Pb21[Si7O22]2[Si4O13] Siidra O I, Zenko D S, Krivovichev S V American Mineralogist 99 (2014) 817-823 Structural complexity of lead silicates: Crystal structure of Pb21[Si7O22]2[Si4O13] and its comparison to hyttsjoite Locality: synthetic _database_code_amcsd 0020132 9.9244 9.9244 34.2357 90 90 120 P6_3/m atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Pb1 2/3 1/3 .594983 .01184 .01273 .01273 .0101 .00637 0 0 Pb2 2/3 1/3 .490651 .01352 .01453 .01453 .0115 .00726 0 0 Pb3 .75175 .01367 .545490 .01375 .01206 .01489 .01423 .00668 -.00022 .00059 Pb4 .08035 .64380 .653630 .01664 .01375 .01605 .01811 .00594 .00214 .00081 Pb5 2/3 1/3 .698105 .02069 .02583 .02583 .0104 .01292 0 0 Pb6 .8208 .7603 .75 1/3 .0122 .0061 .0120 .0181 .0042 0 0 Pb6A .8013 .7563 .74109 1/3 .0481 .0444 .0481 .066 .0335 .0321 .0258 Si1 0 0 .66788 .0206 .0195 .0195 .023 .0098 0 0 Si2 .9873 .5707 .75 .0118 .0093 .0103 .0145 .0040 0 0 Si3 .6029 .6077 .55296 .0101 .0115 .0108 .0090 .0062 -.0019 .0005 Si4 .9360 .2492 .63335 .0134 .0131 .0148 .0104 .0056 .0000 .0009 Si5 1/3 2/3 .7398 .5 .0085 .0071 .0071 .011 .0036 0 0 O1 .8553 .3855 .75 .0125 .015 .013 .010 .008 0 0 O2 .6955 .5135 .54715 .0137 .017 .012 .013 .007 .001 -.002 O3 .6446 .7344 .5187 .0191 .031 .017 .015 .016 .003 .005 O4 .7599 .1252 .6215 .0213 .009 .026 .024 .005 .005 .008 O5 .0389 .3315 .59424 .0224 .012 .033 .012 .003 .001 .011 O6 0 0 .7141 .022 .021 .021 .024 .0105 0 0 O7 .9638 .6542 .7121 .0245 .037 .028 .017 .023 .012 .009 O8 .1412 .9762 .6532 .0301 .026 .027 .042 .016 .016 .006 O9 .4174 .4943 .5569 .0284 .011 .014 .058 .005 -.002 -.004 O10 .9442 .3821 .6617 .037 .032 .021 .042 .002 .016 -.013 O11 .1581 .5831 .75 .048 .005 .015 .119 .001 0 0 O12 1/3 2/3 .6943 .5 .027