Ardennite-(As)
Donnay G, Allmann R
Acta Crystallographica B24 (1968) 845-855
Si3O10 groups in the crystal structure of ardennite
_database_code_amcsd 0009340
8.7126 5.8108 18.5214 90 90 90 *Pnmm
0 .25 .25
atom     x      y      z  occ Biso
Mn1  .9441    .25  .1554 .765  .95
Ca1  .9441    .25  .1554 .235  .95
Mn2  .3956    .75  .1600       .95
Al1      0      0      0       .62
Al2     .5      0      0       .76
Mg   .6787 -.0016    .25  .50  .96
Al   .6787 -.0016    .25  .15  .96
Fe   .6787 -.0016    .25  .10  .96
Cu   .6787 -.0016    .25  .03  .96
Si1  .7641    .75  .0970       .37
Si2  .2766    .25  .0951       .59
Si3  .3412    .25    .25       .66
As   .0426    .75    .25 .905  .45
V    .0426    .75    .25 .095  .45
O1   .1284  .0265 -.0828       .82
O2   .6241 -.0207 -.0833       .81
O3   .1127    .25  .0526       .86
O4   .6169    .75  .0415      1.91
O5   .9299 -.0068    .25      1.02
O6   .4431  .0146    .25      1.06
O7   .6817    .75  .1776      0.19
O8   .2232    .25  .1805      1.78
O9   .1540    .75  .1763       .36
OH1  .1128    .75  .0323       .95
OH2  .6149    .25  .0356       .35
OH3  .6973    .25  .1817       .91