“…[1][2][3] In addition to a range of coordination compounds, from [PPh 4 ] 4 [E′ 2 (ME 4 ) 4 ] (E′ ) Sn, M ) W, E ) S, 4 or E′ ) Sn, Pb; M ) W, Mo; E ) Se 5 ) to organometallic species such as [(CO) 6 Fe 2 (Sb 2 S 6 )][SbS 6 ] 2 ‚2SO 2 6 or [(PhSnS 3 ) 2 (CuPPhMe 2 ) 6 ], 7 several ternary or quaternary phases also attracted attention owing to novel structural, optoelectronic or magnetic properties; [8][9][10][11][12] 15 (A ) Na, K; E′ ) Ge, Sn; E ) S, Se) as synthons.…”