Diopside Finger L W, Ohashi Y American Mineralogist 61 (1976) 303-310 The thermal expansion of diopside to 800 C and a refinement of the crystal structure at 700 C T = 700 C _database_code_amcsd 0000517 9.804 9.030 5.275 90 105.98 90 C2/c atom x y z B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) Ca 0 .9067 .25 .00049 .00040 .00147 0 .00028 0 Mg 0 .3003 .25 .00082 .00043 .00208 0 .00007 0 Si .2864 .0923 .2299 .00032 .00030 .00137 -.00003 .00027 -.00040 O1 .1167 .0872 .1417 .00039 .00051 .00155 -.00011 .00025 -.00030 O2 .3617 .2460 .3166 .00070 .00040 .00220 -.00020 .00040 -.00030 O3 .3493 .0155 .9978 .00042 .00058 .00163 .00003 .00031 -.00028