A　series　of　rare　metal　organic　frameworks　based　on　In-M　heterometallic　clusters　[(CH3)(2)NH2][In3M2(BTC)(4)(DMF)(2)(H2O)(4)Cl-2]center　dot　solvent　(1-M,　M　=　Ca,　Sr,　Ba,　H3BTC　=　1,3,5-benzenetricarboxylic　acid,　DMF　=　N,N-dimethylformamide)　have　been　successfully　synthesized.　Structural　analysis　reveals　that　1-M　represent　fascinating　three-dimensional　porous　frameworks　constructed　from　different　nanoscale　cages.　What　is　more,　these　new　materials　exhibit　interesting　gas　adsorption　properties　that　can　be　tuned　by　encapsulating　different　alkaline　earth　metal　ions.