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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 = 15 K |
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_database_code_amcsd 0006208 |
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9.9801 9.9801 8.3707 90 90 120 P6_3 |
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atom x y z occ Uiso |
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K 0 0 .0037 .57 .022 |
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Na1 0 0 .0037 .24 .022 |
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Na2 .5554 .9976 .5086 .017 |
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Al1 2/3 1/3 .7010 .48 .012 |
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Si1 2/3 1/3 .7010 .52 .012 |
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Al2 2/3 1/3 .3136 .48 .014 |
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Si2 2/3 1/3 .3136 .52 .014 |
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Al3 .9067 .6658 .8222 .48 .014 |
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Si3 .9067 .6658 .8222 .52 .014 |
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Al4 .9073 .6671 .1961 .48 .012 |
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Si4 .9073 .6671 .1961 .52 .012 |
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O1 .6602 .2797 .5053 1/3 .023 |
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O2 .9732 .6814 .0034 .035 |
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O3 .8287 .4781 .2515 .038 |
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O4 .8365 .4889 .7610 .034 |
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O5 .7746 .7152 .8251 .019 |
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O6 .7762 .7315 .2007 .020 |
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