Esperite Tait K T, Yang H, Downs R T, Li C, Pinch W W American Mineralogist 95 (2010) 699-705 The crystal structure of esperite, with a revised chemical formula, PbCa2(ZnSiO4)3, isostructural with beryllonite Locality: Franklin, New Jersey, USA _database_code_amcsd 0005046 8.7889 8.2685 15.2535 90 90.050 90 P2_1/n atom x y z Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Pb .245756 .055200 .250826 .00928 .01076 .00671 .01038 .00027 .00008 -.00001 Ca1 .73827 .46078 .07414 .00779 .0082 .0068 .0084 -.0006 .0008 .0004 Ca2 .76071 .03835 .08855 .00768 .0095 .0060 .0076 -.0006 -.0010 .0004 Zn1 .57626 .33526 .24338 .00795 .00805 .00877 .00704 -.00053 .00070 -.00056 Zn2 .07422 .33879 .09038 .00789 .00759 .00824 .00786 -.00036 .00004 .00054 Zn3 .09274 .33936 .41626 .00797 .00828 .00850 .00713 .00048 -.00057 -.00032 Si1 .91112 .22833 .26527 .00588 .0062 .0058 .0057 .0005 -.0001 -.0003 Si2 .43933 .22969 .41207 .00581 .0062 .0059 .0053 -.0003 .0005 .0000 Si3 .39507 .22585 .07455 .00596 .0060 .0058 .0062 -.0005 .0002 .0001 O1 .4095 .2295 .1819 .0094 .0095 .0121 .0066 -.0038 .0005 -.0003 O2 .4339 .7366 .2947 .0093 .0075 .0121 .0083 -.0016 .0007 -.0038 O3 .2698 .2303 .3661 .0095 .0079 .0117 .0089 .0023 -.0019 -.0038 O4 .7684 .2503 .1979 .0087 .0080 .0109 .0071 .0019 -.0012 -.0016 O5 .9125 .2422 .0170 .0082 .0097 .0096 .0052 -.0020 .0004 -.0002 O6 .5655 .2541 .0346 .0086 .0067 .0104 .0088 -.0015 .0012 -.0018 O7 .5464 .3672 .3678 .0097 .0130 .0088 .0073 -.0034 .0019 .0002 O8 .2762 .3633 .0417 .0099 .0091 .0087 .0118 .0021 .0013 .0041 O9 .9147 .3644 .3420 .0097 .0107 .0085 .0098 .0015 -.0029 -.0036 O10 .5889 .5519 .1881 .0115 .0173 .0063 .0108 -.0007 .0033 -.0009 O11 -.0172 .5545 .1060 .0102 .0096 .0055 .0156 -.0006 .0012 .0004 O12 .1723 .5508 .4532 .0103 .0123 .0067 .0120 .0011 -.0034 .0005