Pargasite
Oberti R, Ungaretti L, Cannillo E, Hawthorne F C, Memmi I
European Journal of Mineralogy 7 (1995) 1049-1063
Temperature-dependent Al order-disorder in the
tetrahedral double chain of C2/m amphiboles
Sample: S(7)
_database_code_amcsd 0006605
9.870 18.046 5.318 90 105.04 90 C2/m
atom      x     y     z   occ Biso
NaA       0   1/2     0  .092 3.03
KA        0   1/2     0   .02 3.03
NaAm  .0408   1/2 .0875  .092 4.20
KAm   .0408   1/2 .0875   .02 4.20
NaA2      0  .491     0  .092 2.79
KA2       0  .491     0   .02 2.79
MgM1      0 .0887   1/2   .71  .60
FeM1      0 .0887   1/2   .29  .60
MgM2      0 .1778     0  .505  .54
AlM2      0 .1778     0  .125  .54
TiM2      0 .1778     0  .165  .54
FeM2      0 .1778     0  .205  .54
MgM3      0     0     0   .63  .54
AlM3      0     0     0   .05  .54
FeM3      0     0     0   .32  .54
NaM4      0 .2803   1/2 .0025  .74
CaM4      0 .2803   1/2 .4575  .74
MnM4      0 .2803   1/2  .005  .74
FeM4      0 .2803   1/2  .035  .74
NaM4'     0 .2580   1/2 .0025  .62
CaM4'     0 .2580   1/2 .4575  .62
MnM4'     0 .2580   1/2  .005  .62
FeM4'     0 .2580   1/2  .035  .62
AlT1  .2807 .0853 .3011  .065  .47
SiT1  .2807 .0853 .3011  .935  .47
AlT2  .2907 .1722 .8114 .1075  .50
SiT2  .2907 .1722 .8114 .8925  .50
H     .2003     0 .7683  .979 1.53
O1    .1080 .0886 .2154        .72
O2    .1186 .1738 .7329        .72
O3    .1094     0 .7144  .979  .81
F3    .1094     0 .7144  .021  .81
O4    .3684 .2498 .7903        .94
O5    .3493 .1389 .1102       1.00
O6    .3431 .1174 .6022       1.03
O7    .3368     0 .2812       1.19