Enstatite Hawthorne F C, Ito J The Canadian Mineralogist 15 (1977) 321-338 Synthesis and crystal-structure refinement of transition-metal orthopyroxenes I: Orthoenstatite and (Mg, Mn, Co) orthopyroxene _database_code_amcsd 0005139 18.216 8.813 5.179 90 90 90 Pbca atom x y z B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) SiA .27171 .34150 .0503 .00037 .00176 .00252 -.00005 -.00002 -.00005 SiB .47356 .33730 .7982 .00037 .00173 .00261 .00005 -.00004 .00004 MgM1 .37580 .65386 .8660 .00052 .00209 .00264 -.00002 -.00013 .00007 MgM2 .37682 .4870 .3587 .00065 .00255 .00424 -.00007 -.00045 .00032 O1A .18332 .3399 .0346 .00036 .00256 .00327 -.00001 .00002 -.00008 O2A .3110 .5024 .0434 .00059 .00210 .00503 -.00030 -.00014 .00020 O3A .3032 .2226 -.1678 .00053 .00265 .00324 .00005 -.00010 -.00089 O1B .5624 .3402 .7997 .00042 .00228 .00388 -.00008 .00000 .00010 O2B .4328 .4832 .6890 .00056 .00224 .00400 .00023 -.00016 .00011 O3B .4477 .1950 .6040 .00052 .00237 .00313 -.00003 .00017 -.00092