A transmission electron microscopic study was made of stacking faults, on the pyramidal planes, which were concurrent with twins. The faults were frequently found to inflect by more than 9º when crossing a twin domain.

Stacking Faults in the Co7W6 Isomorph of the μ Phase. P.A.Carvalho, J.T.M.De Hosson: Scripta Materialia, 2001, 45[3], 333-40