Natroapophyllite
Miura Y, Kato T, Rucklidge J C, Matsueda H
American Mineralogist 66 (1981) 410-423
Natroapophyllite, a new orthorhombic sodium analog of apophyllite
II. Crystal structure
_database_code_amcsd 0000829
8.875 8.881 15.79 90 90 90 Pnnm
atom     x     y     z Biso
Si1  .2289 .0833 .1890 1.12
Si2  .4161 .2708 .3108 1.13
Ca1  .1143 .2465     0 1.20
Ca2  .7537 .1148     0 1.25
Na       0     0    .5 2.84
F        0     0     0 1.87
O1   .3671 .1322 .2513 1.36
O2   .0882 .1902 .2162 1.63
O21  .3099 .4123 .2839 1.59
O3   .2696 .0987 .0921 1.75
O31  .4016 .2305 .4079 1.66
O4   .2286 .4505 .0887 2.45
O41  .5502 .2253 .0890 2.70
H1     .47   .17   .05 1.60
H11    .17   .54   .08 1.40
H2     .16   .43   .14 0.80
H21    .56   .31   .14 3.20