text: This family of clusters includes the closo cages  and their derivatives.
  Isomerism is well established in this family: 
  *2,3- and 2,4-
  *2,3- and 2,4-
  *1,2- and 1,6-
  *1,10-, 1,6-, and 1,2-
  *1,2 and 1,3-.