Synthesis and structure determination of In3TeO3F7: An indium oxyfluorotellurate IV derived from W bronze structure with Te4+ in hexagonal tunnels

Structural investigation of tungsten bronze-type relaxor ferroelectrics in the BaxSr3−xTiNb4O15system

“…Compounds that form with tungsten bronze-type structures have been investigated extensively because of their technologically important properties. They have been shown to display non-linear optical behaviour as well as ferroelectric, pyroelectric, and piezoelectric properties (Yuan et al , 2005; Massarotti et al , 2006; Ko and Kojima, 2010; Jennene Boukharrata and Laval, 2011; Nair et al , 2011). These properties allow tungsten bronze-type compounds to be used in, for example, memory storage, oscillator devices, phase-conjugated mirrors, as well as in infrared-radiation detectors.…”

A new oxyfluorotellurate(IV), InTe2O5F

“…In the In-Te-O-F system, two new structure types have been described previously, viz. InTeO 3 F (Jennene and In 3 TeO 3 F 7 (Jennene Boukharrata et al, 2011). In the present work, we report the synthesis and crystal structure determination of a new oxyfluorotellurate(IV) which is richer in tellurium, namely InTe 2 O 5 F.…”

“…Tellurates(IV) and selenates(IV) have attracted attention becuase of their ability to adopt a variety of structures in which the lone electron pair of the Te IV and Se IV cations may act as a structure-guiding agent (Berdonosov et al, 2009). Recently, the crystal structures of several oxyfluorotellurates(IV) showing a wide structural diversity [MTeO 3 F (M = Fe III , Ga III and Cr III ;Laval et al, 2008), ScTeO 3 F and InTeO 3 F (Jennene , In 3 TeO 3 F 7 (Jennene Boukharrata et al, 2011), and V 2 Te 2 O 7 F 2 and TiTeO 3 F 2 (Laval et al, 2009)] have been described. The common characteristic of these structures is the presence of TeO 3 E pyramids, where E represents a lone pair.…”

Synthesis and Magnetic Properties of the Ternary Oxofluoride Fe3Sb4O6F6

“…[16] Only a relatively small number of oxofluorides comprising lone pair elements have been reported, so far. [1,[17][18][19][20][21][22][23][24] Most oxochlorides and oxobromides containing lone-pair cations have been synthesized at high temperatures by solid state reactions. One of the major obstacles in the synthesis of fluorides is the reactivity of fluorine and the corrosion of silica ampoules in high temperature solid state reactions and consequently, it often remained challenging to obtain single-phase products for the investigation of physical properties, even if gold or platinum ampoules are utilized additionally.…”

“…Only a relatively small number of oxofluorides comprising lone pair elements have been reported, so far. Examples are (Co 1–x Ni x ) 3 Sb 4 O 6 F 6 (0 ≤ x ≤ 1), FeSbO 2 F 2 , FeSeO 3 F, V 2 Te 2 O 7 F 2 , In 3 TeO 3 F 7 , FeTeO 3 F, YSeO 3 F, FePbO 2 F, Co 2 SeO 3 F 2 , Co 2 TeO 3 F 2 and Bi 4 Fe 5 O 13 F, Zn 3 Sb 4 O 6 F 6 , . Most oxochlorides and oxobromides containing lone‐pair cations have been synthesized at high temperatures by solid state reactions.…”