Ludwigite
Irwin M B, Peterson R C
The Canadian Mineralogist 37 (1999) 939-943
The crystal structure of ludwigite
Locality: Crestmore quarry, California, USA
_database_code_amcsd 0005628
9.2411 12.2948 3.0213 90 90 90 Pbam
atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Mg1 0 0 0 .99 .0057 .0053 .0054 .0065 -.0008 0 0
Fe1 0 0 0 .01 .0057 .0053 .0054 .0065 -.0008 0 0
Mg2 .5 0 .5 .443 .0070 .0095 .0043 .0065 -.0004 0 0
Fe2 .5 0 .5 .557 .0070 .0095 .0043 .0065 -.0004 0 0
Mg3 .0023 .2798 0 .99 .0052 .0057 .0040 .0058 .0005 0 0
Fe3 .0023 .2798 0 .01 .0052 .0057 .0040 .0058 .0005 0 0
Al4 .2399 .1145 .5 .08 .0049 .0048 .0050 .0049 -.0010 0 0
Fe4 .2399 .1145 .5 .92 .0049 .0048 .0050 .0049 -.0010 0 0
B .2743 .3600 .5 .0056 .0062 .0049 .0057 .0006 0 0
O1 .8502 .0434 .5 .0069 .0063 .0054 .0090 -.0007 0 0
O2 .3841 .0772 0 .0072 .0067 .0057 .0095 .0006 0 0
O3 .6253 .1424 .5 .0072 .0060 .0064 .0091 .0003 0 0
O4 .1092 .1424 0 .0064 .0063 .0053 .0077 .0001 0 0
O5 .8508 .2373 .5 .0075 .0081 .0048 .0088 .0004 0 0
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Ludwigite
Biryukov Y P, Zinnatullin A L, Levashova I O, Shablinskii A P, Bubnova R S,
Vagizov F G, Ugolkov V L, Filatov S K, Pekov I V
Acta Crystallographica B79 (2023) S2052520623006455
Crystal structure refinement, low- and high-temperature X-ray diffraction
and Mossbauer spectroscopy study of the oxoborate ludwigite from the Iten'yurginskoe deposit
Locality: Iten'yurginskoe, Eastern Chukotka, Russia
_database_code_amcsd 0021228
9.2532 12.3025 3.0256 90 90 90 Pbam
atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Mg1 0 0 0 .0077 .010 .008 .005 -.001 0 0
Mg2 .5 0 .5 .477 .0089 .0134 .0055 .0077 -.0005 0 0
Fe2 .5 0 .5 .523 .0089 .0134 .0055 .0077 -.0005 0 0
Mg3 .0021 .2796 0 .978 .0101 .012 .0090 .0094 .0011 0 0
Fe3 .0021 .2796 0 .022 .0101 .012 .0090 .0094 .0011 0 0
Fe4 .73942 .38552 .5 .90 .0065 .0051 .0075 .0071 .0021 0 0
Mg4 .73942 .38552 .5 .02 .0065 .0051 .0075 .0071 .0021 0 0
Al4 .73942 .38552 .5 .08 .0065 .0051 .0075 .0071 .0021 0 0
B .2733 .3588 .5 .010 .024 .006 .001 -.004 0 0
O1 .8499 .0442 .5 .010 .006 .012 .012 .002 0 0
O2 .3843 .0769 0 .012 .014 .007 .016 .003 0 0
O3 .6253 .1418 .5 .011 .008 .015 .010 -.004 0 0
O4 .1104 .1419 0 .011 .016 .007 .009 .000 0 0
O5 .3498 .2624 .5 .008 .011 .009 .006 -.003 0 0
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Ludwigite
Brovkin A A, Rozhdestvenskaya I V, Rykova E A
Crystallography Reports 47 (2002) 412-414
Cation distribution in the structure of titanium-containing ludwigite
Note: to be the mineral azoproite, Ti+Mg must be greater than Fe3+ in M4 site
Note: Uiso values have been divided by 100
Locality: Tazheran massif
_database_code_amcsd 0018467
9.260 12.294 3.0236 90 90 90 Pbam
atom x y z occ Uiso
MgM1 0 0 .5 .0062
MgM2 .0012 .28057 .5 .0057
Fe2+M3 .5 0 0 .324 .0041
MgM3 .5 0 0 .676 .0041
Fe3+M4 .23823 .11540 0 .47 .00676
Ti4+M4 .23823 .11540 0 .21 .00676
MgM4 .23823 .11540 0 .15 .00676
AlM4 .23823 .11540 0 .10 .00676
Fe2+M4 .23823 .11540 0 .07 .00676
B .2746 .3602 0 .0059
O1 .3499 .4571 0 .0065
O2 .1095 .1429 .5 .0084
O3 .1244 .3581 0 .0072
O4 .3838 .0762 .5 .0095
O5 .3497 .2624 0 .0069
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Ludwigite
Holtstam D
Neues Jahrbuch fur Mineralogie, Monatshefte 2001 (2001) 520-528
Crystal chemistry of a manganian ludwigite
Note: z-coordinate has been altered through personal communication with the author
Locality: Jakobsberg Fe-Mn oxide deposit, Filipstad, Varmland, Sweden
_database_code_amcsd 0014914
9.240 12.362 2.9869 90 90 90 Pbam
atom x y z occ Uiso
Mgl .5 .5 .5 .0050
Mg2 .5 0 0 .91 .0072
Fe2 .5 0 0 .09 .0072
Mg3 .0023 .2809 .5 .0065
Fe4 -.2609 .3840 0 .51 .0062
Mn4 -.2609 .3840 0 .27 .0062
Al4 -.2609 .3840 0 .22 .0062
B .2739 .3602 0 .0055
O1 .3504 .4566 0 .0083
O2 -.1193 .4234 .5 .0087
O3 .1254 .3587 0 .0070
O4 .1114 .1444 .5 .0063
O5 .3517 .2625 0 .0070
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