Bimetallic MOFs (H3O)x[Cu(MF6)(pyrazine)2]·(4 - x)H2O (M = V^4+, x = 0; M = Ga^3+, x = 1): co-existence of ordered and disordered quantum spins in the V^4+ system. by Manson, J, Schlueter, J, Garrett, K, Goddard, P, Lancaster, T, Möller, J, Blundell, S, Steele, A, Franke, I, Pratt, F, Singleton, J, Bendix, J, Lapidus, S, Uhlarz, M, Ayala-Valenzuela, O, McDonald, R, Gurak, M, Baines, C