Apophyllite-(KF)
Stahl K
European Journal of Mineralogy 5 (1993) 845-849
A neutron powder diffraction study of partially dehydrated
fluorapophyllite, KCa4Si8O20F*6.9H2O
_database_code_amcsd 0006492
8.9639 8.9639 15.754 90 90 90 P4/mnc
atom     x     y     z  occ
F        0     0     0
K        0     0   1/2
Ca   .1150 .2402     0
Si   .2317 .0873 .1917
O1   .3624 .1376   1/4
O2   .0894 .1915 .2159
O3   .2663 .1021 .0923
O4   .2132 .4489 .0903  .69
O5   .1848 .4878     0  .34
H1   .4465 .1722 .0894  .69
H2   .2209 .4257 .1492  .69
H3   .1574 .5505 .0366  .34