [
more
                                    results from section 2.1.2 in volume D]
                            
                            
                            
                            
                    
                        
                            Glossary
                        
                        
                            Eckold, G., 
                        
                        
                                        
                                            International Tables for Crystallography
                                         (2013). 
                                         
                                            Vol. D,
                                            
                                                            
                                                                Section 2.1.5,
                                                                    
                                                            
                                                                pp. 311-312
                                                                        
                                            
                                        
                        
                        
[ doi:10.1107/97809553602060000911 ]
                        the complex-conjugate quantity   
 	    +    	  denotes the Hermitian conjugate matrix   
 	      T      	  denotes the transposed matrix   
  
  
  
 
 
 
 
 
 
 
 
 
    References   
        
Eckold, 
G.  &  Hahn, Th.  (1987).   Gitterdynamik von ...