Appendix 3. Bond valences (v.u.) for högbomite-24R. According to electron-microprobe analyses Fe is present in approximately equal amounts of ferrous and ferric iron, which has been considered in bond valence calculations.
M1 (Al) |
M2 (Ti/Fe/Mg) |
T3 (Mg/Fe) |
M4 (Al) |
M5 (Al) |
T6 (Mg/Fe) |
T7 (Mg/Fe) |
M8 (Al) |
S |
||
O1 |
4 |
0.443 |
0.372 |
0.675 |
1.933 |
|||||
4´ ¯ 2´ ® |
3´ ¯ 1´ ® |
3´ ¯ 1´ ® |
||||||||
O2 |
3 |
0.467 |
1.401 |
|||||||
2´ ¯ 3´ ® |
||||||||||
O3 |
3 |
0.800 |
0.483 |
1.766 |
||||||
3´ ¯ 1´ ® |
2´ ¯ 2´ ® |
|||||||||
O4 |
4 |
0.677 |
0.464 |
2.069 |
||||||
1´ ¯ 1´ ® |
1´ ¯ 3´ ® |
|||||||||
O5 |
4 |
0.421 |
0.512 |
0.580 |
2.025 |
|||||
2´ ¯ 1´ ® |
3´ ¯ 2´ ® |
3´ ¯ 1´ ® |
||||||||
O6 |
4 |
0.502 |
0.507 |
2.013 |
||||||
1´ ¯ 3´ ® |
1´ ¯ 1´ ® |
|||||||||
O7 |
4 |
0.485 |
0.503 |
0.505 |
1.998 |
|||||
3´ ¯ 1´ ® |
3´ ¯ 1´ ® |
4´ ¯ 2´ ® |
||||||||
O8 |
4 |
0.528 |
0.444 |
1.860 |
||||||
1´ ¯ 1´ ® |
2´ ¯ 3´ ® |
|||||||||
S |
2.706 |
3.516 |
2.702 |
2.774 |
2.991 |
2.016 |
2.268 |
2.908 |
Appendix 4. Bond valences (v.u.) for högbomite-10T. According to electron-microprobe analyses Fe is present in approximately equal amounts of ferrous and ferric iron, which has been considered in bond valence calculations.
M1 (Al) |
T2 (Fe/Mg) |
M3 (Al) |
T4 (Fe/Mg) |
M5 (Ti/Fe/Mg) |
M6 (Al) |
T7 (Fe/Mg) |
M8 (Al) |
T9 (Zn/Mg) |
M10 (Al) |
S |
||
O1 |
4 |
0.490 |
0.575 |
0.478 |
2.021 |
|||||||
6´ ¯ 1´ ® |
3´ ¯ 1´ ® |
2´ ¯ 2´ ® |
||||||||||
O2 |
4 |
0.575 |
0.516 |
2.123 |
||||||||
1´ ¯ 1´ ® |
1´ ¯ 3´ ® |
|||||||||||
O3 |
4 |
0.477 |
0.719 |
0.340 |
2.013 |
|||||||
2´ ¯ 2´ ® |
3´ ¯ 1´ ® |
3´ ¯ 1´ ® |
||||||||||
O4 |
3 |
0.453 |
1.359 |
|||||||||
1´ ¯ 3´ ® |
||||||||||||
O5 |
3 |
0.745 |
0.516 |
1.777 |
||||||||
3´ ¯ 1´ ® |
2´ ¯ 2´ ® |
|||||||||||
O6 |
4 |
0.730 |
0.460 |
2.110 |
||||||||
1´ ¯ 1´ ® |
1´ ¯ 3´ ® |
|||||||||||
O7 |
4 |
0.434 |
0.583 |
0.528 |
1.979 |
|||||||
2´ ¯ 2´ ® |
3´ ¯ 1´ ® |
3´ ¯ 1´ ® |
||||||||||
O8 |
4 |
0.507 |
0.508 |
2.029 |
||||||||
1´ ¯ 3´ ® |
1´ ¯ 1´ ® |
|||||||||||
O9 |
4 |
0.494 |
0.500 |
0.507 |
2.008 |
|||||||
3´ ¯ 1´ ® |
3´ ¯ 1´ ® |
4´ ¯ 2´ ® |
||||||||||
O10 |
4 |
0.531 |
0.459 |
1.908 |
||||||||
1´ ¯ 1´ ® |
2´ ¯ 3´ ® |
|||||||||||
S |
2.940 |
2.300 |
2.879 |
2.887 |
3.255 |
2.867 |
2.280 |
3.066 |
2.008 |
2.946 |