<div dir="ltr"><div class="gmail_default" style="font-family:'arial narrow',sans-serif">Dear Shinji,</div><div class="gmail_default" style="font-family:'arial narrow',sans-serif"><br></div><div class="gmail_default" style="font-family:'arial narrow',sans-serif">Thank you very much for your kind message.</div><div class="gmail_default" style="font-family:'arial narrow',sans-serif">I already encountered some of the difficulties and that is very interesting! I will write you an e-mail. Thank you.</div><div class="gmail_default" style="font-family:'arial narrow',sans-serif"><br></div><div class="gmail_default" style="font-family:'arial narrow',sans-serif">best regards,</div><div class="gmail_default" style="font-family:'arial narrow',sans-serif">Philipp Hans from Vienna UT</div><div class="gmail_default" style="font-family:'arial narrow',sans-serif"><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">2016-06-01 5:13 GMT+02:00 <a href="mailto:kohara@spring8.or.jp">kohara@spring8.or.jp</a> <span dir="ltr"><<a href="mailto:kohara@spring8.or.jp" target="_blank">kohara@spring8.or.jp</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Dear Philipp,<br>
<br>
I think Amorphous SiO2 is one of difficult targets with RMC.<br>
There are some relatively new reports by Dave and Andrew.<br>
I have also been working on this topic and I have some recent results<br>
with<br>
a combination with classical MD, DFT, and DF-MD.<br>
I also have good quality x-ray and neutron diffraction data.<br>
<br>
I will contact you later, because I am away from the office.<br>
<br>
Now I am also planning to visit you, because I am in Graz!<br>
<br>
Best regards,<br>
<br>
Shinji Kohara of NIMS<br>
<br>
----- Original Message -----<br>
> Dear all,<br>
><br>
> Since longer, I'm keeping myself busy with substances that consist<br>
partly<br>
> or fully of amorphous SiO2 or modifications of it for my dissertation.<br>
> In the last time we tried to get some starting structures for<br>
> rmc-calculations. We tried to distribute Si-Atoms and O-Atoms in space<br>
and<br>
> afterwards loop over the system to get bonding angles correct. I also<br>
have<br>
> other ideas but still have to think how to implement them.<br>
> Anyway, the supercells we created till now are lacking e.g.<br>
homogeneous<br>
> density. So we didn't even start a potentially following<br>
> bond-switching-algorithm to get the structure more and more randomised.<br>
> I don't know if those procedures are kept secret or if I simply did a<br>
too<br>
> bad search in literature - I didn't find much. There are some programs<br>
one<br>
> could buy that are said of being able to solve the task using e.g.<br>
> molecular dynamics. But majoritarily they seem sort of expensive or<br>
> unpriced. So I hoped that I would be able to do it myself.<br>
><br>
> Does someone of you want to talk with me about this interesting topic<br>
or<br>
> can give me a hint to adequate literature? - I would be happy about<br>
this.<br>
><br>
> best regards,<br>
> Philipp<br>
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