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小小正钛

铜虫 (小有名气)

[求助] 除了用超晶胞,还有别的方法对置换固溶体进行建模么?或者别的软件来实现?

研究三元的合金体系,体心立方,Ti Nb Mo在格点出现的几率分别为 76% 20% 4%

查了很多文献,对建模方面都略过去了,不知道怎么实现的,如果超晶胞,这个计算量也太大了吧?
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小小正钛

铜虫 (小有名气)

送鲜花一朵
引用回帖:
Originally posted by xujc1983 at 2011-07-06 17:09:23:
我都让你搞糊涂了,这个应该一想就明白的啊!
首先,你的问题是添加原子的问题。某个位置已经有了一个原子,不管你再添加一个什么样的原子,都不可能在同样的位置添加啊。所以你要新加一个原子,肯定要把坐标 ...

谢谢,ms里的帮助文件看到了,就是这么做的

many thanks!!!


Creating and editing mixture atoms
Mixture atoms may be used to simulate the case where one atomic site is randomly occupied by two or more different types of atom. Materials Studio allows you to create mixtures of different elements, oxidation states and isotopes.

To edit the selected atoms as mixture atoms

Choose View | Explorers | Properties Explorer and select one or more atoms.
Double-click on the IsMixtureAtom property to display the Edit Mixture Atom dialog.
To edit a component of the mixture atom

Highlight the appropriate component in the list and click on the Edit button to display the Edit Mixture Component dialog.
To change the element type you may either type the element symbol directly into the box, select an element from the dropdown list, or click the button to display the periodic table.
To change the isotope, select the desired mass number from the list of known isotope in the dropdown list. Natural refers to the element having an isotopic mixture in naturally occurring abundances.
To change the composition, enter a value between 0.0 and 100.0 in the box. Note that the total composition of all components must add up to 100% and so it may be necessary to adjust the compositions of other components. Materials Studio will perform a scaling for you, but the results may be undesirable.
To change the oxidation state, enter the value between -5 and +8 in the box, or use the spin control.
To add a component to the mixture atom

Click the Add button to display the Edit Mixture Component dialog and follow steps 2-5 above.

To delete a component of the mixture atom

Select the component to be deleted in the list, and then click the Delete button.

Further information
About disorder
Edit Mixture Component dialog
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10楼2011-07-06 20:24:00
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zjuer

至尊木虫 (著名写手)


uuv2010(金币+1): 多谢提示 2011-07-06 10:38:41
建模的时候add atoms的atom选项卡的occupancy就是占据几率的,可以实现你的要求。
2楼2011-07-06 08:32:34
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xujc1983

木虫 (著名写手)

苦逼青椒一枚

【答案】应助回帖


小小正钛(金币+2): 谢谢,我仍然还是不知道怎么建模,具体的步骤不清楚…… 2011-07-06 09:09:37
youzhizhe(金币+1): 谢谢交流。 2011-07-06 13:07:13
引用回帖:
Originally posted by zjuer at 2011-07-06 08:32:34:
建模的时候add atoms的atom选项卡的occupancy就是占据几率的,可以实现你的要求。

但是这种虚拟晶胞的方法,有很多性质是无法计算的
3楼2011-07-06 08:37:33
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小小正钛

铜虫 (小有名气)

引用回帖:
Originally posted by zjuer at 2011-07-06 08:32:34:
建模的时候add atoms的atom选项卡的occupancy就是占据几率的,可以实现你的要求。

我不知道是版本(MS 5.0)不对还是方法不对
修改占位率 总提示我

Chosen position would leave the new atom superimposed on an existing atom.
Please choose another coordinate.
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4楼2011-07-06 09:02:38
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