I Crystal Structure Database (Pb0.5Sn0.5)Te

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The discussion centers on finding the crystal structure of (Pb0.5Sn0.5)Te, which is noted to be similar to NaCl and belongs to Space Group 225. The user seeks information on the atomic layers closest to an X atom and their distances. They encountered access issues with a specific database but were directed to the Materials Project, which offers free access to crystal structure data. After registering, they found NaCl but are confused by the presence of two NaCl entries and are looking for Wyckoff positions for (Pb0.5Sn0.5)Te, which they could not locate. The conversation highlights the need for accessible resources for specific crystal structures in materials science.
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I would like to find the crystal structure of (Pb0.5Sn0.5)Te
I was told it is similar to NaCl basically an XY crystal
I think it is called Space Group: 225
I would like to know the first, second, third ...layer of atoms closest to a X atom...and perhaps their distance...

I found
http://materials.springer.com/isp/crystallographic/docs/sd_0380725
But it had some access control...
Is there any free-access open database available?
Thanks.
 
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CapnGranite said:
https://www.materialsproject.org/
The Materials Project

You type in the crystal structure and it generates data

Thanks. I have registered and found NaCl.
Why there are two NaCl?
Furthermore, where can I find Wyckoff positions for this guy?

It does not seems to have (Pb0.5Sn0.5)Te?
 

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