Hydroxyapophyllite-(K) Rouse R C, Peacor D R, Dunn P J American Mineralogist 63 (1978) 196-202 Hydroxyapophyllite, a new mineral, and a redefinition of the apophyllite group II. Crystal structure Locality: Kimberley, South Africa _database_code_amcsd 0000617 8.979 8.979 15.830 90 90 90 P4/mnc atom x y z Biso B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) K 0 0 .5 .0058 .0058 .00370 0 0 0 Ca .1108 .2475 0 .0024 .0024 .00077 .00004 0 0 Si .2265 .0864 .18964 .0020 .0020 .00074 .00000 -.0002 -.0001 O1 .8637 .3637 .25 .0027 .0027 .00090 .0008 .0005 -.0005 O2 .0864 .1890 .2166 .0028 .0042 .00160 .0010 -.0003 -.0007 O3 .2657 .1025 .0925 .0037 .0041 .00090 .0000 -.0002 -.0001 O4 .2152 .4504 .0889 .0089 .0043 .00130 -.0001 .0001 -.0006 OH 0 0 0 .0013 .0013 .00220 0 0 0 H1 .453 .135 .106 6.8 H2 .214 .432 .134 .6