Zimbabweite
Duesler E N, Chakoumakos B C, Foord E E
American Mineralogist 73 (1988) 1186-1190
Zimbabweite, Na(Pb,Na,K)2As4(Ta,Nb,Ti)4O18, an arsenite-tantalate with a
novel corner-linked octahedral sheet
_database_code_amcsd 0001200
12.245 15.287 8.684 90 90 90 *Ccmb
.25 .25 0
atom      x      y      z  occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Ta1  .81379 .37712 .30173  .75  .0105  .0102  .0092  .0003  .0003  .0006
Nb1  .81379 .37712 .30173 .125  .0105  .0102  .0092  .0003  .0003  .0006
Ti1  .81379 .37712 .30173 .125  .0105  .0102  .0092  .0003  .0003  .0006
Pb2   .4504    .25  .8793   .5  .0137  .0224  .0245      0      0  .0076
K2    .4504    .25  .8793  .25  .0137  .0224  .0245      0      0  .0076
Na2   .4504    .25  .8793  .25  .0137  .0224  .0245      0      0  .0076
Na3     .75    .25      0       .0024  .0029  .0047      0      0  .0015
As    .5855 .42180  .0686       .0118  .0139  .0138  .0004  .0001  .0003
O1    .6669  .3660   .205       .0028  .0021  .0010  .0002  .0000  .0005
O2    .1188  .3535   .586       .0017  .0032  .0010  .0000 -.0001  .0001
O3    .9639  .3642   .386       .0022  .0015  .0020  .0002 -.0001  .0004
O4     .805    .25   .326       .0020  .0012  .0028      0      0  .0000
O5     .826     .5    .25       .0015  .0030  .0013      0  .0001      0
O6      .75   .395     .5       .0022  .0021  .0003      0      0 -.0001