Citation: Ferraris, G.; Gula, A.; Ivaldi, G.; Nespolo, M.; Raade, G. (2001). Crystal structure of kristiansenite: a case of class IIB twinning by metric merohedry Locality: amazonite pegmatite, Heftetjern, Tordal, Telemark, Norway. Zeitschrift fur Kristallographie, 216, pp. 442-448.