  Exploration of rare-earth (RE)-based Kagome lattice magnets with spin-orbital
entangled jeff=1/2 moments will provide new platform for investigating the
exotic magnetic phases. Here, we report a new family of RE3BWO9
(RE=Pr,Nd,Gd-Ho) boratotungstates with magnetic RE3+ ions arranged on Kagome
lattice, and perform its structure and magnetic characterizations. This serial
compounds crystallize in hexagonal coordinated structure with space group P63
(No.173), where magnetic RE3+ ions have distorted Kagom\'e lattice connections
within the ab plane and stacked in a AB-type fashion along c axis. The
interlayer RE-RE separation is comparable with that of intralayer distance,
forming 3-dimensional (3D) exchange coupled magnetic framework of RE3+ ions.
The magnetic susceptibility data of RE3BWO9 (RE=Pr, Nd, Gd-Ho) reveal dominant
antiferromagnetic interactions between magnetic RE3+ ions, but without visible
magnetic ordering down to 2 K. The magnetization analyses for different RE3+
ions show diverse anisotropic behaviors, make RE3BWO9 as an appealing
Kagome-lattice antiferromagnet to explore exotic magnetic phases.
