We can find and purchase aluminum, copper, lead, gold, and silver foil. But you will never be able to get zinc foil. Just as we can buy nickel, chromium and iron wire, but you will never get the cobalt wire.
Why it should be like that?
The answer lies in how the atoms are arranged in the solid metal. In metallic solids,the atoms are arranged densely. In a particular field dense arrangement is the arrangement with one atom surrounded by 6 neighboring atoms. But in space there are two possibilities to make densely packed arrangement as shown in the following figure.
As we can see in the picture at left densely arrangement not only visible in one field, but in all four directions. In the two rightmost image, the opposite arrangement only one field alone, ie in a plane perpendicular to the image area. When the metal is forged or drawn wire used, this areas is moving.
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