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Panunzite |
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Merlino S, Franco E, Mattia C A, Pasero M, De Gennaro M |
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Neues Jahrbuch fur Mineralogie, Monatshefte 1985 (1985) 322-328 |
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The crystal structure of panunzite (natural tetrakalsilite) |
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Locality: Somma-Vesuvius area, Italy |
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Note: x(O7) and y(O11) adjusted to match reported bond lengths |
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20.4960 20.4960 8.549 90 90 120 P6_3 |
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atom x y z occ Biso |
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Na -.0196 .2578 .7377 1.19 |
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K1 .5028 .2698 .2405 .88 1.21 |
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Na1 .5028 .2698 .2405 .12 1.21 |
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K2 -.0041 .4759 .2395 .78 .98 |
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Na2 -.0041 .4759 .2395 .22 .98 |
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K3 .2388 .4965 .2453 1.36 |
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K4 .2423 .0286 .2451 .83 1.62 |
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Na4 .2423 .0286 .2451 .17 1.62 |
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K5 0 0 .75 1.56 |
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Al1 .0376 .1598 .5666 .66 |
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Al2 .3282 .1903 .5593 .59 |
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Al3 .3041 .4052 .5583 .55 |
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Al4 .5899 .4272 .5567 .69 |
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Al5 .0673 .4212 .5569 .58 |
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Al6 1/3 2/3 .5541 .42 |
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Si1 .1593 .1223 .4318 .56 |
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Si2 .1380 .3281 .4394 .69 |
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Si3 .4046 .1015 .4380 .77 |
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Si4 .1629 .5892 .4427 .56 |
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Si5 .4208 .3529 .4359 .75 |
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Si6 2/3 1/3 .4475 .55 |
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O1 .1436 .1403 .2534 .75 |
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O2 .1198 .3173 .2532 1.59 |
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O3 .4013 .1187 .2518 1.82 |
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O4 .1510 .5755 .2528 1.77 |
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O5 .4004 .3518 .2548 1.65 |
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O6 2/3 1/3 .2530 1.57 |
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O7 .1403 .4048 .4956 .27 |
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O8 .1082 .1352 .5542 1.06 |
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O9 .3432 .1140 .5284 1.04 |
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O10 .4067 .2715 .4830 1.73 |
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O11 -.0140 .3660 .4458 .95 |
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O12 .4892 .1572 .4930 .46 |
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O13 .1385 .0328 .4365 1.93 |
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O14 .3355 .4962 .4771 1.82 |
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O15 .3710 .3787 .5364 2.04 |
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O16 .2439 .6030 .4841 1.98 |
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O17 .0957 .5125 .5138 .51 |
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O18 .2501 .1814 .4557 2.20 |
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O19 .5104 .4161 .4465 1.21 |
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O20 .5998 .3495 .5035 .59 |
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O21 .0735 .2545 .5236 .61 |
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O22 .2226 .3385 .4578 1.12 |
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