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

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Text this: Structure and magnetic properties of K2NiFe3.5v 3.5O16 with the hollandite structure