AM_Aristarainite Formula: Mg Na2 B12 O28 H16 Name: Aristarainite Unit cell: 18.886 7.521 7.815 90.0 97.72 90.0 , V=1099.99 Space group: P121/A1 (14)

Ghose S , Wan C , American Mineralogist , 62 (1977) p.979-989, Aristarainite: Na2Mg[B6O8(OH)4]2.4H2O: a sheet structure with chains of, hexaborate polyanions