[Pw_forum] rectangular surface of Al2O3

[Andrey Chibisov]

How to build the rectangular surface of Al2O3(0001)? 
Than, the angle between a and b parameters is 90 degrees.

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Best regards,
Andrey Chibisov. Ph.D.
Numerical method of mathematical physics Laboratory,
Computational Center, Russian Academy of Sciences.
Khabarovsk, Russia
Web page: https://www.researchgate.net/profile/A_Chibisov
http://ru.linkedin.com/pub/andrey-chibisov/55/253/986/en