The conductivity of saturated solution of `Ba_(3) (PO_(4))_(2)` is `1.2 xx 10^(-5) Omega^(-1) cm^(-1)`. The limiting equivalent conductivities of `BaaCl_(2), K_(3)PO_(4)` and KCl are `160, 140` and `100 Omega^(-1) cm^(2)eq^(-1)`, respectively. The solubility product of `Ba_(3)(PO_(4))_(2)` is