Weberite Knop O, Cameron T S, Jochem K Journal of Solid State Chemistry 43 (1982) 213-221 What is the true space group of weberite? Locality: Ivigtut, Greenland Sample: I2_12_12_1 refinement, T = ambient Note: y(F6) and z(F6) corrected _database_code_amcsd 0013481 7.051 9.968 7.285 90 90 90 *I2_12_12_1 0 .25 .5 atom x y z U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Na1 .25 .0003 .5 .0177 .0192 .0553 0 -.0045 0 Na2 -.0027 .25 .75 .0219 .0333 .0149 0 0 .0095 Mg .25 .0006 0 .0074 .0063 .0071 0 -.0008 0 Al .0000 .25 .25 .0078 .0070 .0075 0 0 -.0018 F1 0 0 .8863 .0078 .0191 .0127 -.0029 0 0 F3 -.0016 .1648 .4709 .0184 .0159 .0095 .0035 .0004 .0014 F5 .1830 .1359 .1818 .0145 .0128 .0180 .0098 .0009 -.0061 F6 .3150 .6388 .6791 .0115 .0135 .0155 -.0032 .0025 -.0083