Osumilite-(Mg)
Chukanov N V, Pekov I V, Rastsvetaeva R K, Aksenov S M, Belakovskiy D I,
Van K V, Schuller V, Ternes B
Zapiski Rossiiskogo Mineralogicheskogo Obshchetstva 141 (2012) 27-36
Osumilite-(Mg): Validation as a mineral species and new data
Locality: Bellerberg, Eifel volcanic area, Germany
_database_code_amcsd 0020038
10.0959 10.0959 14.3282 90 90 120 P6/mcc
atom     x     y     z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
K        0     0   .25 .72  .0299  .0299  .0352  .0150      0      0
Na       0     0   .25 .03  .0299  .0299  .0352  .0150      0      0
Ca       0     0   .25 .01  .0299  .0299  .0352  .0150      0      0
Mg     1/3   2/3   .25 .98  .0048  .0048  .0072  .0024      0      0
Mn     1/3   2/3   .25 .02  .0048  .0048  .0072  .0024      0      0
Al      .5     0   .25 .85  .0185  .0083  .0116  .0042      0      0
Fe3+    .5     0   .25 .15  .0185  .0083  .0116  .0042      0      0
Si   .1059 .3533 .1077 .86  .0082  .0104  .0077  .0050 -.0001 -.0014
Al   .1059 .3533 .1077 .14  .0082  .0104  .0077  .0050 -.0001 -.0014
O1   .1226 .4073     0      .0267  .0209  .0099  .0113      0      0
O2   .2173 .2850 .1309      .0248  .0317  .0257  .0226  .0005 -.0019
O3   .1407 .4936 .1788      .0152  .0158  .0133  .0090 -.0030 -.0049