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Povondraite |
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Grice J D, Ercit T S, Hawthorne F C |
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American Mineralogist 78 (1993) 433-436 |
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Povondraite, a redefinition of the tourmaline ferridravite |
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Note: Atomic parameters updated by Grice on 11/20/2001. |
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16.186 16.186 7.444 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 .2277 .0171 .0171 .0340 .00855 0 0 |
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FeY .1224 .0612 .6429 .0044 .0036 .0118 .0022 -.0009 -.0005 |
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FeZ .2987 .2627 .6124 .0041 .0041 .0091 .0021 .0005 .0009 |
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B .1097 .2194 .4558 .0118 .0046 .0078 .0023 .0003 .0006 |
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Si .1892 .1876 0 .0056 .0043 .0097 .0028 -.0010 -.0010 |
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O1 0 0 .7718 .0077 .0077 .0077 .00385 0 0 |
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O2 .0610 .1220 .4905 .0101 .0041 .0130 .0020 .0009 .0018 |
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O3 .2578 .1289 .5123 .0122 .0077 .0088 .0061 -.0026 -.0013 |
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O4 .0924 .1848 .0692 .0082 .0156 .0126 .0078 -.0058 -.0029 |
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O5 .1826 .0913 .0866 .0102 .0040 .0183 .0051 .0005 .0002 |
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O6 .1922 .1829 .7838 .0114 .0069 .0083 .0057 -.0004 -.0016 |
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O7 .2811 .2813 .0754 .0086 .0068 .0119 .0020 -.0002 -.0009 |
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O8 .2070 .2679 .4420 .0053 .0097 .0175 .0045 .0038 .0055 |
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H3 .2411 .1205 .4027 .666 0.02 |
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