Coesite Ikuta D, Kawame N, Banno S, Hirajima T, Ito K, Rakovan J F, Downs R T, Tamada O American Mineralogist 92 (2007) 57-63 First in situ X-ray diffraction identification of coesite and retrograde quartz on a glass thin section of an ultrahigh-pressure metamorphic rock and their crystal structure details Locality: Yangkou meta-igneous complex in the middle part of the Sulu UHP terrain, eastern China Note: Sample is on a thin section _database_code_amcsd 0004264 7.140 12.371 7.175 90 120.34 90 C2/c atom x y z Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Si1 .1401 .1083 .0723 .014 .015 .012 .015 -.001 .008 -.001 Si2 .5068 .1581 .5407 .015 .017 .013 .015 -.001 .009 .000 O1 .0000 .0000 .0000 .016 .016 .013 .017 -.008 .008 -.006 O2 .5000 .1162 .7500 .015 .020 .015 .012 .000 .010 .000 O3 .2669 .1236 .9406 .020 .022 .024 .018 -.006 .013 -.005 O4 .3104 .1042 .3275 .020 .023 .021 .016 -.008 .009 -.005 O5 .0167 .2120 .4780 .017 .021 .014 .021 -.001 .014 .001