American Mineralogist Crystal Structure Database

1 matching records for this search.

Obertiite
 
Hawthorne F C, Cooper M A, Grice J D, Ottolini L
Download am/vol85/AM85_236.pdf
American Mineralogist 85 (2000) 236-241
A new anhydrous amphibole from the Eifel region, Germany:
Description and crystal structure of obertiite, NaNa2(Mg3FeTi)Si8O22O2
Note: M1A and M1 are interchanged in the bond length table
_database_code_amcsd 0002347
9.776 17.919 5.292 90 104.05 90 C2/m
atom     x      y     z  occ  Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
O1   .1136  .0858 .2176            .0062  .0047  .0091  .0000  .0007  .0005
O2   .1170  .1652 .7249            .0052  .0128  .0040  .0000  .0001 -.0007
O3   .1034      0 .7061            .0054  .0127  .0043      0  .0021      0
O4   .3578  .2508 .7995            .0115  .0068  .0111  .0012  .0005 -.0036
O5   .3497  .1276 .0805            .0069  .0130  .0075  .0049  .0030 -.0008
O6   .3461  .1200 .5798            .0084  .0105  .0066 -.0046  .0003 -.0001
O7   .3434      0 .2996            .0099  .0087  .0138      0  .0051      0
SiT1 .2836 .08524 .2941            .0058  .0055  .0050 -.0004  .0013  .0008
SiT2 .2883 .17078 .7985            .0051  .0063  .0040  .0003  .0001 -.0008
Ti1A     0  .0788    .5  .43       .0094  .0094  .0047      0  .0002      0
Mn1A     0  .0788    .5 .185       .0094  .0094  .0047      0  .0002      0
Mg1      0  .0910    .5 .385       .0094  .0094  .0047      0  .0002      0
Mg2      0 .18172     0  .66       .0077  .0084  .0069      0  .0024      0
Fe2      0 .18172     0 .325       .0077  .0084  .0069      0  .0024      0
Al2      0 .18172     0 .015       .0077  .0084  .0069      0  .0024      0
Mg3      0      0     0  .04       .0068  .0082  .0081      0  .0007      0
Na4      0  .2738    .5  .92       .0240  .0159  .0253      0  .0160      0
Fe4      0  .2738    .5  .03       .0240  .0159  .0253      0  .0160      0
Ca4      0  .2738    .5            .0240  .0159  .0253      0  .0160      0
KAm   .048     .5  .101  .09 .0200
NaAm  .048     .5  .101  .19 .0200
NaA2     0  .4886     0  .22 .0200
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