Vinogradovite Kalsbeek N, Ronsbo J G Zeitschrift fur Kristallographie 200 (1992) 237-245 Refinement of the vinogradovite structure, positioning of Be and excess Na Locality: Ilimaussaq, Southern Greenland Note: T = 110 K _database_code_amcsd 0011018 24.490 8.657 5.203 90 100.15 90 C2/c atom x y z occ Biso B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) Ti .34962 .40362 .21244 .93 .00016 .00118 .00361 .00001 .00003 .00018 Nb .34962 .40362 .21244 .07 .00016 .00118 .00361 .00001 .00003 .00018 Si1 .76688 .40830 .72484 .00016 .00103 .00228 .00002 .00003 .00000 Si2 .43553 .89961 .7248 .75 .00019 .00123 .00428 -.00002 .00004 -.00005 Al2 .43553 .89961 .7248 .15 .00019 .00123 .00428 -.00002 .00004 -.00005 Be2 .43553 .89961 .7248 .1 .00019 .00123 .00428 -.00002 .00004 -.00005 Na1 .64896 .1890 .7956 .00049 .00270 .00629 .00029 -.00008 .00062 O1 .5 .8430 .75 .00026 .00246 .01181 0 .00026 0 O2 .42101 .9610 .0046 .00033 .00273 .00915 -.00008 .00048 -.00107 O3 .79185 .5119 .9839 .00020 .00163 .00324 .00002 .00002 -.00056 O4 .61523 .5683 .4519 .00019 .00180 .00324 .00008 -.00002 -.00022 O5 .79233 .2392 .7824 .00022 .00136 .00448 .00015 .00004 .00022 O6 .69991 .4180 .6661 .00016 .00146 .00295 -.00002 -.00006 -.00016 O7 .39548 .7510 .6234 .00030 .00196 .00552 -.00014 .00014 .00016 Wat1 0 .1413 .25 .370 1.8 Wat2 .0078 .914 .642 .534 .00142 .04069 .03621 -.00323 .00162 -.01127 Na2 .4644 .4014 .963 .27 2.5