Muon diamagnetic fraction in liquid water is known to decrease with decreasing temperature probably because its formation mechanism results from the structural alternation and enhanced H-bonding. Our previous experiment studying molecular diffusion in supercooled water (RB1820634) found that the rate changes around the freezing point, possibly indicating a discontinuous change of the formation rate of H-bond because the theoretically predicted “intermediate” ice is present below 0 C. We propose to investigate this observation in relation to the formation mechanism of the diamagnetic and missing fraction in liquid water.