Microcline
Ribbe P H
American Mineralogist 64 (1979) 402-408
The structure of a strained intermediate microcline in cryptoperthitic
association with twinned plagioclase
feldspar
Locality: Kongnat syenite, SW Greenland
_database_code_amcsd 0000714
8.643 12.929 7.190 90.1 116.2 89.6 C-1
atom     x     y     z occ B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3)
K    .2867 .9985 .1406      .0070  .0038  .0155  .0003  .0039  .0002
Si1o .0095 .1844 .2225 .75  .0051  .0009  .0064  .0002  .0031  .0002
Al1o .0095 .1844 .2225 .25  .0051  .0009  .0064  .0002  .0031  .0002
Si1m .0091 .8168 .2249 .75  .0052  .0007  .0063  .0006  .0029  .0005
Al1m .0091 .8168 .2249 .25  .0052  .0007  .0063  .0006  .0029  .0005
Si2o .7105 .1184 .3413 .75  .0054  .0005  .0076  .0001  .0028  .0006
Al2o .7105 .1184 .3413 .25  .0054  .0005  .0076  .0001  .0028  .0006
Si2m .7095 .8826 .3433 .75  .0054  .0007  .0087  .0001  .0028  .0001
Al2m .7095 .8826 .3433 .25  .0054  .0007  .0087  .0001  .0028  .0001
Oa1  .0005 .1440 .9977      .0111  .0018  .0159  .0000  .0066  .0006
Oa2  .6382 .0011 .2809      .0092  .0018  .0119  .0004  .0018  .0009
Obo  .8251 .1472 .2228      .0103  .0038  .0159 -.0011  .0078  .0006
Obm  .8278 .8534 .2274      .0108  .0043  .0140  .0002  .0068  .0000
Oco  .0367 .3116 .2580      .0080  .0021  .0150 -.0003  .0046 -.0009
Ocm  .0378 .6903 .2602      .0078  .0014  .0141  .0004  .0039  .0009
Odo  .1815 .1240 .4075      .0109  .0012  .0126  .0001  .0040  .0006
Odm  .1790 .8749 .4085      .0096  .0016  .0135  .0002  .0038  .0000