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American Mineralogist Crystal Structure Database

1 matching records for this search.

Belkovite
Download hom/belkovite.pdf 
Choisnet J, Nguyen N, Groult D, Raveau B
  
Materials Research Bulletin 11 (1976) 887-894
De nouveaux oxydes a reseau forme d'octahedres NbO6 (TaO6) et de groupes Si2O7:
Les phases A3Ta6Si4O26 (A = Ba,Sr) et K6M6Si4O26 (M = Nb,Ta)
Locality: synthetic
_database_code_amcsd 0014242
8.981 8.981 7.840 90 90 120 P-62m
atom    x    y    z Biso
Ba   .593    0   .5    0
Nb   .238    0 .239    0
Si    1/3  2/3 .203  .25
O1    1/3  2/3    0  .61
O2   .273    0    0  .69
O3   .819    0 .236  .74
O4   .489 .183 .284  .48
O5   .227    0   .5  .68


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