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           __   __    _____     ______            
    ___    \ \\/ //  |__  //   /_   _//   ____    
   /   ||   \ ` //     / //     -| ||-   |    \\  
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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