This means that the chemical formula used for a metal is simply the symbol for the element. For example, the formula for iron is Fe, even though a piece of iron contains very many iron atoms.
X-ray crystallography has been instrumental in this pursuit, allowing scientists to determine molecular structures ... adsorbed onto iron porphyrin (Fe porphyrin) derivatives and zirconium (Zr) ...
Refined 15 metal occupancies in each structure are at least 0.92 and have been reset to 1.0 in the final structures. Figure 1: a, Omit map of Met-Ala-Ser in the PDF–Ni/MAS structure contoured at 1σ ...