In a classic antiferromagnet, the two temperatures should coincide and give f = 1 . An ideal quantum spin liquid would not develop magnetic order at any temperature ( T c = 0 ) and so would have a diverging frustration parameter f → → ∞ ∞ . A large value f > 100 is therefore a good indication of a possible spin liquid phase. Some frustrated materials with different lattice structures and their Curie–Weiss temperature are listed in the table below. All of them are proposed spin liquid candidates.