Post J E, Bish D L
American Mineralogist 73 (1988) 861-869
Rietveld refinement of the todorokite structure
Sample: South Africa Ka
9.764 2.8416 9.551 90 94.06 90 P2/m
atom x y z occ Biso
Mn1 .5 .5 0 .8
Mn2 .764 0 .002 .8
Mn3 0 0 .5 .8
Mn4 .974 .5 .765 .8
O1 .178 .5 .119 1.0
O2 .418 0 .079 1.0
O3 .665 .5 .09 1.0
O4 .917 0 .15 1.0
O5 .913 .5 .407 1.0
O6 .88 0 .649 1.0
OH7 .363 0 .353 .92 5.0
OH8 .696 .5 .38 .42 5.0
OH9 .5 .5 .5 .48 5.0
Sample: South Africa Kb
9.763 2.8454 9.559 90 94.16 90 P2/m
Mn2 .766 0 .001 .8
Mn4 .975 .5 .768 .8
O1 .176 .5 .117 1.0
O2 .419 0 .066 1.0
O3 .649 .5 .08 1.0
O4 .932 0 .148 1.0
O5 .902 .5 .4 1.0
O6 .895 0 .653 1.0
OH7 .405 0 .414 .86 5.0
OH8 .644 .5 .385 .9 5.0
OH9 .5 .5 .5 .64 5.0
Sample: Cuba
9.789 2.834 9.551 90 93.7 90 P2/m
atom x y z Biso
Mn4 .99 .5 .759 .8
O1 .18 .5 .116 1.0
O2 .403 0 .069 1.0
O3 .663 .5 .11 1.0
O4 .908 0 .15 1.0
O5 .993 .5 .472 1.0
O6 .889 0 .666 1.0
Post J E, Heaney P J, Hanson J C
American Mineralogist 88 (2003) 142-150
Synchrotron X-ray diffraction study of the structure and dehydration
behavior of todorokite
9.769 2.8512 9.560 90 94.47 90 P2/m
atom x y z occ Uiso
Mn1 .5 .5 0 .028
Mn2 .7638 0 .0002 .028
Mn3 0 0 .5 .028
Mn4 .9725 .5 .7650 .028
O1 .148 .5 .084 .048
O2 .418 0 .096 .048
O3 .669 .5 .102 .048
O4 .910 0 .150 .048
O5 .905 .5 .395 .048
O6 .890 0 .650 .048
Wat1 .421 0 .391 .84 .048
Wat2 .655 .5 .373 1.18 .048
Wat3 .626 .5 .672 .61 .048
Mg .5 .5 .5 .47 .048
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Total number of retrieved datasets: 4 View in amc, download in amc
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