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Selected interatomic distances in Ba8Ti13−xMxAs21 (M = Nb, Ta).
| Atoms | Distance (Å) | ||
|---|---|---|---|
| Ba8Ti9.0(3)Nb4.0As21 | Ba8Ti9.24(6)Ta3.76As21 | ||
| Ba1 | —As1 × 3 | 3.319 (2) | 3.320 (1) |
| —As3 × 3 | 3.3506 (6) | 3.3515 (3) | |
| —As4 | 3.539 (1) | 3.5430 (9) | |
| —As2 × 3 | 3.621 (2) | 3.623 (1) | |
| Ti/M1 | —As3 | 2.467 (2) | 2.473 (1) |
| —As2 × 2 | 2.610 (1) | 2.6102 (9) | |
| —As1 × 2 | 2.619 (2) | 2.620 (1) | |
| —Ti/M1 × 4 | 3.078 (2) | 3.075 (1) | |
| —Ti/M2 | 3.078 (2) | 3.075 (1) | |
| Ti/M2 | —Ti/M1 × 12 | 3.078 (2) | 3.075 (1) |
| As1 | —As3 × 3 | 3.203 (2) | 3.2043 (8) |
