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Annite |
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Brigatti M F, Frigieri P, Ghezzo c, Poppi L |
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American Mineralogist 85 (2000) 436-448 |
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Crystal chemistry of Al-rich biotites coexisting with muscovites in |
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peraluminous granites |
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Sample: GFS15a |
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Locality: Sos Canales pluton, Sardinia Island, Italy |
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_database_code_amcsd 0002386 |
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5.339 9.232 10.208 90 100.30 90 C2/m |
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atom x y z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) |
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KA 0 .5 0 .96 .0283 .0103 .0086 0 .00345 0 |
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NaA 0 .5 0 .02 .0283 .0103 .0086 0 .00345 0 |
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CaA 0 .5 0 .03 .0283 .0103 .0086 0 .00345 0 |
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BaA 0 .5 0 .01 .0283 .0103 .0086 0 .00345 0 |
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Fe2+1 0 0 .5 .66 .0085 .0028 .0043 0 .0028 0 |
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Mg1 0 0 .5 .17 .0085 .0028 .0043 0 .0028 0 |
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Fe2+2 0 .3331 .5 .36 .0069 .00306 .00391 0 .0018 0 |
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Mg2 0 .3331 .5 .28 .0069 .00306 .00391 0 .0018 0 |
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Ti2 0 .3331 .5 .07 .0069 .00306 .00391 0 .0018 0 |
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Al2 0 .3331 .5 .29 .0069 .00306 .00391 0 .0018 0 |
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SiT .0758 .16694 .22642 .67 .0085 .00367 .00387 -.0001 .0022 .0001 |
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AlT .0758 .16694 .22642 .33 .0085 .00367 .00387 -.0001 .0022 .0001 |
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O1 .0162 0 .1700 .0200 .0049 .00567 0 .0009 0 |
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O2 .3264 .2315 .1692 .0163 .0078 .0056 -.0027 .0039 -.0004 |
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O3 .1322 .1685 .3920 .0173 .0051 .0040 .0002 .0021 .0000 |
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OH4 .1285 .5 .3969 .78 .0156 .0058 .0039 0 .0024 0 |
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O4 .1285 .5 .3969 .06 .0156 .0058 .0039 0 .0024 0 |
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F4 .1285 .5 .3969 .16 .0156 .0058 .0039 0 .0024 0 |
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