Andalusite Winter J K, Ghose S American Mineralogist 64 (1979) 573-586 Thermal expansion and high-temperature crystal chemistry of the Al2SiO5 polymorphs T = 1000 deg C _database_code_amcsd 0000732 7.8976 7.9735 5.5695 90 90 90 Pnnm atom x y z B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) Al1 0 0 .2418 0.0107 0.0077 0.0070 0.0036 0 0 Al2 .3724 .1404 .5 0.0042 0.0059 0.0090 0.0001 0 0 Si .2461 .2551 0 0.0042 0.0049 0.0080 .0000 0 0 Oa .4224 .3661 0 0.0055 0.0074 0.0093 -.0019 0 0 Ob .1033 .4006 0 0.0041 0.0053 0.0306 0.0006 0 0 Oc .4259 .3629 .5 0.0073 0.0058 0.0098 -.0014 0 0 Od .2345 .1379 .2387 0.0072 0.0081 0.0102 -.0018 -.0023 .0020