AM_Carmichaelite
Formula: Ti6.83 V.12 Nb.05 Cr2.09 Fe.96 Al.36 Mg.6 O22
Name: Carmichaelite
Unit cell: 7.706 4.5583 20.187 90.0 92.334 90.0 , V=708.51
Space group: P121/C1 (14)

Wang L , Rouse R C , Essene E J , Peacor D R , Zhang Y , American Mineralogist , 85 (2000) p.792-800, Carmichaelite, a new hydroxyl-bearing titanate from Garnet Ridge, Arizona