Bityite
Gatta G D, Nenert G, Guastella G, Lotti P, Guastoni A, Rizzato S
Mineralogical Magazine 78 (2014) 55-72
A single-crystal neutron and X-ray diffraction study of a Li,Be-bearing brittle mica
Note: Neutron, T = 20 K
Locality: Harding pegmatite, New Mexico, USA
_database_code_amcsd 0020140
5.0590 8.7909 19.0176 90 95.459 90 C2/c
atom       x      y       z  occ  Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Ca         0  .0924     .25  .81 .0076 -.0064  .0084  .0081      0  .0012      0
Na         0  .0924     .25  .19 .0076 -.0064  .0084  .0081      0  .0012      0
LiM1     .25    .75       0 .291  .003
AlM2   .7465  .9154   .9997      .0031  .0025  .0027  .0042 -.0003  .0002  .0013
AlT1   .4654  .9251   .1440  .48 .0033  .0020  .0028  .0050 -.0003  .0002 -.0002
SiT1   .4654  .9251   .1440  .50 .0033  .0020  .0028  .0050 -.0003  .0002 -.0002
BeT1   .4654  .9251   .1440  .02 .0033  .0020  .0028  .0050 -.0003  .0002 -.0002
AlT2   .4554  .2551   .1440 .452 .0024  .0018  .0028  .0027  .0003 -.0002 -.0005
SiT2   .4554  .2551   .1440 .452 .0024  .0018  .0028  .0027  .0003 -.0002 -.0005
BeT2   .4554  .2551   .1440  .06 .0024  .0018  .0028  .0027  .0003 -.0002 -.0005
O1    .95655 .44037  .05592      .0061  .0042  .0057  .0083  .0014  .0000 -.0012
O2    .39055 .25211  .05585      .0059  .0061  .0045  .0071  .0010  .0008  .0004
O3    .36028 .08880  .17679      .0071  .0068  .0086  .0063 -.0001  .0020  .0007
O4    .28033 .77942  .16820      .0066  .0077  .0054  .0065  .0009  .0002  .0002
O5    .28007 .39346  .17817      .0063  .0077  .0052  .0058 -.0004 -.0002 -.0012
O6    .45186 .56632  .05081      .0056  .0055  .0040  .0074 -.0008  .0020 -.0003
H1     .0618  .3663   .6559 .562  .028   .017   .016   .051   .001   .012  -.013
H2     .0992  .4418   .5943 .274  .034   .035   .051   .019  -.011   .013  -.014