Sanidine Ohashi Y, Finger LW Carnegie Institution of Washington: Yearbook 73 (1974) 539-544 Refinement of the crystal structure of sanidine at 25 and 400C Note: T = 25 C Locality: Laacher See, Eifel District, Germany _database_code_amcsd 0020564 8.543 13.021 7.183 90 115.980 90 C2/m atom x y z occ Biso K .2840 0 .1371 .86 2.15 Na .2840 0 .1371 .14 2.15 SiT1 .0093 .1844 .2238 .68 .83 AlT1 .0093 .1844 .2238 .32 .83 SiT2 .7076 .1177 .3443 .82 .83 AlT2 .7076 .1177 .3443 .18 .83 Oa1 0 .1461 0 1.59 Oa2 .6340 0 .2855 1.59 Ob .8277 .1454 .2278 1.82 Oc .0388 .3098 .2577 1.44 Od .1812 .1264 .4052 1.49