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Ludwigite |
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Irwin M B, Peterson R C |
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The Canadian Mineralogist 37 (1999) 939-943 |
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The crystal structure of ludwigite |
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Locality: Crestmore quarry, California, USA |
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_database_code_amcsd 0005628 |
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9.2411 12.2948 3.0213 90 90 90 Pbam |
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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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Mg1 0 0 0 .99 .0057 .0053 .0054 .0065 -.0008 0 0 |
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Fe1 0 0 0 .01 .0057 .0053 .0054 .0065 -.0008 0 0 |
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Mg2 .5 0 .5 .443 .0070 .0095 .0043 .0065 -.0004 0 0 |
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Fe2 .5 0 .5 .557 .0070 .0095 .0043 .0065 -.0004 0 0 |
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Mg3 .0023 .2798 0 .99 .0052 .0057 .0040 .0058 .0005 0 0 |
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Fe3 .0023 .2798 0 .01 .0052 .0057 .0040 .0058 .0005 0 0 |
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Al4 .2399 .1145 .5 .08 .0049 .0048 .0050 .0049 -.0010 0 0 |
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Fe4 .2399 .1145 .5 .92 .0049 .0048 .0050 .0049 -.0010 0 0 |
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B .2743 .3600 .5 .0056 .0062 .0049 .0057 .0006 0 0 |
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O1 .8502 .0434 .5 .0069 .0063 .0054 .0090 -.0007 0 0 |
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O2 .3841 .0772 0 .0072 .0067 .0057 .0095 .0006 0 0 |
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O3 .6253 .1424 .5 .0072 .0060 .0064 .0091 .0003 0 0 |
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O4 .1092 .1424 0 .0064 .0063 .0053 .0077 .0001 0 0 |
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O5 .8508 .2373 .5 .0075 .0081 .0048 .0088 .0004 0 0 |
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Ludwigite |
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Brovkin A A, Rozhdestvenskaya I V, Rykova E A |
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Crystallography Reports 47 (2002) 412-414 |
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Cation distribution in the structure of titanium-containing ludwigite |
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Note: to be the mineral azoproite, Ti+Mg must be greater than Fe3+ in M4 site |
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Note: Uiso values have been divided by 100 |
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Locality: Tazheran massif |
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_database_code_amcsd 0018467 |
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9.260 12.294 3.0236 90 90 90 Pbam |
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atom x y z occ Uiso |
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MgM1 0 0 .5 .0062 |
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MgM2 .0012 .28057 .5 .0057 |
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Fe2+M3 .5 0 0 .324 .0041 |
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MgM3 .5 0 0 .676 .0041 |
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Fe3+M4 .23823 .11540 0 .47 .00676 |
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Ti4+M4 .23823 .11540 0 .21 .00676 |
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MgM4 .23823 .11540 0 .15 .00676 |
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AlM4 .23823 .11540 0 .10 .00676 |
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Fe2+M4 .23823 .11540 0 .07 .00676 |
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B .2746 .3602 0 .0059 |
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O1 .3499 .4571 0 .0065 |
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O2 .1095 .1429 .5 .0084 |
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O3 .1244 .3581 0 .0072 |
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O4 .3838 .0762 .5 .0095 |
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O5 .3497 .2624 0 .0069 |
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| Download AMC data (View Text File)
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Ludwigite |
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Holtstam D |
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Neues Jahrbuch fur Mineralogie, Monatshefte 2001 (2001) 520-528 |
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Crystal chemistry of a manganian ludwigite |
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Note: z-coordinate has been altered through personal communication with the author |
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Locality: Jakobsberg Fe-Mn oxide deposit, Filipstad, Varmland, Sweden |
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_database_code_amcsd 0014914 |
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9.240 12.362 2.9869 90 90 90 Pbam |
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atom x y z occ Uiso |
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Mgl .5 .5 .5 .0050 |
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Mg2 .5 0 0 .91 .0072 |
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Fe2 .5 0 0 .09 .0072 |
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Mg3 .0023 .2809 .5 .0065 |
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Fe4 -.2609 .3840 0 .51 .0062 |
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Mn4 -.2609 .3840 0 .27 .0062 |
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Al4 -.2609 .3840 0 .22 .0062 |
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B .2739 .3602 0 .0055 |
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O1 .3504 .4566 0 .0083 |
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O2 -.1193 .4234 .5 .0087 |
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O3 .1254 .3587 0 .0070 |
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O4 .1114 .1444 .5 .0063 |
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O5 .3517 .2625 0 .0070 |
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| Download AMC data (View Text File)
Download CIF data (View Text File)
Download diffraction data (View Text File)
View JMOL 3-D Structure
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