AM_Beryl_26
Formula: Si6 Be3 (Al1.97 Fe.03) O18.24 Na.016 H.26
Name: Beryl
Unit cell: 9.218 9.218 9.197 90.0 90.0 120.0 , V=676.78
Space group: P6/MCC (192)

Artioli G , Rinaldi R , Stahl K , Zanazzi P F , American Mineralogist , 78 (1993) p.762-768, Structure refinements of beryl by single-crystal neutron and X-ray diffraction, Sample no. 2, aquamarine, probed with neutrons, T = 295 K