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Graeserite |
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Berlepsch P, Armbruster T |
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Schweizerische Mineralogische und Petrographische Mitteilungen 78 (1998) 1-9 |
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The crystal structure of Pb2+-bearing graeserite, Pb0.14(Fe,Ti)7AsO12+x(OH)2-x, |
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a mineral of the derbylite group |
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Locality: Gorb, Binn valley, Western Alps, Switzerland |
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5.0053 14.272 7.1736 90 105.165 90 C2/m |
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atom x y z occ Biso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) |
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Pb -.456 .5 .9367 .07 2.5 .002 .018 .043 0 -.017 0 |
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FeM1 0 .5 .5 .5714 .66 .0080 .0059 .0107 0 .0014 0 |
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TiM1 0 .5 .5 .4286 .66 .0080 .0059 .0107 0 .0014 0 |
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FeM2 .5 .62037 .5 .5714 .65 .0086 .0074 .0088 0 .0024 0 |
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TiM2 .5 .62037 .5 .4286 .65 .0086 .0074 .0088 0 .0024 0 |
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FeM3 -.3756 .81093 .8136 .5714 .61 .0078 .0072 .0085 .0013 .0026 .0008 |
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TiM3 -.3756 .81093 .8136 .4286 .61 .0078 .0072 .0085 .0013 .0026 .0008 |
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As -.2515 .5 .9169 .5 .96 .022 .0052 .0079 0 .0003 0 |
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O1 -.2702 .9016 .6626 1.08 .016 .012 .014 .000 .006 -.002 |
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O2 -.2608 .7046 .6798 .94 .012 .013 .011 .000 .004 -.002 |
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O3 .5 .7139 0 .90 .014 .009 .013 0 .005 0 |
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O4 .5 .9041 0 1.17 .020 .010 .016 0 .006 0 |
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O5 -.279 .5 .6500 .5 1.02 .012 .012 .018 0 .010 0 |
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OH5 -.279 .5 .6500 .5 1.02 .012 .012 .018 0 .010 0 |
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