ChemInform Abstract: SYNTHESIS AND STRUCTURE OF ALUMINUM TANTALATE(V)

Abstract

AlTaO4 wird durch Umsetzung von Al2O3 mit Ta2O5 bei 1310‐1360°C (20 h) einkristallin dargestellt.

Hypothetical AlF3 crystal structures

“…The fifth one was described only as an aluminium fluoride and named t-AlF 3 [19] (it was later given another designation: y-AlF 3 [18]), which is maybe the more complex structure with intrications of tetrahedra of octahedra (as in the pyrochlore structure) and infinite chains. Two other 6-connected frameworks not known with AlF 3 formula are typified by the structures of Ca 2 TlTa 5 O 15 [20] and Ba 4 CoTa 10 O 30 [21]. It was shown that these structures can be derived from the ReO 3 type by fourling and twinning operations [22], as well as HTB and intergrowth tungsten bronze (ITB).…”

“…Table 2 gives the cell parameters predicted by GRINSP for possible AlF 3 polymorphs adopting the structures of Ca 2 TlTa 5 O 15 [20] and Ba 4 CoTa 10 O 30 [21].…”