Effect of oxide additions on the polymorphism of tantalum pentoxide. III. ""Stabilization"" of the low temperature structure type

Abstract

Th e " low te mperature stru cture type" of Ta, O. has bee n found to occur in two di stin c t forms with th e lowes t te mp e rature form hav in g a unit cell 14 tim es th e s ub ce ll a nd an inte rm ed ia ,e te mlJe ra ture form with a unit ce ll 11 tim es the subcell. Th e two t ypes form inte rm ediate partially ord ered mixtures which are appare ntl y in th e rmal equilibrium at various te mp e ratu res be twee n -1000 and 1350 C.