Poldervaartite Marsh R E Acta Crystallographica C50 (1994) 996-997 A revised structure for alpha-dicalcium silicate hydrate Locality: synthetic Ca2SiO3OHOH _database_code_amcsd 0010292 9.487 9.179 10.666 90 90 90 Pbca atom x y z Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Ca1 .48415 .16956 .06863 0 .0092 .0086 .0079 -.0027 -.0014 .0002 Ca2 .34570 .00578 .38878 0 .0077 .0081 .0078 -.0003 -.0003 .0004 Si1 .16927 .21286 .15970 0 .0067 .0071 .0063 -.0004 -.0002 -.0001 O1 .05605 .13832 .06504 0 .0084 .0089 .0082 -.0017 -.0008 -.0009 O2 .24927 .34579 .07281 0 .0169 .0088 .0109 -.0012 .0039 .0003 O3 .29582 .09944 .19042 0 .0098 .0100 .0120 .0021 -.0018 .0009 O4 .10182 .29231 .27970 0 .0141 .0101 .0066 -.0020 .0021 .0005 O5 .39398 .45254 .39616 0 .0090 .0092 .0110 .0012 -.0006 .0006 H1 .238 .438 .110 .047 H2 .406 .413 .339 .062