One-dimensional magnetic halide double perovskites [N(CH 3 ) 4 ] 2 M I MoCl 6 (M I = Na, Ag) with large A-site cations

Face-sharing 1D chain magnetic halide double perovskites, [N(CH 3 ) 4 ] 2 NaMoCl 6 and [N(CH 3 ) 4 ] 2 AgMoCl 6 , where N(CH 3 ) 4 is a tetramethylammonium cation.