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Alumoakermanite |
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Wiedenmann D, Zaitsev A N, Britvin S N, Krivovichev S V, Keller J |
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Mineralogical Magazine 73 (2009) 373-384 |
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Alumoakermanite, (Ca,Na)2(Al,Mg,Fe2+)(Si2O7), a new mineral from the active |
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carbonatite-nephelinite-phonolite volcano Oldoinyo Lengai, northern Tanzania |
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Locality: Oldoinyo Lengai, northern Tanzania |
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_database_code_amcsd 0020206 |
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7.7661 7.7661 5.0297 90. 90. 90. P-42_1m |
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atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) |
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Ca1 .66382 .83618 .49132 .76 .0182 .0204 .0204 .0138 .0063 -.0016 -.0016 |
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Na1 .66382 .83618 .49132 .24 .0182 .0204 .0204 .0138 .0063 -.0016 -.0016 |
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Al2 0 0 0 .50 .0125 .0111 .0111 .0154 0 0 0 |
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Fe2 0 0 0 .30 .0125 .0111 .0111 .0154 0 0 0 |
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Mg2 0 0 0 .20 .0125 .0111 .0111 .0154 0 0 0 |
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Si .85952 .64048 .05699 .01169 .0122 .0122 .0106 .0014 .0002 .0002 |
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O1 .5 0 .8240 .0237 .0293 .0293 .012 -.017 0 0 |
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O2 .85812 .64188 .7411 .0246 .0301 .0301 .0136 .0063 .0025 .0025 |
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O3 .9172 .81825 .2026 .0257 .0372 .0186 .0214 -.0074 .0053 -.0045 |
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Download diffraction data (View Text File)
View JMOL 3-D Structure (permalink) |
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