No abstract

A new phase in europium-tin-chalcogenide chemistry has been prepared using the reactive flux method: Eu 8 -(Sn 4 Se 14 )(Se 3 ) 2 . The compound crystallizes in the orthorhombic space group P2 1 2 1 2 with cell parameters a = 11.990(2) A Ê , b = 16.425(4) A Ê , c = 8.543(1) A Ê , and Z = 2. Eu 8 (Sn 4 Se 14 )-(Se 3 ) 2 is a three dimensional structure with Eu II cations linked together with an unusual (Sn 4 Se 14 ) 12± anionic unit and (Se 3 ) 2± chains. UV-VIS-NIR band-gap analysis shows that these black metallic crystals are likely semiconductors with an optical band-gap of 1.07 eV.

No abstract

No abstract