AM_Chestermanite Formula: Mg9.314 Al.66 Fe1.475 Ti.069 Sb.482 B4 O20 Name: Chestermanite Unit cell: 18.525 12.272 3.0218 90.0 90.0 90.0 , V=686.97 Space group: PBAM (55)

Alfredsson V , Bovin J O , Norrestam R , Terasaki O , Acta Chemica Scandinavica , 45 (1991) p.797-804, The structure of the mineral chestermanite,, Mg2.25Al0.16Fe0.43Ti0.02Sb0.13O2BO3. A combined single-crystal X-ray and HREM, study