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  ______     ___     _    _      ___      _____   
 /_____//   / _ \\  | || | ||   / _ \\   / ____|| 
 `____ `   | / \ || | || | ||  | / \ || / //---`' 
 /___//    | \_/ || | \\_/ ||  | \_/ || \ \\___   
 `__ `      \___//   \____//    \___//   \_____|| 
 /_//       `---`     `---`     `---`     `----`  
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Text this: Nanocrystalline maghemite (γ-Fe 2O 3) in silica by mechanical activation of precursors