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Different adsorption sites on the Fe0(001), Fe0(110) and Fe0(111) crystal surfaces. A is a top site, B is a bridge site, C is a 4-fold hollow site, D is a long bridge site, E is a 3-fold hollow site, F is a short bridge site, G is an fcc site, H is an hcp site, I is a top-fcc site, J is a top-hcp site, and K is a hollow site.
