Enantiomorph identification and stacking faults in κ-(BEDT-TTF)₂Cu(NCS)₂ by convergent-beam electron diffraction

The enantiomorphs of an ambient-pressure superconductor κ-(BEDT-TTF)₂Cu(NCS)₂ [BEDT-TTF is bis­(ethyl­ene­dithio)­tetra­thia­fulvalene] have been successfully identified using the method of convergent-beam electron diffraction. This indicates that a micrometre-sized small crystallite is enough to identify its enantiomorphs even in an organic crystal. Stacking faults in κ-(BEDT-TTF)₂Cu(NCS)₂ have also been found, the existence of which has not been noted from conventional X-ray diffraction methods.