Tancoite
Hawthorne F C
Tschermaks Mineralogische und Petrographische Mitteilungen 31 (1983) 121-135
The crystal structure of tancoite
_database_code_amcsd 0015695
6.948 14.089 14.065 90 90 90 Pbcb
atom     x     y     z Biso B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3)
H2    .587  .704  .132  1.0
Na1     .5     0     0  2.2  .0086  .0046  .0015 -.0009 -.0013  .0005
Na2     .5 .5143   .25  2.2  .0110  .0044  .0013      0 -.0017      0
Na3  .0247   .25     0  1.3  .0145  .0014  .0001      0      0 -.0002
Na4      0 .2479   .25  2.1  .0178  .0011  .0025      0 -.0019      0
Li   .2614 .8716 .1258  2.9  .0119  .0009  .0073 -.0012  .0054 -.0010
Al1      0     0     0  .33  .0047  .0004 -.0003  .0002 -.0008  .0001
Al2      0 .5022   .25  .56  .0003  .0006  .0014      0  .0010      0
P1   .2755 .3675 .1271  .65  .0027  .0010  .0008  .0007  .0005  .0001
P2   .2633 .6416 .1200  .49  .0028  .0008  .0004 -.0006 -.0001  .0001
O1   .1852 .0945 .2863   .7  .0037  .0008  .0009 -.0016 -.0003 -.0004
O2   .1776 .4033 .2202   .6  .0037  .0008  .0006  .0015  .0003  .0000
O3   .1829 .5914 .0340  1.2  .0102  .0010  .0010 -.0006 -.0009  .0003
O4   .1643 .5968 .5420   .7  .0050  .0012  .0004 -.0001  .0005  .0000
O5   .2641 .2587 .1293 1.28  .0104  .0008  .0015  .0002 -.0001 -.0002
O6   .1968 .7455 .1200 1.18  .0107  .0007  .0012 -.0005  .0005 -.0001
O7   .4809 .4050 .1270 1.42  .0040  .0029  .0015 -.0002  .0007  .0010
O8   .4828 .6330 .1211 1.22  .0023  .0025  .0015  .0006  .0003  .0008
O9   .1140 .0031 .1217  .68  .0036  .0013  .0004  .0002  .0015  .0000
H1    .184  .065  .147  1.0