ChemInform Abstract: Structural, Optical, and Magnetic Properties of Na8Eu2(Si2S6)2 and Na8Eu2(Ge2S6)2: Europium(II) Quaternary Chalcogenides that Contain an Ethane‐Like (Si2S6)6‐ or (Ge2S6)6‐ Moiety. Issue 26 (June 2015)