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In the context of molecular symmetry, a symmetry operation is a permutation of atoms such that the molecule or crystal is transformed into a state indistinguishable from the starting state. Two basic facts follow from this definition, which emphasize its usefulness. # Physical properties must be invariant with respect to symmetry operations. # Symmetry operations can be collected together in groups which are isomorphous to permutation groups. Wavefunctions need not be invariant, because the operation can multiply them by a phase or mix states within a degenerate representation, without affecting any physical property. == Molecules == 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「symmetry operation」の詳細全文を読む スポンサード リンク
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