of ${}^{173}\mathrm{Yb}^+({}^2\!\!\;F_{7/2}^o)$ can be accomplished via microwave Ramsey spectroscopy on a single trapped ion. A pure state can be prepared by beginning with optical pumping on the narrow-band (E2) ${}^2\!\:D_{5/2} \!\leftarrow \! {}^2\!\:S_{1/2} $ transition at $411 \mbox{ nm}$, which will spontaneously decay mainly to ${}^2\!F_{7/2}^o$ via the allowed E1 transition at $\lambda \! = \! 3.4\mbox{ }\mu\mbox{m}$. By restricting the E2 transition to drive only ${}^2\!D_{5/2}(F\!=\!0) \!\leftarrow \! {}^2\!S_{1/2}(F\!=\!2) $, the $F\!=\!1$ hyperfine level in ${}^2\!F_{7/2}^o$ will be populated. Following this optical pumping step, resonant microwaves can be used to drive $2\!\leftarrow \! 1$ at $\approx 1\mbox{ GHz}$, followed by de-shelving of the remaining $F\!=\!1$ population in ${}^2\!F_{7/2}^o$ back to ${}^2\!S_{1/2}$ via the E2 transition ${}^1\![3/2]_{3/2}^o \! \leftarrow \! {}^2\!F_{7/2}^o$ at $\lambda\!=\!760 \mbox{ nm}$. An ion in the ground state can be distinguished from a ${}^2\!F_{7/2}^o$ ion via the appearance or lack of laser-induced fluorescence on ${}^2\!P_{1/2}^o \leftrightarrow \!{}^2\!S_{1/2}$. By observing how the microwave resonance frequency depends upon the magnetic field in the trap, the $M_F\!=\!0 \! \leftrightarrow \! 0$ transition can be isolated, permitting preparation of the ${}^2\!F_{7/2}^o(F\! = \!2, M_F\! = \!0)$ single quantum state. From there, stepwise microwave excitation through the hyperfine structure can be used 