Gruppo degli ossi-anfiboli

Il gruppo degli ossi-anfiboli è un gruppo di minerali facente parte del supergruppo dell'anfibolo definito dall'IMA nel 2012[1].

Gli ossi-anfiboli sono definiti come quelli che in posizione W presentano una dominanza dell'anione O2− rispetto ad ((OH)+F+Cl)2− in base alla formula chimica generale AB2C5T8O22W2[2].

La nomenclatura del 2012 prevede che le specie appartenenti a questo gruppo aventi un "rootname" corrispondente già classificato nel gruppo degli idrossi-fluoro-cloro-anfiboli siano caratterizzate dal prefisso oxo- come per esempio l'oxo-magnesio-hastingsite[2].

Gli unici anfiboli appartenenti a questo gruppo con una certa diffusione sono quelli aventi "rootname" kaersutite[2].

I minerali che fanno parte di questo gruppo sono i seguenti:

Note

  1. ^ Hawthorne, p. 2045.
  2. ^ a b c Hawthorne, pp. 2039-2040.
  3. ^ a b c d e f Hawthorne, p. 2040.
  4. ^ Zaitsev, p. 2774.
  5. ^ Williams, p. 1248.

Bibliografia

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