Учебное пособие: Разнообразие кристаллографических форм

                                                                                                                                                     II

                      г         в          г                                                                       

                                                                                                            г                                     г

                  б                              б                                                     

              (0 )                        (0 k )                                                                 в

                                а                                                                                              I

                             (0 0 )

7. Символы простых форм:

а)  моноэдр                                       {0 0 }

6)  диэдр                                           {0 k }

в)  пинакоид                                     {1 0 0}

г)  ромбическая призма                   {h k 0}

д)  ромбическая пирамида              { h k }

Приложение 3

ПРИМЕР ОПИСАНИЯ МОДЕЛИ СРЕДНЕЙ КАТЕГОРИИ

1.  L33L23PC

               2.   Планаксиальный вид,

тригональная сингония,

средняя категория.

               3.  а) призма гексагональная                открытая,  постоянная        формы

                    б) ромбоэдр                                       замкнутая, переменная

                                   L3=IV

               4.                                                     5. γ = 90˚                                   6.

                                                                           α = β = δ = 120˚                       III

        L2=III                                                         а0 = в0 =d0 ≠ с0                          а

                                                                           1 : 1 : 1 : с

                                                                                                      а                                      а

                                                         L2=II

     L2=I                                                                                           

                                                                                                     I  а                а                 а II

7  Символы простых форм:

Призма гексагональная     {1  1 0

ромбоэдр                             {1 0  }

               Для ромбоэдра                                     Для гексагональной призмы

                III ( 0 1 )                                                              III

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