  Layered ruthenates are prototype materials with strong structure-property
correlations. We report the structural and physical properties of
double-layered perovskite Sr3(Ru1-xMnx)2O7 single crystals with 0<=x<=0.7.
Single crystal x-ray diffraction refinements reveal that Mn doping on the Ru
site leads to the shrinkage of unit-cell volume and disappearance of (Ru/Mn)O6
octahedron rotation when x>0.16, while the crystal structure remains
tetragonal. Correspondingly, the electric and magnetic properties change with
x. The electrical resistivity reveals metallic character (d rho/d T>0) at high
temperatures but insulating behavior (d rho/d T<0) below a characteristic
temperature T_MIT. Interestingly, T_MIT is different from T_M, at which
magnetic susceptibility reaches maximum. T_MIT monotonically increases with
increasing x while T_M shows non-monotonic dependence with x. The difference
between T_MIT and T_M (T_MIT>T_M) becomes larger when x>0.16. The constructed
phase diagram consists of five distinct regions, demonstrating that the
physical properties of such a system can easily be tuned by chemical doping.
