Orthoclase Viswanathan K, Kielhorn H M American Mineralogist 68 (1983) 122-124 Al,Si distribution in a ternary (Ba,K,Na)-feldspar as determined by crystal structure refinement Note: variety hyalophane Locality: Yugoslavia _database_code_amcsd 0019651 8.544 13.030 7.195 90 115.68 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) Al1 .0089 .1835 .2242 .437 0.0039 0.0011 0.0029 -.0004 0.0024 -.0002 Si1 .0089 .1835 .2242 .563 0.0039 0.0011 0.0029 -.0004 0.0024 -.0002 Al2 .7050 .1179 .3454 .268 0.0035 0.0008 0.0036 -.0001 0.0021 0.0000 Si2 .7050 .1179 .3454 .732 0.0035 0.0008 0.0036 -.0001 0.0021 0.0000 Ba .2828 0 .1331 .400 0.0048 0.0024 0.0084 0 0.0027 0 K .2828 0 .1331 .470 0.0048 0.0024 0.0084 0 0.0027 0 Na .2828 0 .1331 .130 0.0048 0.0024 0.0084 0 0.0027 0 Oa1 0 .1428 0 0.0078 0.0017 0.0064 0 0.0048 0 Oa2 .6264 0 .2867 0.0061 0.0008 0.0088 0 0.0022 0 Ob .8273 .1415 .2274 0.0069 0.0026 0.0091 -.0007 0.0053 0.0002 Oc .0303 .3104 .2558 0.0064 0.0015 0.0088 -.0005 0.0041 -.0004 Od .1842 .1261 .4030 0.0039 0.0011 0.0029 -.0004 0.0024 -.0002