Pargasite
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 ambient conditions (.001 kbar)
_database_code_amcsd 0006418
9.881 17.998 5.284 90 105.25 90 C2/m
atom      x     y     z  occ  Uiso
NaA       0   1/2     0  .26  .040
NaAM  .0460   1/2 .1297  .12  .043
NaA2      0 .4666     0  .12  .025
KA2       0 .4666     0  .01  .025
MgM1      0 .0888   1/2 .945 .0058
FeM1      0 .0888   1/2 .055 .0058
MgM2      0 .1761     0 .725 .0045
AlM2      0 .1761     0  .15 .0045
CrM2      0 .1761     0  .09 .0045
TiM2      0 .1761     0 .035 .0045
MgM3      0     0     0  .92 .0046
FeM3      0     0     0  .08 .0046
CaM4      0 .2791   1/2  .49 .0096
FeM4      0 .2791   1/2  .01 .0096
CaM42 .4653 .2198 .6168  .25  .045
SiT1  .2797 .0850 .3022 .655 .0052
AlT1  .2797 .0850 .3022 .345 .0052
SiT2  .2899 .1726 .8112      .0056
O1    .1077 .0873 .2185      .0088
O2    .1193 .1729 .7306      .0089
O3    .1077     0 .7152      .0103
O4    .3664 .2494 .7887      .0102
O5    .3484 .1390 .1096      .0112
O6    .3436 .1164 .6064      .0125
O7    .3382     0 .2795      .0132
H      .175     0  .748       .012