Five ternary zintl phases in the systems alkali-metal-indium-bismuth

被引:13
作者
Bobev, S [1 ]
Sevov, SC [1 ]
机构
[1] Univ Notre Dame, Dept Chem & Biochem, Notre Dame, IN 46556 USA
关键词
crystal structures; intermetallic compounds; indium; bismuth; Zintl phases;
D O I
10.1006/jssc.2001.9423
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Five new compounds of alkali metal, indium, and bismuth were synthesized by direct fusion of the elements. The structures of these compounds, Na3In2Bi3 (I) (refined composition NaIn0.61(1)Bi, orthorhombic, Pnma, a = 8.062(2), b = 4.8684(8), and c = 9.2455(9) Angstrom), Na3InBi2 (II) (monoclinic, P2(1)/c, a = 18.841(3), b = 9.235(1), and c = 12.661(2) Angstrom, beta = 98.67(2)degrees), K(7)ln(4)Bi(6) (III) (refined composition K4.71(3)In2.52(2)Bi4, tetragonal, P4(3,) a = 9.703(1), and c = 17.519(4) Angstrom), K11In6Bi9 (IV) (triclinic, P (1) over bar, a = 12.012(7), b = 13.380(4), and c = 13.695(4) Angstrom, alpha = 76.70(2), beta = 64.14(3), and gamma = 75.68(3)degrees), and Rb7In4Bi6 (V) (tetragonal, P4(3), a = 9.915(2) and c = 17.870(4) Angstrom) are built of indium-centered tetrahedra of bismuth that are connected by corner- or/and edge-sharing and form different types of three-dimensional networks. All five compounds are diamagnetic and, therefore, electronically balanced, salt-like Zintl phases. According to EHMO calculations they are wide band-gap semiconductors. (C) 2002 Elsevier Science.
引用
收藏
页码:436 / 448
页数:13
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