Yoshiokaite
Steele I M, Pluth J J
American Mineralogist 75 (1990) 1186-1191
Crystal structure of synthetic yoshiokaite, a stuffed derivative of the
tridymite structure
_database_code_amcsd 0001330
9.927 9.927 8.220 90 90 120 P-3
atom      x      y       z  occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Si1  .67620 .75715 -.06751 .331 0.0079 0.0087 0.0108 0.0048 0.0002 -.0009
Al1  .67620 .75715 -.06751 .669 0.0079 0.0087 0.0108 0.0048 0.0002 -.0009
Si2  .75703 .67636  .56732 .331 0.0086 0.0079 0.0111 0.0046 0.0010 -.0002
Al2  .75703 .67636  .56732 .669 0.0086 0.0079 0.0111 0.0046 0.0010 -.0002
Si3     1/3    2/3   .9618 .166 0.0072 0.0072  0.027 0.0036      0      0
Al3     1/3    2/3   .9618 .334 0.0072 0.0072  0.027 0.0036      0      0
Si3'    1/3    2/3   .0421 .166 0.0054 0.0054 0.0070 0.0027      0      0
Al3'    1/3    2/3   .0421 .334 0.0054 0.0054 0.0070 0.0027      0      0
Si4     1/3    2/3   .5407 .166 0.0046 0.0046 0.0083 0.0023      0      0
Al4     1/3    2/3   .5407 .334 0.0046 0.0046 0.0083 0.0023      0      0
Si4'    1/3    2/3   .4606 .166 0.0085 0.0085  0.025 .00425      0      0
Al4'    1/3    2/3   .4606 .334 0.0085 0.0085  0.025 .00425      0      0
O1    .2816  .0567   .0762      0.0189 0.0161 0.0147 0.0092 0.0014 -.0002
O2    .0556  .2814   .4241      0.0164 0.0181 0.0150 0.0090 -.0015 -.0019
O3    .5134  .3560   .0028      0.0129 0.0153  0.060 0.0075 0.0088 0.0099
O4    .3556  .5132   .4957      0.0160 0.0129  0.062 0.0074 -.0111 -.0116
O5    .6827  .0004   .2508      0.0193 0.0200 0.0174 0.0104 -.0003 0.0013
O6      1/3    2/3   .2501   .5  0.042  0.042  0.020  0.021      0      0
O6'     2/3    1/3   .2573   .5  0.047  0.047  0.021 0.0235      0      0
Ca   .44328 .00004  .25008 .892 0.0192 0.0425 0.0151 0.0214 -.0023 -.0043