Na (W6 N Cl18)

Cl₁₈NNaW₆

Welch, E.J.Yu, C.L.Crawford, N.R.M.Long, J.R.

Angew. Chem. Int. ed. (2005) 44, 2549-2553

a=8.836Å   b=8.836Å   c=17.84Å

α=90°   β=90°   γ=120°