Samarskite-(Y)
Britvin S N, Pekov I V, Krzhizhanovskaya M G, Agakhanov A A, Ternes B, Schuller W, Chukanov N V
Physics and Chemistry of Minerals 46 (2019) 727-741
Redefinition and crystal chemistry of samarskite-(Y), YFe3+Nb2O8:
cation-ordered niobate structurally related to layered double tungstates
Sample LS, natural
Locality: Laacher See, Eifel, Rhineland-Palatinate, Germany
_database_code_amcsd 0021078
9.8020 5.6248 5.2073 90 93.406 90 P2/c
atom       x      y      z occ   Uiso
YA         0 .26303    .75 .25 .00623
LaA        0 .26303    .75 .01 .00623
CeA        0 .26303    .75 .03 .00623
NdA        0 .26303    .75 .02 .00623
SmA        0 .26303    .75 .01 .00623
GdA        0 .26303    .75 .01 .00623
DyA        0 .26303    .75 .04 .00623
HoA        0 .26303    .75 .01 .00623
ErA        0 .26303    .75 .02 .00623
YbA        0 .26303    .75 .03 .00623
ThA        0 .26303    .75 .37 .00623
U4+A       0 .26303    .75 .13 .00623
CaA        0 .26303    .75 .03 .00623
Fe3+M     .5 .33655    .75 .73  .0065
Mn2+M     .5 .33655    .75 .18  .0065
NbB   .73465 .18404 .28544 .92 .00585
TiB   .73465 .18404 .28544 .03 .00585
ZrB   .73465 .18404 .28544 .03 .00585
TaB   .73465 .18404 .28544 .01 .00585
WB    .73465 .18404 .28544 .01 .00585
O1    .13815  .0643  .4764      .0101
O2    .13102  .4059  .0999      .0106
O3    .63878  .1207  .5987      .0106
O4    .61212  .3772  .0988      .0120