There is no such thing as unified atomic radius. An atomic radius is a class consisting of van der Waals radii $R_\mathrm{vdW}$ (steric interactions), covalent radii $R_\mathrm{cov}$, and ionic radii $R_\mathrm{i}$ (and some other as well).
From the recent edition of CRC Handbook [1, p. 9-57]:
$$
\begin{array}{llrr}
\hline
\text{Element} & \text{Symbol} & R_\mathrm{vdW}~(Å) & R_\mathrm{cov}~(Å)\\
\hline
\text{Chlorine} & \ce{Cl} & 1.75 & 1.00\\
\hline
\end{array}
$$
Ionic radii are given for the crystallographic data separately [1, p. 12-12]:
$$
\begin{array}{llr}
\hline
\text{Ion} & \text{C.N.} & R_\mathrm{i}~(Å)\\
\hline
\ce{Cl^{+5}} & 3~\text{(pyramidal)} & 0.12\\
\ce{Cl^{+7}} & 4 & 0.08\\
\hline
\end{array}
$$
Reference
- Haynes, W. M.; Lide, D. R.; Bruno, T. J. CRC handbook of chemistry and physics: a ready-reference book of chemical and physical data.; 2017; Vol. 97. ISBN 978-1-4987-5429-3.