1.62 - Conventions for space group settings in WinGX

 Monoclinic   unique axis b   unique axis c   unique axis a
                abc   c-ba      abc   ba-c      abc   -acb
               ------------    ------------    ------------
cell choice 1   :b1   :-b1      :c1   :-c1      :a1   :-a1
            2   :b2   :-b2      :c2   :-c2      :a2   :-a2
            3   :b3   :-b3      :c3   :-c3      :a3   :-a3
 
 Orthorhombic   :ba-c    change of basis abc -> ba-c
                :1       origin choice 1
                :2ba-c   origin choice 2, change of basis abc -> ba-c
 
 Tetragonal     :1       origin choice 1
 & Cubic        :2       origin choice 2
 
 Trigonal       :h       hexagonal    axes
                :r       rhombohedral axes