Re6Q8(SO3)610- (Q = S or Se): Facile Synthesis and Properties of the Most Highly Charged Octahedral Cluster Complexes and High Magnetic Relaxivity of Their Colloids with Gd3+ Ions - Brylev, Konstantin A; Akhmadeev, Bulat S; Elistratova, Julia G; Nizameev, Irek R; Gubaidullin, Aidar T; Kholin, Kirill V; Kashnik, Ilya V; Kitamura, Noboru; Kim, Sung-Jin; Mironov, Yuri V; Mustafina, Asiya R (Inorganic chemistry, 2019)