Citation: Cooper, M. A.; Hawthorne, F. C.; Ball, N. A.; Cerny, P.; Kristiansen, R. (2006). Oftedalite, (Sc,Ca,Mn2+)2 K (Be,Al)3 Si12 O30, a new member of the milarite group from the Heftetjern pegmatite, Tordal, Norway: description and crystal structure. The Canadian Mineralogist, 44, pp. 943-949.