Hi, Mohammad!

Here are the databases I use, depending on what I am looking for:

American Mineralogist Crystal Structure Database (AMCSD): mineral structures, obviously ;) (free)Cambridge Structural Database (CSD): organic crystal structures (license required)

Crystallography Open Database (COD): all(?) types of crystal structures (free)

Inorganic Crystal Structure Database (ICSD): (mainly) inorganic crystal structures (license required)

I believe you will find what you are looking for in AMCSD and COD, and both databases are free. It is possible to request known deposited structures from the other two, but if you are looking for something in particular and cannot find it in the free ones just reply here and I am sure someone will help you (eventually). The websites for these two databases are:

AMCSD:

COD:

Good luck "structure hunting"!

regards,

Daniel

Hi Daniel, Thanks. It was very useful. But I could not find some structures, for example Al2O3 (Aluminium oxide) or Alumina is not available in AMCSD or COD.

I mean, Al2O3 is corundum, sapphire, ruby... It would be VERY surprising if this phases is not given even by multiple descriptions in AMCSD. Or are you looking for another modification?

I was just looking: already corundum gives 25 matches is AMCSD.

Thanks Mr. Gert Nolze!

I think i was searching wrong phrase! Now corundum works but still AMCSD dose not have any matches for Ruby or Sapphire.

Can you make it a little bit more clear to me? I'm new to crystallography science.

according to wikipedia all of these are Aluminium oxide's names. but why only corundum is available in the databases?

Thanks

By the way, there is a great android app which will help in finding different information about minerals, including crystallographic properties. BUT it dose not have atomic configurations in the lattice.

ruby and sapphire are the same as corundum. They only has some trace elements a color centers.