Sapphirine
Higgins J B, Ribbe P H
Contributions to Mineralogy and Petrology 68 (1979) 357-368
A neutron and x-ray diffraction study of (Mg-Al)VI and (Si-Al)IV ordering monoclinic sapphirine
Locality: Bekily, Madagasgar
Note: Data from neutron, known as sapphirine II
_database_code_amcsd 0012321
11.286 14.438 9.957 90 125.4 90 P2_1/a
atom      x      y     z occ Biso
Mg1   .0087  .1583 .1374 .04  .45
Mg2  -.0080  .1561 .6140 .06  .46
Mg3  -.0027  .0563 .3708 .56  .52
Mg4   .0010  .0572 .8719       .4
Mg5   .0084  .3664 .1430      .47
Mg6  -.0075  .3649 .6096      .63
Mg7  -.0002  .2571 .8752  .0  .68
Mg8   .2501  .2497 .8744 .12  .60
Al1   .0087  .1583 .1374 .96  .45
Al2  -.0080  .1561 .6140 .94  .46
Al3  -.0027  .0563 .3708 .44  .52
Al4   .0010  .0572 .8719  .0  .48
Al5   .0084  .3664 .1430  .0  .47
Al6  -.0075  .3649 .6096  .0  .63
Al7  -.0002  .2571 .8752      .68
Al8   .2501  .2497 .8744 .88  .60
Al1   .1990  .5551 .2457 .92  .59
Al2   .2030  .5530 .7556 .01  .86
Al3   .2012  .4494 .5070 .51  .63
Al4   .1977  .4410 .0044 .92  .40
Al5   .1872  .7551 .7548      .46
Al6   .1873  .2460 .5049 .73  .63
Si1   .1990  .5551 .2457 .08  .59
Si2   .2030  .5530 .7556 .99  .86
Si3   .2012  .4494 .5070 .49  .63
Si4   .1977  .4410 .0044 .08  .40
Si5   .1872  .7551 .7548  .0  .46
Si6   .1873  .2460 .5049 .27  .63
O1    .1215  .2548 .1199      .28
O2    .1287  .2514 .6330      .35
O3    .1196  .0580 .1267      .36
O4    .1124  .0568 .6191      .64
O5    .1138  .1570 .3651      .89
O6    .1052  .1675 .8468      .68
O7    .1107 -.0514 .3738      .84
O8    .1090 -.0576 .8682      .83
O9    .3729  .2490 .1142      .86
O10   .3777  .2455 .6288      .96
O11   .3586  .0402 .1254      .70
O12   .3661  .0419 .6269      .66
O13   .3870  .3439 .3864      .65
O14   .3932  .3333 .8999      .59
O15   .3647  .1486 .3525      .58
O16   .3740  .1550 .8762      .45
O17   .1390  .4564 .1240      .72
O18   .1444  .4626 .6304      .83
O19   .1339  .3495 .3975      .82
O20   .1247  .3446 .8711      .65