Epidote
Ito T
American Mineralogist 32 (1947) 309-321
The structure of epidote (HCa2(Al,Fe)Al2Si3O13)
_database_code_amcsd 0000041
8.96 5.63 10.20 90 115.40 90 P2_1/m
atom    x   y    z occ
Ca1  .963 .25 .641
Ca2  .963 .75 .641
Al   .789 .25 .814
Fe      0   0    0
Si1  .394 .25 .711 .75
Al1  .394 .25 .711 .25
Si2  .604 .75 .695 .75
Al2  .604 .75 .695 .25
Si3  .582 .25 .553 .75
Al3  .582 .25 .553 .25
Si4  .375 .75 .940 .75
Al4  .375 .75 .940 .25
O1   .042   0 .843
O2   .301   0 .742
O3   .783   0 .694
O4   .535 .25 .821
O5   .535 .75 .821
O6   .420 .25 .582
O7   .420 .75 .582
O8      0   0   .5
O9   .179 .75 .033
OH10 .179 .25 .033