Kentrolite Moore P B, Sen Gupta P K, Shen J, Schlemper E O American Mineralogist 76 (1991) 1389-1399 The kentrolite-melanotekite series, 4Pb2(Mn,Fe)2O2[Si2O7]: Chemical crystallographic relations, lone-pair splitting, and cation relation to 8URe2 _database_code_amcsd 0001395 6.961 11.018 9.964 90 90 90 Pbcn atom x y z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Pb1 .4561 .3012 .5500 .73 .0167 .0091 .0096 .0003 -.0011 -.0016 Pb2 .5351 .3098 .5475 .27 .0267 .0075 .0064 .0039 .0015 -.0004 Mn1 .5 0 0 .68 .0099 .0060 .0062 .0009 -.0015 -.0017 Fe1 .5 0 0 .32 .0099 .0060 .0062 .0009 -.0015 -.0017 Mn2 .5 .1482 .25 .68 .0083 .0080 .0054 0 -.0011 0 Mn2 .5 .1482 .25 .32 .0083 .0080 .0054 0 -.0011 0 Si .2140 -.0907 .2528 .0078 .0046 .0066 .0013 -.0009 .0005 O1 .3402 .0054 .3361 .0116 .0072 .0094 -.0079 -.0013 -.0057 O2 .2995 -.1135 .1031 .0251 .0083 .0087 -.0054 .0034 -.0075 O3 .1888 -.2217 .3272 .0126 .0125 .0094 -.0051 -.0011 .0040 O4 0 -.0286 .25 .0059 .0109 .0546 0 .0001 0 O5 .6094 .1442 .4227 .0167 .0034 .0039 -.0010 -.0018 .0001