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
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
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