Page 381 - The Effect of Hydrogen and Hydrides - ebook first test
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                                                                
                     
                                         α
                                                                                  
                     
                                         α

                     ̅   −ℎ                                       
                     
                     ̅   −                                        α
                     
                                                   
                         

                                                            = 1, 2, 3

                     
                                                                                                           
                     
                                                                                                              
                     
                         


                        ⊥

                                         
                                   (≡    )
                                       33
                        ‖

                                                      
                                                 
                                           (≡    11  =    )
                                                    22
                                                                        
                     
                                                                             
                                                                (= (   + 2   )/3)
                                                                     ⊥
                                                                           ∥
                     
                         
                     
                         
                     
                                   ≡                                         = 1, 2, 3
                                   ≡                                         = 1, 2, 3
                     ⊥   

                                                       
                                                 (≡    )
                                                     33
                     ∥   

                                                      
                                                 
                                           (≡    11  =    )
                                                    22
                     ,    ,                                (  )             (  )        (  )
                           





                  ∆   111          = (             −                 )            
                                                   ⁄
                                                              (1 1 1)                            = 0°
                                       ℎ         = 70°                 






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