Low Members of the Intergrowth Tungsten Bronze Family by Partial Substitution of Molybdenum for Tungsten

Exit wave reconstruction from focal series of HRTEM images, single crystal XRD and total energy studies on SbxWO3+y(x∼ 0.11)

“…The results clearly show that the hexagonal tunnels are not completely filled and that the Sb-content in the tunnels slightly vary from crystal to crystal. This is in agreement with previous results reported for intergrowth tungsten bronzes [28,31]. The chemical formula Sb 0.11 WO 3,11 (80% filling) gives an average oxidation state of 5.89 for tungsten.…”

Luminescent and structural properties of the series Ba6−xEuxTi2+xTa8−xO30 and Ba4−yKyEu2Ti4−yTa6+yO30

“…The basic frameworks of TB are composed of corner-sharing MO 6 octahedra that are connected to form 3-, 4-, 5-and/or 6-octahedral rings in which A-type atoms are located. Four different tungsten bronze structure types have been known so far, i.e., perovskite tungsten bronze [7,8], tetragonal tungsten bronze (TTB) [9], hexagonal tungsten bronze [10], and intergrowth tungsten bronze [11]. In these compounds, the A-type atoms are varieties of alkaline or alkaline earth elements, such as Li, K, Na, Ba, Sr, etc., while octahedral sites are those transition metal cations with high valence, such as W, Ta, Nb, Ti, Zr.…”