Three-tangle for high-rank mixed states
  A family of rank-n (n=5,6,7,8) three-qubit mixed states are constructed. The explicit expressions for the three-tangle and optimal decompositions for all these states are given. The CKW relations for these states are also discussed. 
Shu-Juan He, Xiao-Hong Wang, Shao-Ming Fei, Hong-Xiang Sun and   Qiao-Yan Wen
quant-ph