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(5)
_database_code_amcsd 0006603
9.869 18.058 5.320 90 105.03 90 C2/m
atom      x     y     z   occ Biso
NaA       0   1/2     0  .078 3.54
KA        0   1/2     0   .02 3.54
NaAm  .0362   1/2 .0719  .078 4.89
KAm   .0362   1/2 .0719   .02 4.89
NaA2      0 .4670     0  .078 1.90
KA2       0 .4670     0   .02 1.90
FeM1      0 .0888   1/2   .31  .57
MgM1      0 .0888   1/2   .69  .57
AlM2      0 .1779     0   .15  .52
TiM2      0 .1779     0  .105  .52
FeM2      0 .1779     0  .245  .52
MgM2      0 .1779     0    .5  .52
AlM3      0     0     0   .05  .51
FeM3      0     0     0   .35  .51
MgM3      0     0     0    .6  .51
CaM4      0 .2798   1/2 .4625  .83
NaM4      0 .2798   1/2   .01  .83
MnM4      0 .2798   1/2  .005  .83
FeM4      0 .2798   1/2 .0225  .83
CaM4'     0 .2541   1/2 .4625  .70
NaM4'     0 .2541   1/2   .01  .70
MnM4'     0 .2541   1/2  .005  .70
FeM4'     0 .2541   1/2 .0225  .70
SiT1  .2806 .0852 .3007 .9475  .44
AlT1  .2806 .0852 .3007 .0525  .44
SiT2  .2906 .1721 .8111  .925  .48
AlT2  .2906 .1721 .8111  .075  .48
H     .1903     0 .7648  .979 2.94
O1    .1080 .0888 .2152        .73
O2    .1187 .1738 .7327        .71
O3    .1095     0 .7141  .979  .79
F3    .1095     0 .7141  .021  .79
O4    .3685 .2496 .7906        .93
O5    .3492 .1386 .1095        .96
O6    .3429 .1177 .6012       1.00
O7    .3360     0 .2821       1.14