Tremolite Comodi P, Mellini M, Ungaretti L, Zanazzi P F European Journal of Mineralogy 3 (1991) 485-499 Compressibility and high pressure structure refinement of tremolite, pargasite and glaucophane Sample: pressure at 35 kbar _database_code_amcsd 0006414 9.640 17.890 5.228 90 105.1 90 C2/m atom x y z occ Uiso MgM1 0 .0870 1/2 .99 .0059 FeM1 0 .0870 1/2 .01 .0059 MgM2 0 .1747 0 .99 .0100 FeM2 0 .1747 0 .01 .0100 MgM3 0 0 0 .99 .0064 FeM3 0 0 0 .01 .0064 CaM4 0 .2768 1/2 .0044 SiT1 .2858 .0840 .3005 .0033 SiT2 .2890 .1716 .8065 .0054 O1 .1145 .0851 .2170 .0036 O2 .1163 .1700 .7269 .0042 OH3 .1110 0 .7152 .0047 O4 .3643 .2503 .7897 .0054 O5 .3506 .1367 .1058 .0062 O6 .3472 .1172 .5947 .0050 O7 .3460 0 .2909 .0059