ELECTROCHEMICAL SYNTHESIS OF A NEW INDIUM TELLURIDE CONTAINING ONE-DIMENSIONAL CHAINS - STRUCTURE OF [(N-C4H9)4N]2IN2TE4

A new indium telluride, [(n-C4H9)4N]2In2Te4, has been synthesized at r oom temperature by the cathodic dissolution of an In2Te5 alloy electro de in an ethylenediamine solution of tetrabutylammonium iodide. The ti tle compound is characterized by single-crystal X-ray diffraction at - 120-degrees-C and crystallizes in the monoclinc space group P2(1)/c (N o. 14) with a = 14.86(2), b = 15.740(4), c = 18.262(4) angstrom, beta = 96.48(6)-degrees, V = 4243(3) A3, and Z = 4 with R (R(w)) = 0. 038 ( 0.040) for 3409 reflections (I > 3sigma(I)) and 356 variables. The str ucture consists of one-dimensional (In2Te4)2- chains which run paralle l to the crystallographic a axis and are separated by tetrabutylammoni um cations. The (In2Te4)2- chains are isotypic to the chains found in the SiS2 and KFeS2 structure types. (C) 1994 Academic Press, Inc.