Effenbergerite Giester G, Rieck B Mineralogical Magazine 58 (1994) 663-670 Effenbergerite, BaCu[Si4O10], a new mineral from the Kalahari Manganese Field, South Africa: description and crystal structure Locality: Wessels mine, Kalahari Manganese Field, South Africa _database_code_amcsd 0018763 7.442 7.442 16.133 90 90 90 *P4/ncc .25 -.25 0 atom x y z Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Cu .25 .25 .09448 .0101 .0078 .0078 .0146 0 0 0 Ba .25 .75 0 .0135 .0154 .0154 .0098 0 0 0 Si .51860 .93877 .15462 .0096 .0088 .0091 .0109 -.0012 .0010 -.0001 O1 .4758 .9758 .25 .0331 .0403 .0403 .0188 -.0131 .0131 -.0093 O2 .7244 .9991 .1364 .0192 .0100 .0264 .0212 .0058 -.0007 -.0016 O3 .3877 .0311 .0903 .0192 .0181 .0115 .0300 -.0025 -.0096 .0056