Sr2.83Ta5O15 Siegrist T, Cava R J, Krajewski J J Materials Research Bulletin 32 (1997) 881-887 Reduced alkaline earth tantalates _database_code_amcsd 0014380 12.282 12.282 3.864 90 90 90 P4/mbm atom x y z occ Biso Sr1 0 0 0 .83 3.3 Sr2 .1744 .6744 0 5.8 Ta1 0 .5 .5 1.56 Ta2 .07659 .21119 .5 1.54 O1 0 .5 0 10 O2 .276 .776 .5 2.70 O3 .078 .208 0 4.20 O4 .338 .011 .5 2.5 O5 .140 .066 .5 3.5