Table lists the mean values of all of the representative parameters obtained from the extracted coordination structures; the mean coordination number (CN), bond distance (R), and RE distance from G are also included. As reference parameters, the results from crystalline LaBO 3 and YBO 3 are also listed in Table . Two Y sites (8e and 4b in Wyckoff notation) in YBO 3 were individually estimated. The reference structures from the solution of the Thomson problem in Table show much smaller I ω values for CN = 6-12 (0-784.1); hence, the RE coordination structure in the glass is far from stable when considering Coulombic energys alone. The oxygen not bonded to boron, as shown by O 0 species in Fig. , is coordinated only to La in a stable position. As a result, a highly spherically symmetric coordination structure like the model structure is expected to form in glasses with high La 2 O 3 content.