Aragonite Ye Y, Smyth J R, Boni P American Mineralogist 97 (2012) 707-712 Crystal structure and thermal expansion of aragonite-group carbonates by single-crystal X-ray diffraction Note: T = 184 K Locality: natural, unknown locality _database_code_amcsd 0018848 4.9541 7.9494 5.7186 90 90 90 Pmcn atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Ca .25 .4151 .7599 .997 .013 .019 .014 .007 0 0 -.0003 Sr .25 .4151 .7599 .003 .013 .019 .014 .007 0 0 -.0003 C .25 .763 -.089 .015 .020 .025 .000 0 0 -.001 O1 .25 .9244 -.0961 .015 .027 .007 .011 0 0 -.001 O2 .4752 .6804 -.0875 .014 .018 .013 .010 .005 .002 .000