[Cu(HF(2))(2)(pyrazine)](n): A Rectangular Antiferromagnetic Lattice with a Spin Exchange Path Made Up of Two Different FHF(-) Bridges. - Manson, J; Warter, M; Schlueter, J; Lancaster, T; Steele, A; Blundell, S; Pratt, F; Singleton, J; McDonald, R; Lee, C; Whangbo, M; Plonczak, A (2011)