Andreas Kolb, Kurt O. Klepp,
"K4Ti3Te9 - A New Pseudo One-Dimensional Polyanionic Alkali Chalcogenometallate(IV)"
, in Zeitschrift für Naturforschung B: A Journal of Chemical Sciences, Vol. 58, Nummer 7, Seite(n) 633-638, 7-2003, ISSN: 0932-0776, A. Kolb, K. O. Klepp; K4Ti3Te9 - A New Pseudo One-Dimensional Polyanionic Alkali Chalcogenometallate(IV); Z. Naturforsch. 58b (2003) 633
Original Titel:
K4Ti3Te9 - A New Pseudo One-Dimensional Polyanionic Alkali Chalcogenometallate(IV)
Sprache des Titels:
Englisch
Original Kurzfassung:
Lustrous black needle shaped single crystals of K4Ti3Te9 were obtained by reacting K2Te with
the corresponding elemental components at 1000 ◦C. K4Ti3Te9 is monoclinic, mP64, s. g. P21/c
(No. 14), Z = 4 with a = 9.052(2), b = 8.088(1), c = 29.465(9) ° A, β= 92.35(1)◦. The crystal structure
was determined from diffractometer data and refined to a conventional R value of 0.035 (2840 Fo’s, 146 variables). The compound contains undulating polyanionic chains built up by severely distorted TiTe6 octahedra sharing opposite faces which run parallel to [100] and are arranged in a
hexagonal rod packing. The translation period comprises three octahedra. The most striking feature of this compound is the formation of two ditelluride groups per formula unit with unusually long Te-Te distances of 2.960(2) and 3.025(2) ° A, respectively. All other Te-Te distances start at 3.2 ° A.
The nearest homonuclear neighbours of the two pairs are at 3.215(2) and 3.333(2) ° A apart. Ti-Te bond lengths range from 2.700(3) to 2.841(3) ° A with an average value of 2.772(4) ° A for all three crystallographically independent titanium atoms. The alkali cations are irregularly coordinated by 7 to 9 tellurium atoms.
Sprache der Kurzfassung:
Englisch
Journal:
Zeitschrift für Naturforschung B: A Journal of Chemical Sciences
Volume:
58
Number:
7
Seitenreferenz:
633-638
Erscheinungsmonat:
7
Erscheinungsjahr:
2003
Notiz zum Zitat:
A. Kolb, K. O. Klepp; K4Ti3Te9 - A New Pseudo One-Dimensional Polyanionic Alkali Chalcogenometallate(IV); Z. Naturforsch. 58b (2003) 633
Forschungs-