AM_Na58Ag18Mg212Al698B3Si590O2753OH3F47
Formula: Na.58 Ag.18 Al6.981 Mg2.121 Si5.898 B3 O30.53 F.47 H6.53
Name: Na.58Ag.18Mg2.12Al6.98B3Si5.90O27.53OH3F.47
Unit cell: 15.8995 15.8995 7.1577 90.0 90.0 120.0 , V=1567.01
Space group: R3M (160)

London D , Ertl A , Hughes J M , Morgan VI G B , Fritz E A , Harms B S , American Mineralogist , 91 (2006) p.680-684, Synthetic Ag-rich tourmaline: Structure and chemistry, Note: Y(B) adjusted to satisfy symmetry constraint