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Roedderite |
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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 0014514 |
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10.126 10.126 14.326 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 .80 1.61 .005006 .005006 .002144 .002503 0 0 |
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NaC 0 0 .25 .20 1.61 .005006 .005006 .002144 .002503 0 0 |
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NaB 1/3 2/3 -.0190 .11 1.5 |
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MgA 1/3 2/3 .25 .85 0.76 .002308 .002308 .001035 .001170 0 0 |
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Fe3+A 1/3 2/3 .25 .15 0.76 .002308 .002308 .001035 .001170 0 0 |
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MgT2 .5 .5 .25 .85 0.85 .001918 .005104 .000877 .002536 0 0 |
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Fe3+T2 .5 .5 .25 .15 0.85 .001918 .005104 .000877 .002536 0 0 |
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SiT1 .23814 .35284 .39067 0.77 .002568 .002828 .000877 .001495 .000099 .000139 |
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O1 .1299 .3943 0 1.61 .006957 .005624 .001157 .003121 0 0 |
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O2 .2197 .2778 .13331 1.46 .004681 .005657 .001973 .003576 -.000020 .000040 |
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O3 .1551 .4967 .17248 1.07 .003381 .003478 .001328 .001723 -.000199 -.000458 |
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