title: Rosenbergite
text: Rosenbergite is a mineral with the chemical formula AlF3·3H2O.  It is a trihydrate of aluminium fluoride.
  
  It is colorless. Its crystals are tetragonal to dipyramidal. It is named after Philip E. Rosenberg, a United States geochemist. It is found in the Celtine Mine in Tuscany, Italy and Mount Erebus, Ross Island, Antarctica. It is not radioactive. Rosenbergite is rated 3–3.5 on the Mohs Scale.
  
  References
  
  External links
  Webmineral - Rosenbergite
  Mindat.org - Rosenbergite
  Handbook of Mineralogy - Rosenbergite
  
  Aluminium minerals
  Fluorine minerals
  Tetragonal minerals
  Minerals in space group 85