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Maghrebite |
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Meisser N, Brugger J, Krivovichev S, Armbruster T, Favreau G |
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European Journal of Mineralogy 24 (2012) 717-726 |
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Description and crystal structure of maghrebite, MgAl2(AsO4)2(OH)2*8H2O, |
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from Aghbar, Anti-Atlas, Morocco: first arsenate in the laueite mineral group |
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Locality: Aghbar, Anti-Atlas, Morocco |
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_database_code_amcsd 0019348 |
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5.4363 10.500 7.075 97.701 110.295 102.021 P-1 |
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atom x y z Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) |
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Mg .5 .5 0 .0133 .0093 .0119 .0235 .0074 .0079 .0082 |
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Al1 0 0 .5 .0108 .0074 .0146 .0131 .0060 .0043 .0059 |
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Al2 0 0 0 .0113 .0072 .0160 .0142 .0074 .0045 .0071 |
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As -.51690 -.16695 -.92788 .0130 .0077 .0174 .0178 .0081 .0054 .0083 |
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Oh1 -.1279 .0075 -.2847 .0148 .010 .023 .015 .009 .004 .009 |
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O2 -.3119 -.1497 -1.0633 .0146 .011 .018 .019 .0075 .008 .0056 |
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O3 -.3702 -.0666 -.6885 .0158 .006 .019 .023 .0061 .004 .007 |
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O4 -.8092 -.1268 -1.0603 .0162 .008 .028 .018 .013 .004 .011 |
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O5 -.6033 -.3275 -.9118 .0193 .013 .018 .029 .006 .009 .008 |
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Ow6 -.0222 .1851 -.5307 .0198 .018 .024 .021 .011 .008 .006 |
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Ow7 -.5981 -.3076 -.5051 .0283 .024 .036 .032 .013 .015 .014 |
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Ow8 -.1690 -.3876 -.0435 .0334 .015 .030 .063 .011 .017 .021 |
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Ow9 -.2589 -.4878 -.6870 .0319 .028 .031 .033 .010 .006 .009 |
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H1 -.110 .160 -.681 .05 |
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H2 .025 -.384 .004 .13 |
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H3 -.166 .210 -.495 .12 |
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H4 -.453 -.228 -.416 .05 |
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H5 -.305 -.536 -.589 .07 |
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H6 -.210 -.400 -.596 .04 |
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H7 -.580 -.316 -.639 .04 |
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H8 -.237 -.309 -.050 .08 |
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H9 -.320 .000 -.361 .12 |
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