%0 Journal Article
%T Ternary Compounds in the Sn-Rich Section of the Ba每Ga每Sn System: Ba8Ga16每xSn30+x (1.1 ≒ x ≒ 2.8) Clathrates of Type-I andˋType-VIII, and BaGa2每xSn4+x (x ＞ 0.2) with a Clathrate-like Structure
%A Marion C. Schˋfer
%A Yuki Yamasaki
%A Veronika Fritsch
%A Svilen Bobev
%J Crystals
%D 2011
%I MDPI AG
%R 10.3390/cryst1030145
%X Systematic syntheses in the Ba每Ga每Sn system confirmed the existence of a new ternary phase BaGa 1.79Sn 4.21(2) (EuGa 2Ge 4 structure type; orthorhombic space group Cmcm, Pearson symbol oS28) with lattice parameters a = 4.5383(6) ˋ, b = 12.2486(16) ˋ, c = 14.3747(19) ˋ. The structure is best viewed as an open-framework based on tetrahedrally coordinated Sn/Ga atoms with Ba atoms enclosed in the voids within it. The new phase co-precipitates with two other compounds with very similar compositions〞Ba 8Ga 14.5Sn 31.5(4) (K 4Si 23 structure type; cubic space group , Pearson symbol cP54; a = 11.6800(12) ˋ), and Ba 8Ga 13.2Sn 32.8(3), (Eu 4Ga 8Ge 15 structure type; cubic space group , Pearson symbol cI54; a = 11.5843(7) ˋ). Detailed discussion on how syntheses affect the crystal chemistry, and the temperature dependence of the atomic displacement parameters, obtained from single-crystal structure refinements, are also reported in this article.
%K clathrate type-I
%K clathrate type-VIII
%K barium
%K gallium
%K tin
%K crystal structure
%U http://www.mdpi.com/2073-4352/1/3/145