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Nepheline |
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Angel R J, Gatta G C, Boffa Ballaran T, Carpenter M A |
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The Canadian Mineralogist 46 (2008) 1465-1476 |
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The mechanism of coupling in the modulated structure of nepheline |
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Locality: Snipe River, Tambani, Malawi |
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Note: annealed |
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Note: T = 150 K |
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_database_code_amcsd 0006206 |
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9.9698 9.9698 8.3615 90 90 120 P6_3 |
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atom x y z occ Uiso |
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K 0 0 .0029 .57 .024 |
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Na1 0 0 .0029 .24 .024 |
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Na2 .5550 .9978 .5082 .017 |
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All 2/3 1/3 .7017 .48 .01 |
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Sil 2/3 1/3 .7017 .52 .01 |
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Al2 2/3 1/3 .3124 .48 .011 |
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Si2 2/3 1/3 .3124 .52 .011 |
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Al3 .9067 .6662 .8226 .48 .010 |
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Si3 .9067 .6662 .8226 .52 .010 |
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Al4 .9073 .6677 .1958 .48 .009 |
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Si4 .9073 .6677 .1958 .52 .009 |
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O1 .6623 .2875 .5015 1/3 .024 |
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O2 .9745 .6837 .0023 .028 |
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O3 .8273 .4771 .2517 .033 |
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O4 .8377 .4894 .7635 .029 |
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O5 .7739 .7143 .8255 .014 |
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O6 .7767 .7333 .2008 .016 |
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