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Chayesite |
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Alietti E, Brigatti M F, Capedri S, Poppi L |
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Mineralogical Magazine 58 (1994) 655-662 |
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The roedderite-chayesite series from Spanish lamproites: |
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crystal chemical characterization |
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Locality: Cancarix, Albacete province, Spain |
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_database_code_amcsd 0014511 |
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10.122 10.122 14.320 90 90 120 P6/mcc |
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atom x y z occ Biso B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) |
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KC 0 0 .25 .93 1.84 .005271 .005271 .002767 .002635 0 0 |
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NaC 0 0 .25 .07 1.84 .005271 .005271 .002767 .002635 0 0 |
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NaB 1/3 2/3 0 .12 2.0 |
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MgA 1/3 2/3 .25 .86 1.26 .004099 .003969 .001987 .002733 0 0 |
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Fe3+A 1/3 2/3 .25 .14 1.26 .004099 .003969 .001987 .002733 0 0 |
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MgT2 .5 .5 .25 .86 1.09 .002277 .005433 .001487 .002733 0 0 |
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Fe3+T2 .5 .5 .25 .14 1.09 .002277 .005433 .001487 .002733 0 0 |
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SiT1 .23828 .35296 .39076 1.07 .003091 .003481 .001524 .001789 .000060 .000119 |
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O1 .1297 .3938 0 1.85 .007190 .006897 .001524 .003579 0 0 |
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O2 .2194 .2777 .1334 1.74 .005466 .006637 .002365 .004132 .000000 .000060 |
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O3 .1549 .4965 .17246 1.38 .003969 .004360 .001914 .002082 -.000179 -.000339 |
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View JMOL 3-D Structure (permalink) |
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