Pargasite
Raudsepp M, Turnock A C, Hawthorne F C, Sherriff B L, Hartman J S
American Mineralogist 72 (1987) 580-593
Characterization of synthetic pargasitic amphiboles
(NaCa2Mg4M3+Si6Al2O22(OH,F)2; M3+ = Al,Cr,Ga,Sc,In) by infrared spectroscopy,
Rietveld structure refinement, and 27Al, 29Si, and 19F MAS NMR spectroscopy
Sample: FScPA-A3
_database_code_amcsd 0001085
9.8852 18.1574 5.3186 90 105.213 90 C2/m
atom     x     y     z  occ Biso
O1   .1108 .0864  .219        .8
O2   .1138 .1709  .724        .8
F    .1008     0  .711        .8
O4   .3598 .2468  .788        .8
O5   .3535 .1388  .122       1.1
O6   .3447 .1140  .620       1.1
O7    .353     0  .291       1.2
SiT1 .2838 .0833  .304  .75   .4
AlT1 .2838 .0833  .304  .25   .4
SiT2 .2909 .1692 .8090  .75   .4
AlT2 .2909 .1692 .8090  .25   .4
MgM1     0 .0870    .5 .922   .6
ScM1     0 .0870    .5 .078   .6
MgM2     0 .1763     0 .597   .6
ScM2     0 .1763     0 .403   .6
MgM3     0     0     0        .6
CaM4     0 .2791    .5        .9
NaA   .029    .5  .068   .5  2.3