High proton conduction in a new alkali metal-templated open-framework aluminophosphate.

A new open-framework aluminophosphate Na6[(AlPO4)8(OH)6]·8H2O (JU103) has been synthesized by utilization of the organotemplate-free synthetic route in alkali metal-containing system. The as-prepared JU103 possesses two-dimensional intersecting 8-ring channels. Sodium ions and water molecules in the channels facilitates JU103 excellent proton conductivity up to 3.59 × 10(-3) S cm(-1) (293 K, 98% RH).