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I'd like to understand the atomic arrangement is on a silver (111) surface.

Step 1 would be to find out the bulk crystal structure.

Wikipedia lists silver as face-center cubic (fcc) here and here and the page Silver: crystal structures also shows fcc and links to Lin-gun Liu and W. A. Bassett, J. Appl. Phys., 1973, 44, 1475:

silver crystal structure

But the page Ag(111) and Ag/Si(111): similarities and differences begins

The crystal structure of silver is body-centred cubic (Figure 4.4a), and so the Ag(111) plane exhibits a close-packed, hexagonal structure (Figure 4.4b). Ag is a stable transition metal, and one of the few metals found abundantly in nature as a pure native element. This stability is due to its relative inertness, and the Ag(111) close-packed surface has the lowest energy of its high-symmetry surfaces.

While this page tells me that the silver (111) surface will be a close-packed hexagonal arrangement, I am uncertain I can trust this because it begins by stating that silver is bcc and Wikipedia tells me silver is fcc.

Schematic model of crystal structure

Figure 4.4: (a) Schematic model of the silver body-centred cubic structure, showing the (111) cleavage plane. (b) Model of the close-packed Ag(111) surface, with the principal directions indicated.


Question(s):

  1. Is bulk silver bcc or fcc?
  2. What is the structure of the silver (111) surface?
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