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Twinning in YNbO 4
Author(s) -
Quinn Candace,
Wusirika Raja
Publication year - 1991
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1991.tb06902.x
Subject(s) - monoclinic crystal system , crystal twinning , tetragonal crystal system , materials science , crystallography , phase (matter) , mineralogy , crystal structure , metallurgy , chemistry , microstructure , organic chemistry
The compound YNbO 4 is a 3–5 analogue of ZrO 2 with two polymorphs: low‐temperature monoclinic and high‐temperature tetragonal forms. YNbO 4 powder with a surface area of 40 m 2 /g was prepared from citrate complexes. The powder sintered to theoretical density at 1550°C. Unlike pure ZrO 2 , YNbO 4 can be cooled through the tetragonal‐to‐monoclinic phase transformation without cracking. The phase transformation is gradual and takes place by shear, resulting in twinning.