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Mountainite |
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Zubkova N V, Pekov I V, Pushcharovsky D Y, Chukanov N V |
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Zeitschrift fur Kristallographie 224 (2009) 389-396 |
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The crystal structure and refined formula of mountainite, KNa2Ca2[Si8O19(OH)]*6H2O |
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Locality: Yubileinaya pegmatite, Lovozero alkaline complex, Kola Peninsula, Russia |
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_database_code_amcsd 0011131 |
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13.704 6.5760 13.751 90 105.752 90 P2/c |
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atom x y z occ Uiso |
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K 0 .2758 .25 .0292 |
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Na1 .4500 .8466 .5817 .5 .043 |
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Na2 .4317 .7075 .4412 .5 .030 |
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Ca .01912 .2444 .56031 .0129 |
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Si1 .33509 .2235 .64951 .0117 |
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Si2 .2193 .4690 .7635 .0109 |
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Si3 .2042 .1638 .1284 .0118 |
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Si4 .2096 .5042 .9833 .0120 |
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O1 .7958 .2940 .2696 .022 |
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O2 .1192 .3437 .7139 .018 |
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O3 .3196 .3818 .7349 .018 |
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O4 .9034 .0768 .4265 .0225 |
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O5 .2724 .2975 .5383 .020 |
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O6 .2543 .4703 .8860 .016 |
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O7 .7495 .3064 .4441 .017 |
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O8 .2930 .0055 .6734 .021 |
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O9 .4534 .2051 .6583 .5 .022 |
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OH9 .4534 .2051 .6583 .5 .022 |
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O10 .0909 .4634 .4603 .018 |
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Wat11 .9094 .0837 .6512 .023 |
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Wat12 .5 .685 .75 .075 |
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Wat13 .4747 .573 .4691 .5 .038 |
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Wat14 .3600 .050 .3973 .5 .042 |
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Wat15 .5488 .938 .5680 .5 .055 |
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