Glaucophane 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 20 kbar _database_code_amcsd 0006416 9.422 17.662 5.274 90 103.9 90 C2/m atom x y z occ Uiso MgM1 0 .0911 1/2 .72 .0222 FeM1 0 .0911 1/2 .28 .0222 AlM2 0 .1801 0 .80 .0002 FeM2 0 .1801 0 .20 .0002 MgM3 0 0 0 .54 .0002 FeM3 0 0 0 .46 .0002 NaM4 0 .2775 1/2 .99 .0180 LiM4 0 .2775 1/2 .01 .0180 SiT1 .2850 .0861 .2935 .0040 SiT2 .2944 .1730 .8076 .0011 O1 .1105 .0932 .2006 .0023 O2 .1167 .1724 .7475 .0001 OH3 .1092 0 .7035 .0057 O4 .3673 .2543 .7982 .0041 O5 .3601 .1324 .0959 .0008 O6 .3464 .1226 .5851 .0064 O7 .3382 0 .2947 .0087