Roggianite
Giuseppetti G, Mazzi F, Tadini C, Galli E
Neues Jahrbuch fur Mineralogie, Monatshefte 1991 (1991) 307-314
The revised crystal structure of roggianite: Ca2[Be(OH)2Al2Si4O13]<2.5H2O
Locality: Val Vigezzo, Novara, Italy
_database_code_amcsd 0014856
18.33 18.33 9.16 90 90 90 I4/mcm
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   .1769 .1769   .25     .017  .0196  .0196  .0114 -.0070  .0030 -.0030
Be   .2619 .2381     0     .018  .0169  .0169  .0216 -.0009      0      0
O6   .2935 .2065 .1512     .017  .0181 .01818  .0146  .0044 -.0027 0.0027
H1    .324  .176  .145      .03
Al   .2177     0   .25     .011  .0142  .0109  .0064      0      0 -.0016
Si1  .1044 .2810     0     .012  .0140 .01385  .0075 -.0029      0      0
Si2  .1159 .0408     0     .010  .0122  .0101  .0083 -.0005      0      0
O1   .1353 .3647     0     .016  .0140  .0140  .0192 -.0062      0      0
O2   .1641 .0579 .1457     .016  .0226  .0140  .0113 -.0004  .0034 -.0019
O3   .0579 .2673 .1461     .022  .0288  .0240  .0133 -.0126  .0077 -.0022
O4   .0451 .0936     0     .021  .0190  .0233  .0201  .0043      0      0
O5   .1725 .2246     0     .015  .0169  .0149  .0143 -.0034      0      0
Wat1  .409  .091  .154 .49  .14
Wat2  .375  .079     0 .27  .13
Wat3  .445  .055  .264 .41  .22