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Oxy-chromium-dravite |
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Bosi F, Reznitskii L, Skogby H |
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American Mineralogist 97 (2012) 2024-2030 |
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Oxy-chromium-dravite, NaCr3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O, |
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a new mineral species of the tourmaline supergroup |
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Locality: Pereval marble quarry, Sludyanka, Lake Baikal, Russia |
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_database_code_amcsd 0019734 |
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16.1121 16.1121 7.3701 90 90 120 R3m |
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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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NaX 0 0 .2270 .0240 .0255 .0255 .0212 .0127 0 0 |
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CrY .123083 .061541 .63874 .650 .00487 .00427 .00430 .00604 .00213 -.00037 -.00019 |
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VY .123083 .061541 .63874 .290 .00487 .00427 .00430 .00604 .00213 -.00037 -.00019 |
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MgY .123083 .061541 .63874 .047 .00487 .00427 .00430 .00604 .00213 -.00037 -.00019 |
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TiY .123083 .061541 .63874 .013 .00487 .00427 .00430 .00604 .00213 -.00037 -.00019 |
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CrZ .297600 .261475 .60855 .562 .00455 .00414 .00464 .00480 .00215 -.00014 .00033 |
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MgZ .297600 .261475 .60855 .322 .00455 .00414 .00464 .00480 .00215 -.00014 .00033 |
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AlZ .297600 .261475 .60855 .116 .00455 .00414 .00464 .00480 .00215 -.00014 .00033 |
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B .10930 .21861 .4548 .0063 .0054 .0056 .0080 .0028 .0004 .0008 |
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Si .189436 .187762 0 .983 .00489 .00451 .00431 .00567 .00208 -.00024 -.00035 |
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Al .189436 .187762 0 .017 .00489 .00451 .00431 .00567 .00208 -.00024 -.00035 |
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O1 0 0 .7649 .54 .0059 .0048 .0048 .0080 .0024 0 0 |
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F1 0 0 .7649 .46 .0059 .0048 .0048 .0080 .0024 0 0 |
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O2 .06015 .12030 .49116 .00532 .0044 .0041 .0074 .0021 .00066 .0013 |
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O3 .25501 .12751 .50900 .00814 .0096 .0089 .0062 .0048 .0013 .00064 |
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H3 .2507 .1253 .376 .89 .012 |
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O4 .09250 .18500 .07148 .0091 .0068 .0150 .0083 .0075 -.0002 -.0004 |
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O5 .18209 .09105 .09007 .00848 .0138 .0060 .0081 .0069 .0007 .00035 |
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O6 .19072 .18146 .78133 .00620 .0075 .0060 .0046 .0030 -.0001 -.0005 |
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O7 .28246 .28199 .07220 .00794 .0067 .0059 .0084 .0011 -.0016 -.0015 |
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O8 .20649 .26678 .43700 .00893 .0051 .0085 .0132 .0034 .0007 .0035 |
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View JMOL 3-D Structure (permalink)
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