أرسل هذا في رسالة قصيرة: Lightweight geopolymer made of highly porous siliceous materials with various Na<inf>2</inf>O/Al<inf>2</inf>O<inf>3</inf>and SiO<inf>2</inf>/Al<inf>2</inf>O<inf>3</inf>ratios

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