Povondraite
Grice J D, Ercit T S, Hawthorne F C
American Mineralogist 78 (1993) 433-436
Povondraite, a redefinition of the tourmaline ferridravite
Note: Atomic parameters updated by Grice on 11/20/2001
Locality: San Francisco mine, Villa Tunari, Bolivia
_database_code_amcsd 0001555
16.186 16.186 7.444 90 90 120 R3m
atom     x     y     z  occ  Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
NaX      0     0 .2277  .80  .023  .0171  .0171  .0340 .00855      0      0
KX       0     0 .2277  .20  .023  .0171  .0171  .0340 .00855      0      0
FeY  .1224 .0612 .6429  .85 .0065  .0044  .0036  .0118  .0022 -.0009 -.0005
MgY  .1224 .0612 .6429  .15 .0065  .0044  .0036  .0118  .0022 -.0009 -.0005
FeZ  .2987 .2627 .6124  .72 .0058  .0041  .0041  .0091  .0021  .0005  .0009
MgZ  .2987 .2627 .6124  .23 .0058  .0041  .0041  .0091  .0021  .0005  .0009
AlZ  .2987 .2627 .6124  .05 .0058  .0041  .0041  .0091  .0021  .0005  .0009
SiT  .1892 .1876     0       .006  .0056  .0043  .0097  .0028 -.0010 -.0010
B    .1097 .2194 .4558      .0095  .0118  .0046  .0078  .0023  .0003  .0006
O1       0     0 .7718  .88  .007 .0077  .0077  .0077 .00385      0      0
OH1      0     0 .7718  .12  .007 .0077  .0077  .0077 .00385      0      0
O2   .0610 .1220 .4905       .010 .0101  .0041  .0130  .0020  .0009  .0018
O3   .2578 .1289 .5123       .009 .0122  .0077  .0088  .0061 -.0026 -.0013
O4   .0924 .1848 .0692       .011 .0082  .0156  .0126  .0078 -.0058 -.0029
O5   .1826 .0913 .0866       .010 .0102  .0040  .0183  .0051  .0005  .0002
O6   .1922 .1829 .7838       .008 .0114  .0069  .0083  .0057 -.0004 -.0016
O7   .2811 .2813 .0754       .010 .0086  .0068  .0119  .0020 -.0002 -.0009
O8   .2070 .2679 .4420       .010 .0053  .0097  .0175  .0045  .0038  .0055
H3   .2411 .1205 .4027        .02