[Wien] software for molecule building

[Chandrika]

Hello,
I want to build supercells with two unlike materials placed one on top of the other (eg a metal with a layer of oxide). 
Could you recommend a software that can generate Wien-compatible structure files.
Thank you for your suggestions.
Chandrika
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Dr (Ms) Chandrika Varadachari
Raman Centre for Applied and Interdisciplinary Sciences
16 A Jheel Road
Calcutta 700075
India

Tel : 91-33-24830029
Fax 91-33-24180610
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