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Andremeyerite |
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Cannillo E, Mazzi F, Rossi G |
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American Mineralogist 73 (1988) 608-612 |
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Crystal structure of andremeyerite, BaFe(Fe,Mn,Mg)Si2O7 |
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7.488 13.785 7.085 90 118.23 90 P2_1/c |
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atom x y z occ B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) |
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Ba .4893 .1434 .2940 .0061 .0011 .0067 -.0002 .0031 -.0002 |
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Fe1 -.0024 .2439 .3058 .0033 .0010 .0056 .0001 .0014 .0000 |
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Fe2 -.0380 .5016 .2115 .92 .0040 .0010 .0065 -.0002 .0019 -.0003 |
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Mg2 -.0380 .5016 .2115 .08 .0040 .0010 .0065 -.0002 .0019 -.0003 |
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SiA .2765 .3908 .2023 .0030 .0010 .0052 .0002 .0012 .0003 |
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SiB .7241 .3833 .3877 .0032 .0008 .0046 .0001 .0016 .0002 |
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O1A .2262 .5001 .1055 .0049 .0013 .0056 .0004 .0006 .0007 |
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O1B .7251 .4833 .2737 .0072 .0014 .0132 .0007 .0058 .0013 |
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O2A .2573 .3118 .0249 .0037 .0019 .0074 -.0006 .0012 -.0022 |
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O2B .7270 .2903 .2481 .0049 .0013 .0143 -.0003 .0046 -.0017 |
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O3A .1229 .3714 .3016 .0063 .0010 .0136 -.0002 .0064 .0006 |
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O3B .9090 .3763 .6290 .0049 .0013 .0091 -.0005 .0010 .0002 |
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O4 .5104 .3784 .4021 .0044 .0014 .0017 -.0003 .0007 .0000 |
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