title: Synthesis and characterisation of a new high pressure polymorph of Cu2WS4.
abstract: In this communication we report the synthesis and structural characterisation of a new body centred polymorph of Cu2WS4 prepared using hydrothermal methods. I-Cu2WS4 crystallises in space group I42m with cell parameters a = b = 5.44427(8), c = 10.0687(2) A and has a new structure type containing layers of edge-sharing CuS4 and WS4 tetrahedra.