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Stick and ball representation of ZnO crystal structures: (a) cubic rocksalt (B1), (b) cubic zinc blende (B3), and (c) hexagonal wurtzite (B4). The shaded grey and black spheres denote Zn and O atoms, respectively. Reprinted from [97], with the permission of John Wiley & Sons, Inc. Copyright 2009. All rights reserved. In order to re-use permission must be obtained from the rightsholder.
