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 __   _     ______   _    _     _____     ______  
| || | ||  /_   _// | \  / ||  |  ___||  /_   _// 
| '--' ||   -| ||-  |  \/  ||  | ||__    `-| |,-  
| .--. ||   _| ||_  | .  . ||  | ||__      | ||   
|_|| |_||  /_____// |_|\/|_||  |_____||    |_||   
`-`  `-`   `-----`  `-`  `-`   `-----`     `-`'

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Text this: Phase and morphology evolution of corundum-type Ni<inf>4</inf>Nb<inf>2</inf>O<inf>9</inf>powders synthesized by solid-state reaction