Open AccessPolymorphism in potassium niobate, sodium niobate, and other AB O 3 compounds
Author(s) -
Wood E. A.
Publication year - 1951
Publication title -
acta crystallographica
Language(s) - Portuguese
Resource type - Journals
ISSN - 0365-110X
DOI - 10.1107/s0365110x51001112
Subject(s) - lithium niobate , potassium niobate , potassium , sodium , polymorphism (computer science) , materials science , chemistry , crystallography , optoelectronics , metallurgy , genotype , gene , biochemistry , ferroelectricity , dielectric
T h e f i rs t p a r t o f th i s p a p e r p r e s e n t s t h e resu l t s o f op t i ca l a n d X r a y s t ud i e s o f t h e p e r o v s k i t e t y p e crys ta ls , p o t a s s i u m n i o b a t e a n d s o d i u m n i o b a t e . P o t a s s i u m n i o b a t e is o r t h o r h o m b i c a t r o o m t e m p e r a t u r e , c h a n g i n g to t e t r a g o n a l a t a b o u t 225 ° C. a n d cub ic n e a r 435 ° C. S o d i u m n i o b a t e is o r t h o r h o m b i c a t r o o m t e m p e r a t u r e , c h a n g i n g to t e t r a g o n a l a t a b o u t 370 ° C. a n d to cub ic a t a b o u t 640 ° C. T h e s e c o n d p a r t o f t h e p a p e r d iscusses r e l a t ions a m o n g t h e s t r u c t u r e s o f t h e AB03 c o m p o t m d s .