The misorientation dependence of the energies of [001] symmetrical tilt boundaries was determined by using a SiO2 particle observation method which avoided the drawbacks of boundary-grooving and tri-junction methods. Deep cusps were found in the energy versus misorientation diagram at  = 17 (410),  = 5 (310),  = 5 (210) and  = 17 (530). A shallow cusp was found at  = 25 (430).

T.Mori, T.Ishi, M.Kajihara, M.Kato: Philosophical Magazine Letters, 1997, 75[6], 367-70