Mg3Si4O10(OH)2*H2O Comodi P, Fumagalli P, Nazzareni S, Zanazzi P F American Mineralogist 90 (2005) 1012-1016 The 10 A phase: Crystal structure from single-crystal X-ray data _database_code_amcsd 0003790 5.323 9.203 10.216 90 99.98 90 C2/m atom x y z Uiso Mg1 0 .5 .5 .018 Mg2 0 .8335 .5 .020 Si .5768 .1666 .2305 .018 O1 .8089 .2487 .1751 .022 O2 .5571 0 .1755 .021 O3 .6291 .1674 .3901 .015 OH4 .1325 0 .3947 .016 Wat5 0 0 0 .099