Deposition of Nb on SiO2 wafer (Z-Cut)

I am trying to sputter $\ce{Nb}$ on $\ce{SiO2}$ Z-Cut wafers (quartz crystal). I was wondering if $\ce{Nb}$ will stick well to the surface of the wafer. 


I've routinely deposited $\ce{Nb}$ on $\ce{Si}$ wafers but have never done so on quartz crystal wafers.


