Combeite
Fischer R X, Tillmanns E
Acta Crystallographica C43 (1987) 1852-1854
Revised data for combeite, Na2Ca2Si3O9
Locality: synthetic low-temperature form
_database_code_amcsd 0010050
10.464 10.464 13.176 90 90 120 P3_121
atom     x     y     z occ Uiso
Na1  .3125 .9845 .5889 .52 .016
Ca1  .3125 .9845 .5889 .43 .016
Na21 .5032 .3366 .6644     .023
Na22 .8115     0   1/3 .40 .049
Na31 .5196 .3618 .1579 .48 .023
Ca31 .5196 .3618 .1579 .47 .023
Ca32 .8217     0   5/6     .010
Ca4  .3083     0   1/3     .007
Sil  .1978 .1523 .7759     .007
Si2  .4973 .3207 .8958     .007
Si3  .6269 .1489 .7643     .007
Ol   .1616     0   5/6     .028
O2   .5591     0   5/6     .028
O3   .3445 .2787 .8354     .017
O4   .5861 .2639 .8217     .021
O5   .2439 .1479 .6611     .016
O6   .4683 .2435 .0015     .023
O7   .5547 .1109 .6552     .019
O8   .0688 .1892 .7922     .013
O9   .5939 .4961 .8881     .018
O10  .8011 .2184 .7774     .016