Co2Cl6(NH3)12

from The Collaborative International Dictionary of English v.0.48

Luteocobaltic \Lu"te*o*co*balt"ic\, a. (Chem.)
   Pertaining to, or designating, certain compounds of cobalt
   having a yellow color. Cf. {Cobaltic}.
   [1913 Webster]

   {Luteocobaltic chloride} (Chem.), a brilliant reddish yellow
      crystalline compound, {Co2Cl6(NH3)12}, obtained by the
      action of ammonium chloride on an ammoniacal solution of
      cobaltic chloride.
      [1913 Webster]