أرسل هذا في رسالة قصيرة: 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

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