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holisky

新虫 (小有名气)

[求助] 这些对称操作是什么意思

大家好,我近期用个小软件分析一个晶体结构的对称操作,出来下面的结果,不太明白是什么意思,希望行家能给些指示,如下:

Tol=0.002 24 symmetry operations found.
1  axis along (-0.000,-0.000, 1.000) through (0,0,0)
4_1 axis along ( 0.000, 0.000, 1.000) through (-0.250000,0.500000,-0.000000)
2_1 axis along ( 0.000, 0.000, 1.000) through (0.250000,0.000000,-0.000000)
4_3 axis along ( 0.000, 0.000, 1.000) through (0.250000,0.000000,-0.000000)
2_1 axis along ( 1.000, 0.000, 0.000) through (-0.000000,0.250000,0.000000)
2  axis along ( 1.000,-1.000, 0.000) through (0.375000,0.375000,0.375000)
2_1 axis along ( 0.000, 1.000, 0.000) through (0.000000,-0.000000,0.250000)
2_1 axis along ( 1.000, 1.000, 0.000) through (0.125000,-0.125000,0.125000)
3  axis along ( 1.000, 1.000, 1.000) through (0,0,0)
2_1 axis along ( 1.000, 0.000, 1.000) through (-0.125000,0.125000,0.125000)
3  axis along ( 1.000,-1.000, 1.000) through (0.333333,0.166667,-0.166667)
4_1 axis along (-0.000, 1.000, 0.000) through (0.500000,-0.000000,-0.250000)
3  axis along (-1.000,-1.000, 1.000) through (-0.166667,0.333333,0.166667)
2  axis along (-1.000, 0.000, 1.000) through (0.375000,0.375000,0.375000)
3  axis along (-1.000, 1.000, 1.000) through (0.166667,-0.166667,0.333333)
4_3 axis along (-0.000, 1.000, 0.000) through (-0.000000,-0.000000,0.250000)
3  axis along ( 1.000, 1.000, 1.000) through (0,0,0)
4_3 axis along ( 1.000, 0.000, 0.000) through (-0.000000,0.250000,0.000000)
3_1 axis along (-1.000, 1.000, 1.000) through (0.166667,0.166667,0.000000)
2_1 axis along (-0.000, 1.000, 1.000) through (0.125000,0.125000,-0.125000)
3_1 axis along ( 1.000,-1.000, 1.000) through (0.000000,0.166667,0.166667)
2  axis along ( 0.000,-1.000, 1.000) through (0.375000,0.375000,0.375000)
3_2 axis along (-1.000,-1.000, 1.000) through (0.166667,0.000000,0.166667)
4_1 axis along ( 1.000, 0.000, 0.000) through (-0.000000,-0.250000,0.500000)

前面的数字如4_1不太清楚是什么意思,旋转轴吗?为什么只有旋转对称?through后的坐标也不太清楚什么意思,晶体结构里的原子没有这些坐标,而且这些坐标貌似是较规则的位置,数字基本是0、1/2、1/4、1/6、3/8等等。

该怎么看这些结果呢?

谢谢!
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holisky

新虫 (小有名气)

引用回帖:
2楼: Originally posted by 我想更懂你29 at 2016-12-17 15:01:59
这是什么软件啊

cellsym,开源的
3楼2016-12-17 17:00:36
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我想更懂你29

专家顾问 (文坛精英)

以大多数人的努力程度,还轮不到去拼天赋的地步
2楼2016-12-17 15:01:59
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life2000

木虫 (小有名气)

4楼2016-12-18 08:43:45
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holisky

新虫 (小有名气)

引用回帖:
4楼: Originally posted by life2000 at 2016-12-18 08:43:45
真不错,帮顶

谢帮顶!
5楼2016-12-18 15:39:03
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