Tremolite Yang H, Evans B W American Mineralogist 81 (1996) 1117-1125 X-ray structure refinements of tremolite at 140 and 295 K: Crystal chemistry and petrologic implications T = 140 K _database_code_amcsd 0001835 9.8293 18.0307 5.2752 90 104.846 90 C2/m atom x y z occ Biso B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) Mg1 0 .08775 .5 .00072 .00027 .00257 0 .00032 0 Mg2 0 .17639 0 .00068 .00028 .00289 0 .00015 0 Mg3 0 0 0 .00074 .00023 .00279 0 .00016 0 Ca4 0 .27822 .5 .5 .00098 .00024 .00426 0 .00090 0 Ca4' 0 .25882 .5 .5 1.7 Si1 .28039 .08416 .29742 .00048 .00024 .00247 -.00002 -.00001 -.00001 Si2 .28824 .17133 .80493 .00050 .00027 .00256 -.00001 .00005 .00003 O1 .11179 .08596 .21767 .00076 .00032 .00389 .00004 -.00010 -.00014 O2 .11860 .17124 .72418 .00058 .00039 .00437 -.00001 .00021 .00012 O3 .11027 0 .71599 .00077 .00045 .00386 0 .00032 0 O4 .36514 .24820 .79245 .00114 .00034 .00399 -.00015 .00032 -.00001 O5 .34644 .13458 .10096 .00079 .00041 .00398 -.00004 .00036 .00010 O6 .34384 .11833 .59009 .00095 .00037 .00326 .00000 .00026 -.00021 O7 .33726 0 .29140 .00096 .00028 .00587 0 .00043 0 H .20705 0 .77993 2.3