K<sub>1.10</sub>Zr<sub>2</sub>Se<sub>6</sub>, Rb<sub>0.86</sub>Zr<sub>2</sub>Se<sub>6</sub> and Cs<sub>0.80</sub>Zr<sub>2</sub>Se<sub>6</sub>. The First Intercalation Compounds of Zirconium Triselenide
Abstrak
Single crystals of K1.10Zr2Se6, Rb0.86Zr2Se6 and Cs0.80Zr2Se6 were obtained by reacting powdered mixtures of A2Se (A = K, Rb, Cs), Zr and Se at 850 °C. K1.10Zr2Se6 and Rb0.86Zr2Se6 crystallize in space group Immm (Z = 2), with a = 3.746(3), b = 5.354(8), c = 21.929(3) Å and a = 3.756(1), b = 5.354(8), c = 22.81(1) Å , respectively. Cs0.80Zr2Se6 crystallizes in space group Cmc21 (Z = 2), with a = 3.747(1), b = 24.102(5), c = 5.332(2) Å. The compounds are characterized by complex anionic layers 2 ∞[Zr2Se6]x- with intercalated alkali cations. As in ZrSe3, the layers are built from columns of trigonal prisms 1 ∞[ZrSe3], connected by additional waist contacts, yielding an eightfold coordination for the Zr atoms. The mean Zr-Se bond lengths correspond to those found in the binary compound. The Se-Se bond lengths are significantly altered, however, indicating a reduction of the Se-Se bond order due to the electron transfer from the alkali metal.
Penulis (3)
Kurt O. Klepp
Norbert A. Harringer
Andreas Kolb
Format Sitasi
Akses Cepat
- Tahun Terbit
- 2002
- Bahasa
- en
- Total Sitasi
- 5×
- Sumber Database
- CrossRef
- DOI
- 10.1515/znb-2002-1111
- Akses
- Terbatas