Abstract
An unusual pseudo-two-dimensional polytelluride built up from Te2-12 anions was synthesized electrochemically from the cathodic dissolution reaction of an SbTe10 alloy electrode in an ethylenediamine solution of tetraethylammonium iodide, and represents the largest homoatomic polychacogenide anion characterized to date. The compound [(C2H5)4N]2Te12 crystallizes in the acentric monoclinic space group Pn (No. 7) with lattice constants of a = 7.934(1), b = 17.453(8) and c = 13.514(1) Å, β = 104.671(10)° and V = 1810.4(7) Å3, with Z = 2 and R(Rw) = 0.036(0.047). The structure consists of puckered Te2-12 chains, with internal Te-Te distances of 2.713(2)-2.881(2) Å, loosely bound into infinite two-dimensional sheets via many Te-Te interactions in the range of 3.144(2)-3.504(2) Å. These distances are somewhat shorter than the comparable interchain (2.835(2) Å) and intrachain (3.495(3) Å) Te-Te distances in elemental Te. The complete structure consists of these tellurium layers separated in the crystallographic b direction by layers of tetraethylammonium cations.
Original language | English (US) |
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Pages (from-to) | 23-29 |
Number of pages | 7 |
Journal | Journal of Alloys and Compounds |
Volume | 233 |
Issue number | 1-2 |
DOIs | |
State | Published - Jan 15 1996 |
All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry
Keywords
- Electrochemical synthesis
- [(CH)N]Te