7 twin (F) Twin Laws

Packet Size - 13 words

SEQ Description
+1...+9 Rotation matrix to relate Miller indices of a reflection tothose of its twin-related reflection.
  \(r_{11}, r_{12}, r_{13}, r_{21}, r_{22}, r_{23}, r_{31}, r_{32}, r_{33}\)
  h' = \((r_{11}r_{12}r_{12}) h\)
  k' = \((r_{21}r_{21}r_{23}) k\)
  l' = \((r_{31}r_{32}r_{32}) l\)
  Note that if the space group is non-centrosymmetric,each packet corresponds to two twin laws, i.e. the givenmatrix multiplied by +1 and by -1.
+10 twin volume ratio
+11 esd of twin volume ratio
+12 volume ratio of the inverse (if non-centrosymmetric)
+13 esd of volume ratio (if non-centrosymmetric)