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-1100, after annealing at 1100 C
Locality: Laacher See, Eifel, Rhineland-Palatinate, Germany
_database_code_amcsd 0021079
9.8006 5.6254 5.2154 90 93.481 90 P2/c
atom      x      y      z occ  Uiso
YA        0 .26284    .75 .25 .0045
LaA       0 .26284    .75 .01 .0045
CeA       0 .26284    .75 .03 .0045
NdA       0 .26284    .75 .02 .0045
SmA       0 .26284    .75 .01 .0045
GdA       0 .26284    .75 .01 .0045
DyA       0 .26284    .75 .04 .0045
HoA       0 .26284    .75 .01 .0045
ErA       0 .26284    .75 .02 .0045
YbA       0 .26284    .75 .03 .0045
ThA       0 .26284    .75 .37 .0045
U4+A      0 .26284    .75 .13 .0045
CaA       0 .26284    .75 .03 .0045
Fe3+M    .5 .33682    .75 .73 .0052
Mn2+M    .5 .33682    .75 .18 .0052
NbB   .7342 .18354 .28542 .92 .0039
TiB   .7342 .18354 .28542 .03 .0039
ZrB   .7342 .18354 .28542 .03 .0039
TaB   .7342 .18354 .28542 .01 .0039
WB    .7342 .18354 .28542 .01 .0039
O1    .1377  .0641  .4760     .0082
O2    .1312  .4051  .1001     .0093
O3    .6394  .1208  .5991     .0091
O4    .6126  .3764  .0990     .0104