Clintonite
Takeuchi Y, Sadanaga R
Acta Crystallographica 12 (1959) 945-946
The crystal structure of xanthophyllite
Locality: Chichibu mine, Japan
_database_code_amcsd 0009236
5.19 9.00 9.74 90 100.1 90 C2/m
atom    x    y    z  occ
Ca     .5   .5    0
Mg     .5 .328   .5
Al1     0   .5   .5
Al2  .556 .172 .205 .75
Si2  .556 .172 .205 .25
O1   .419    0  .14
O2   .841 .185  .14
O3   .602 .161 .383
OH   .632   .5 .398