# How do you measure ionic radii?

The data here are quoted in $\text{picometre}$, ${10}^{-} 12 \cdot m$. Structural chemists would more commonly use $\text{Angstroms}$, where $\text{1 Angstrom"-=1*stackrel(@)"A} = 1 \times {10}^{-} 10 \cdot m$.