Scottyite
Yang H, Downs R T, Evans S H, Pinch W W
American Mineralogist 98 (2013) 478-484
Scottyite, the natural analog of synthetic BaCu2Si2O7,
a new mineral from the Wessels mine, Kalahari Manganese Fields, South Africa
Locality: Wessels mine, Kalahari Manganese Fields, South Africa
_database_code_amcsd 0019774
6.8556 13.1725 6.8901 90 90 90 Pnma
atom      x      y      z   Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Ba   .01303    .25 .45688 .00970  .0089  .0108  .0095      0 -.0008      0
Cu   .27762 .00417 .20631 .00714  .0089  .0057  .0068  .0014 -.0023 -.0008
Si   .49765 .13406 .52716  .0057  .0066  .0047  .0057 .00039  .0004 -.0000
O1    .4044    .25  .5167  .0087  .0084  .0057  .0120      0 -.0004      0
O2    .1725  .1337  .1306  .0104  .0122  .0068  .0122  .0022 -.0053 -.0003
O3    .5590  .1121  .7486  .0111  .0152  .0098  .0083  .0048 -.0031 -.0017
O4    .3173  .0596  .4658  .0078  .0105  .0076  .0053 -.0022  .0007 -.0010