Sanidine Viswanathan K, Brandt K American Mineralogist 65 (1980) 472-476 The crystal structure of ternary (Ba,K,Na)-feldspar and its significance Locality: Otjosondu, Namibia _database_code_amcsd 0000781 8.516 13.023 7.206 90 115.9 90 C2/m atom x y z occ B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) Si1 .0087 .1831 .2240 .705 0.0055 0.0014 0.0041 -.0005 0.0027 -.0003 Al1 .0087 .1831 .2240 .295 0.0055 0.0014 0.0041 -.0005 0.0027 -.0003 Si2 .7046 .1175 .3445 .705 0.0052 0.0012 0.0052 0.0000 0.0024 0.0001 Al2 .7046 .1175 .3445 .295 0.0052 0.0012 0.0052 0.0000 0.0024 0.0001 K .2826 0 .1345 .590 0.0067 0.0033 0.0114 0 0.0031 0 Na .2826 0 .1345 .220 0.0067 0.0033 0.0114 0 0.0031 0 Ba .2826 0 .1345 .190 0.0067 0.0033 0.0114 0 0.0031 0 Oa1 0 .1429 0 0.0107 0.0023 0.0094 0 0.0055 0 Oa2 .6273 0 .2864 0.0093 0.0016 0.0109 0 0.0029 0 Ob .8260 .1422 .2270 0.0089 0.0037 0.0120 -.0006 0.0064 0.0000 Oc .0308 .3101 .2567 0.0081 0.0022 0.0100 -.0005 0.0038 -.0005 Od .1841 .1254 .4045 0.0085 0.0024 0.0072 -.0003 0.0023 0.0004