抄録
A statistical model of the distribution of the contact number for a binary mixture in an incompletely mixed state is introduced. The model is derived from the beta-binomial model proposed by Yoshizawa and Shindo. The mixing index based on the contact number is defined and described by only one parameter in this model.
The precision of the estimation of the mixing index, based on the contact number by coordination number sampling in an incompletely mixed state, has been derived and simulated on a computer.
