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Olmsteadite |
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Moore P B, Araki T, Kampf A R, Steele I M |
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American Mineralogist 61 (1976) 5-11 |
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Olmstaedite, K2Fe2[Fe2(Nb,Ta)2O4(H2O)4(PO4)4], a new species, its crystal |
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structure and relation to vauxite and montgomeryite |
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7.512 10.000 6.492 90 90 90 Pb2_1m |
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atom x y z occ Biso |
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Nb .27254 .73837 0 .59 .44 |
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Ta .27254 .73837 0 .41 .44 |
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Fe .02061 0 .24183 .77 |
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K .53021 .97416 .5 2.56 |
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P1 .1832 .7412 .5 .61 |
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P2 .3253 .4149 0 .55 |
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O1 .0823 .8729 .5 .87 |
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O2 .0631 .6192 .5 1.79 |
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O3 .3059 .7376 .3090 1.23 |
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O4 .4180 .5547 0 .87 |
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O5 .4723 .3067 0 1.04 |
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O6 .2138 .3978 .1976 .91 |
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O7 .1575 .8999 0 1.16 |
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O8 .0735 .6317 0 1.34 |
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Wat .2524 .1117 .2720 2.52 |
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