AM_Okayamalite Formula: Ca2 Si B2 O7 Name: Okayamalite Unit cell: 7.1248 7.1248 4.8177 90.0 90.0 90.0 , V=244.56 Space group: P-421M (113)

Giuli G , Bindi L , Bonazzi P , American Mineralogist , 85 (2000) p.1512-1515, Rietveld refinement of okayamalite, Ca2SiB2O7: Structural evidence for the, B/Si ordered distribution