結(jié)晶學chap4atomicscattering-資料下載頁
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【正文】 2=U12 U13 → U13； U23 → U23 ∴ U13=U23=0 1 0 00 1 00 0 1?????????Constraint in Thermal vibration Cm ~?Cm ~?Minimum Symmetry Elements for LS Constraint Sym. Element Fixed Parameters Special Relations x, y, z, 1 1 2 x, y, u13, u23 1 1 m z, u13, u23 1 2 1 x, z, u12, u23 1 m 1 y, u12, u23 2 1 1 y, z, u12, u13 m 1 1 x, u12, u13 2 ? y, z, u22, u23 1, 4, 7 m ? y, u22, u23 2, 4, 7 2 ? y, z, u22, u23 2, 4, 6 m ? y, u22, u23 1, 4, 6 1 1 3 x, y, u22, u12, u13, u23 4, 10 1 1 4 x, y, u22, u12, u13, u23 4 x, y, z, u22, u12, u13, u23 4 3 ? ? ? y, z, u22, u33, u13, u23 1, 3, 4, 5, 8, 9 141110 possible special relations 1 y = x 2 y = ?x 3 z = x 4 u22 = u11 5 u33 = u11 6 u23 = u13 7 u23 = ?u13 8 u13 = u12 9 u23 = u12 10 u12 = (189。) u11 2 ? 2fold along (1 1 0) 2 ? 2fold along ( 1 0) m ? m ? to (1 1 0) m ? m ? to ( 1 0) 3 ? ? ? 3fold along (1 1 1) 1
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