Natrochalcite Chevrier G, Giester G, Zemann J Zeitschrift fur Kristallographie 206 (1993) 7-14 Neutron refinements of NaCu2(H3O2)(SO4)2 and RbCu2(H3O2)(SeO4)2: Variation of the hydrogen bond system in the natrochalcite-type series Locality: synthetic _database_code_amcsd 0011040 8.809 6.187 7.509 90 118.74 90 C2/m atom x y z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Na 0 .5 .5 .0152 .0389 .0170 0 .0037 0 Cu .25 .25 0 .0053 .0052 .0072 .0003 .0021 -.0011 S .0909 0 .3013 .0048 .0059 .0035 0 .0012 0 O1 .1931 0 .1919 .0131 .0118 .0145 0 .0109 0 O2 .2091 0 .5177 .0137 .0163 .0048 0 -.0004 0 O3 -.0201 .1967 .2440 .0073 .0077 .0107 .0014 .0020 -.0002 Oh .1576 .5 .0754 .0056 .0069 .0076 0 .0033 0 H1 .0169 .5 .0069 .5 .0072 .0169 .0231 0 .0102 0 H2 .2070 .5 .2239 .0222 .0248 .0148 0 .0087 0