Graeserite
Berlepsch P, Armbruster T
Schweizerische Mineralogische und Petrographische Mitteilungen 78 (1998) 1-9
The crystal structure of Pb2+-bearing graeserite, Pb0.14(Fe,Ti)7AsO12+x(OH)2-x,
a mineral of the derbylite group
Locality: Gorb, Binn valley, Western Alps, Switzerland
_database_code_amcsd 0015412
5.0053 14.272 7.1736 90 105.165 90 C2/m
atom      x      y     z   occ Biso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Pb    -.456     .5 .9367   .07  2.5   .002   .018   .043      0  -.017      0
FeM1      0     .5    .5 .5714  .66  .0080  .0059  .0107      0  .0014      0
TiM1      0     .5    .5 .4286  .66  .0080  .0059  .0107      0  .0014      0
FeM2     .5 .62037    .5 .5714  .65  .0086  .0074  .0088      0  .0024      0
TiM2     .5 .62037    .5 .4286  .65  .0086  .0074  .0088      0  .0024      0
FeM3 -.3756 .81093 .8136 .5714  .61  .0078  .0072  .0085  .0013  .0026  .0008
TiM3 -.3756 .81093 .8136 .4286  .61  .0078  .0072  .0085  .0013  .0026  .0008
As   -.2515     .5 .9169    .5  .96   .022  .0052  .0079      0  .0003      0
O1   -.2702  .9016 .6626       1.08   .016   .012   .014   .000   .006  -.002
O2   -.2608  .7046 .6798        .94   .012   .013   .011   .000   .004  -.002
O3       .5  .7139     0        .90   .014   .009   .013      0   .005      0
O4       .5  .9041     0       1.17   .020   .010   .016      0   .006      0
O5    -.279     .5 .6500    .5 1.02   .012   .012   .018      0   .010      0
OH5   -.279     .5 .6500    .5 1.02   .012   .012   .018      0   .010      0