Shakhdaraite-(Y)
Pautov L A, Mirakov M A, Sokolova E, Day M C, Hawthorne F C, Schodibekov M A, Karpenko V Y,
Makhmadsharif S, Faiziev A R
The Canadian Mineralogist 60 (2022) 369-382
Shakhdaraite-(Y), ScYNb2O8, from the Leskhozovskaya granitic pegmatite, The Valley
of the Shakhdara River, Southwestern Pamir, Gorno-Badakhshanskii Autonomous Region,
Tajikistan: New mineral description and crystal structure
Locality: Leskhozovskaya granitic pegmatite, The Valley of the Shakhdara River, Tajikistan
_database_code_amcsd 0021089
9.930 5.6625 5.2108 90 92.38 90 P2/c
atom          x      y      z  occ  Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
NbM(1A)  .75537  .3147  .2262  .88 .0136  .0147  .0139  .0118 -.0001 -.0031  .0017
TaM(1A)  .75537  .3147  .2262 .015 .0136  .0147  .0139  .0118 -.0001 -.0031  .0017
TiM(1A)  .75537  .3147  .2262 .005 .0136  .0147  .0139  .0118 -.0001 -.0031  .0017
NbM(1B)    .746   .291   .278 .075  .026   .030   .035   .013  -.001  -.002   .011
SnM(1B)    .746   .291   .278 .025  .026   .030   .035   .013  -.001  -.002   .011
ScM(2)        0 .81831    .25  .83 .0178  .0168  .0202  .0164      0 -.0001      0
TaM(2)        0 .81831    .25  .07 .0178  .0168  .0202  .0164      0 -.0001      0
MnM(2)        0 .81831    .25  .04 .0178  .0168  .0202  .0164      0 -.0001      0
U4+M(2)       0 .81831    .25  .03 .0178  .0168  .0202  .0164      0 -.0001      0
W6+M(2)       0 .81831    .25  .02 .0178  .0168  .0202  .0164      0 -.0001      0
PbM(2)        0 .81831    .25  .01 .0178  .0168  .0202  .0164      0 -.0001      0
YM(3A)       .5  .7706    .25  .53 .0126  .0128  .0151  .0097      0  .0007      0
YbM(3A)      .5  .7706    .25  .07 .0126  .0128  .0151  .0097      0  .0007      0
DyM(3A)      .5  .7706    .25  .06 .0126  .0128  .0151  .0097      0  .0007      0
ErM(3A)      .5  .7706    .25  .03 .0126  .0128  .0151  .0097      0  .0007      0
GdM(3A)      .5  .7706    .25  .02 .0126  .0128  .0151  .0097      0  .0007      0
CeM(3A)      .5  .7706    .25  .01 .0126  .0128  .0151  .0097      0  .0007      0
NdM(3A)      .5  .7706    .25  .01 .0126  .0128  .0151  .0097      0  .0007      0
SmM(3A)      .5  .7706    .25  .01 .0126  .0128  .0151  .0097      0  .0007      0
TbM(3A)      .5  .7706    .25  .01 .0126  .0128  .0151  .0097      0  .0007      0
HoM(3A)      .5  .7706    .25  .01 .0126  .0128  .0151  .0097      0  .0007      0
TmM(3A)      .5  .7706    .25  .01 .0126  .0128  .0151  .0097      0  .0007      0
LuM(3A)      .5  .7706    .25  .01 .0126  .0128  .0151  .0097      0  .0007      0
CaM(3B)      .5   .820    .25  .09  .026   .025   .026   .029      0  .0045      0
MnM(3B)      .5   .820    .25  .06  .026   .025   .026   .029      0  .0045      0
ThM(3B)      .5   .820    .25  .04  .026   .025   .026   .029      0  .0045      0
U4+M(3B)     .5   .820    .25  .03  .026   .025   .026   .029      0  .0045      0
O1        .6247  .0980  .0913      .0274  .0326  .0228  .0269 -.0015  .0025 -.0006
O2        .6381  .5794  .0123      .0394  .0269   .036   .055  .0023 -.0025  .0210
O3        .8621  .3885 -.0824      .0244  .0280  .0201  .0248  .0024 -.0016  .0025
O4        .8855  .1145  .4082      .0240  .0242  .0215  .0262 -.0006 -.0002 -.0039