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Perhamite |
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Mills S, Mumme G, Grey I, Bordet P |
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Mineralogical Magazine 70 (2006) 201-209 |
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The crystal structure of perhamite |
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Note: H positions unknown |
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Locality: Emmons mine, Greenwood, Maine |
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7.021 7.021 20.218 90 90 120 P-3m1 |
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atom x y z occ Uiso |
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Ca1 0 0 0 .7 .015 |
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Sr 0 0 0 .3 .015 |
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Ca2 1/3 2/3 .7446 .0193 |
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P1 1/3 2/3 .9829 .0085 |
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P2 0 0 .2470 .0088 |
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Al1 .1657 .3314 .8693 .0082 |
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Al2 0 0 .4071 .85 .0196 |
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Si1 0 0 .4071 .15 .0196 |
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Si2 .1573 .7508 .4991 .225 .020 |
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O1 .4288 .2144 .0435 .011 |
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O2 1/3 2/3 .0580 .012 |
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O3 .1262 .2524 .1085 .009 |
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O4 .9137 .4569 .1591 .010 |
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O5 .2394 .1197 .2231 .011 |
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O6 0 0 .3231 .021 |
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O7 .269 .135 .4357 .5 .047 |
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O8 .134 .268 .4339 .5 .060 |
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O9 .5 0 .5 .234 .22 |
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O10 1/3 2/3 .496 .08 .08 |
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Wat1 1/3 2/3 .2366 .056 |
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Wat2 .969 .4847 .3351 .5 .037 |
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