أرسل هذا في رسالة قصيرة: Formation of NaNbO3 crystals in dielectric glass and glass-ceramics of a Na2O-Nb2O5-AI 2O3-SiO2 system

 _____       ___               _    _    __   __  
|  __ \\    / _ \\    ____    | || | ||  \ \\/ // 
| |  \ ||  | / \ ||  |    \\  | || | ||   \   //  
| |__/ ||  | \_/ ||  | [] ||  | \\_/ ||   / . \\  
|_____//    \___//   |  __//   \____//   /_//\_\\ 
 -----`     `---`    |_|`-`     `---`    `-`  --` 
                     `-`