Serendibite Van Derveer D G, Swihart G H, Sen Gupta P K, Grew E S American Mineralogist 78 (1993) 195-203 Cation occupancies in serendibite: A crystal structure study Sample from Johnsburg, New York Displacement parameters obtained from ICSD _database_code_amcsd 0001546 10.010 10.393 8.631 106.37 96.10 124.38 P-1 atom x y z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) B1 .4651 .2357 .3304 .652 .0097 .0081 .0061 .0066 .0023 .0028 Si1 .4651 .2357 .3304 .348 .0097 .0081 .0061 .0066 .0023 .0028 Si2 .98393 .22828 .34086 .0069 .0070 .0062 .0042 .0018 .0029 Al3 .78569 .34446 .23325 .0063 .0055 .0055 .0037 .0021 .0027 B4 .2688 .3290 .2197 .980 .0058 .0065 .0076 .0027 .0020 .0038 Si4 .2688 .3290 .2197 .020 .0058 .0065 .0076 .0027 .0020 .0038 Si5 .64333 .94317 .44362 .0077 .0075 .0079 .0048 .0027 .0019 Si6 .35610 .55441 .05422 .0065 .0060 .0056 .0040 .0022 .0022 Al1 0 0 .5 .0063 .0058 .0050 .0041 .0018 .0021 Al2 0 .5 0 .0059 .0054 .0054 .0035 .0021 .0019 Al3 .31197 .85596 .17246 .0063 .0081 .0063 .0048 .0025 .0032 Al4 .77752 .82192 .14551 .0079 .0088 .0083 .0055 .0033 .0041 Mg5 .09481 .94392 .06251 .0042 .0061 .0055 .0037 .0028 .0042 Mg6 .59383 .93901 .05623 .0044 .0066 .0076 .0037 .0027 .0044 Al7 .99816 .74020 .25928 .0066 .0056 .0060 .0040 .0025 .0025 Ca8 .21564 .62437 .39800 .775 .0100 .0097 .0085 .0067 .0040 .0045 Na8 .21564 .62437 .39800 .225 .0100 .0097 .0085 .0067 .0040 .0045 Ca9 .64732 .60051 .38263 .823 .0062 .0105 .0107 .0040 .0029 .0052 Na9 .64732 .60051 .38263 .177 .0062 .0105 .0107 .0040 .0029 .0052 O1 .3531 .0647 .1736 .0099 .0106 .0109 .0070 .0027 .0039 O2 .8448 .0496 .1682 .0105 .0100 .0074 .0071 .0028 .0035 O3 .5409 .9530 .2890 .0130 .0116 .0129 .0071 .0045 .0017 O4 .0143 .9336 .2775 .0080 .0077 .0070 .0044 .0033 .0029 O5 .2409 .8684 .3818 .0094 .0094 .0092 .0056 .0013 .0026 O6 .7623 .8819 .3830 .0072 .0091 .0105 .0048 .0024 .0040 O7 .4899 .2096 .4948 .0128 .0106 .0131 .0064 .0077 .0063 O8 .9573 .7881 .4825 .0080 .0081 .0091 .0049 .0023 .0041 O9 .9004 .3259 .3802 .0154 .0101 .0089 .0093 .0033 .0040 O10 .3839 .3254 .3450 .0097 .0097 .0100 .0050 .0015 .0044 O11 .6516 .1633 .0462 .0087 .0098 .0123 .0058 .0040 .0046 O12 .1610 .1760 .0618 .0085 .0082 .0085 .0051 .0001 .0015 O13 .5362 .7101 .0488 .0127 .0097 .0108 .0074 .0052 .0038 O14 .0686 .7260 .0646 .0094 .0081 .0076 .0054 .0034 .0035 O15 .2407 .6156 .1168 .0085 .0107 .0089 .0069 .0031 .0037 O16 .7533 .6129 .1350 .0089 .0100 .0075 .0050 .0023 .0009 O17 .3893 .4867 .1931 .0103 .0084 .0088 .0058 .0043 .0051 O18 .9520 .5259 .2158 .0110 .0106 .0088 .0067 .0029 .0043 O19 .1655 .3586 .3125 .0101 .0100 .0118 .0053 .0067 .0039 O20 .6558 .3680 .3333 .0198 .0184 .0099 .0148 .0064 .0052