Combeite
Fischer R X, Tillmanns E
Acta Crystallographica C43 (1987) 1852-1854
Revised data for combeite, Na2Ca2Si3O9
Locality: synthetic high-temperature form
_database_code_amcsd 0010051
10.429 10.429 13.149 90 90 120 R-3m
atom     x      y      z occ Uiso
Na1      0      0  .2505 .60 .019
Ca1      0      0  .2505 .40 .019
Na2     .5      0      0 .76 .028
Na3     .5      0     .5 .60 .023
Ca3     .5      0     .5 .40 .023
Ca4      0      0      0     .012
Sil  .1511 -.1511  .5642     .014
Ol   .2511      0     .5     .050
O2   .1150 -.1150  .6740     .034
O3   .2385 -.2385  .5548     .038