Pyatenkoite-(Y)
Rastsvetaeva R K, Khomyakov A P
Doklady Chemistry 351 (1996) 283-286
Crystal structure of pyatenkoite-(Y) Na5YTiSi6O18*6H2O, a new mineral of the
hilairite group: crystal structure
Locality: Lovozero massif, Kola Peninsula, Russia
_database_code_amcsd 0012500
10.696 10.696 15.728 90 90 120 R32
atom     x     y     z occ Biso
Na1      0     0 .1933      2.2
Na2   .365     0    .5      3.1
YM2    1/3   2/3   1/6  .5 1.01
DyM2   1/3   2/3   1/6  .3 1.01
GdM2   1/3   2/3   1/6  .2 1.01
TiM1     0     0     0  .8  .78
NbM1     0     0     0  .2  .78
Si   .4228 .4073 .2476      .69
O1    .092  .168 .0749      1.2
O2    .103  .211 .5720      1.3
O3    .657     0     0      1.0
O4    .641     0    .5      1.8
Ow5   .503  .144 .0589      1.8
H1     .53   .43   .04      2.0
H2     .48   .68     0      2.0