Varennesite Grice J D, Gault R A The Canadian Mineralogist 33 (1995) 1073-1081 Varennesite, a new species of hydrated Na-Mn silicate with a unique monophyllosilicate structure _database_code_amcsd 0005463 13.447 15.022 17.601 90 90 90 Cmcm atom x y z Uiso Na1 .5 .0480 .3372 .0012 Na2 .7419 .0438 .3385 .0020 Na3 .8689 0 .5 .0031 Mn .6216 0 .5 .0010 Si1 .3861 .1223 .75 .0007 Si2 .2819 .1637 .5943 .0007 Si3 .1135 .2924 .5522 .0006 O1 .5 .1596 .75 .0013 O2 .3788 .0174 .75 .0014 O3 .3326 .1715 .8220 .0014 O4 .1793 .2222 .6021 .0015 O5 .1459 .2792 .4633 .0009 O6 .2676 .0650 .5655 .0012 O7 .5 .2459 .4408 .0010 O8 .1262 .3927 .5788 .0011 OH .5 .0524 .5605 .0021 OW1 .2679 .1729 .25 .0042 OW2 .5 .1758 .25 .0059 OW3 .8878 .1143 .3985 .0041 OW4 0 .0665 .5766 .0030 OW5 .9057 -.0322 .25 .0009 OW6 0 .1518 .25 .0062