Table 4. Ion configurations with anomalous bond-length distribution when bonded to O2− .
Ion configuration | Electronic configuration | Anomalous shape? | Sample size (No. of coordination polyhedra) | Bond-length range (Å) | Δtopol > Δcryst? | Mechanism(s) |
---|---|---|---|---|---|---|
[6]Sc3+ | d 0 | Yes | 75 | 0.236 | Yes | BTE, PJTE |
[4]Ti4+ | d 0 | 4 | 0.159 | PJTE, BTE | ||
[5]Ti4+ | d 0 | Yes | 17 | 0.405 | PJTE, BTE | |
[6]Ti4+ | d 0 | Yes | 293 | 0.826 | PJTE, BTE | |
[7]Ti4+ | d 0 | Yes | 1 | 0.55 | No data | PJTE |
[6]V3+ | d 2 | Yes | 67 | 0.399 | Yes | BTE, JTEw |
[5]V4+ | d 1 | Yes | 95 | 0.577 | Yes | π, PJTE/BTE/CSE |
[6]V4+ | d 1 | Yes | 128 | 1.030 | Yes | π, PJTE/BTE |
[4]V5+ | d 0 | Yes | 355 | 0.391 | Yes | BTE, PJTE |
[5]V5+ | d 0 | Yes | 65 | 0.801 | Yes | π, PJTE, BTE |
[6]V5+ | d 0 | Yes | 293 | 0.993 | Yes | π, BTE/PJTE |
[5]Cr2+ | d 4 | 2 | 0.432 | PJTE, BTE | ||
[6]Cr2+ | d 4 | Yes | 9 | 0.696 | Yes | JTEs/BTE |
[6]Cr3+ | d 3 | Yes | 104 | 0.19 | Similar | BTE, CSE |
[4]Cr6+ | d 0 | Yes | 169 | 0.357 | Yes | BTE, PJTE, π |
[6]Mn3+ | d 4 | Yes | 82 | 0.755 | JTEs, BTE | |
[4]Fe3+ | d 5 | Yes | 65 | 0.201 | Yes | BTE |
[5]Co2+ | d 7 | 16 | 0.628 | PJTE | ||
[6]Co2+ | d 7 | 243 | 0.614 | Yes | BTE, JTEs | |
[5]Cu2+ | d 9 | 218 | 0.865 | PJTE, BTE | ||
[6]Cu2+ | d 9 | Yes | 365 | 0.893 | JTEs, BTE | |
[6]Zn2+ | d 10 | 193 | 0.868 | Similar | BTE/PJTE | |
[6]Y3+ | d 0 | Yes | 25 | 0.226 | Similar | PJTE/BTE |
[7]Y3+ | d 0 | Yes | 35 | 0.499 | PJTE | |
[8]Y3+ | d 0 | Yes | 99 | 0.507 | PJTE/BTE | |
[9]Y3+ | d 0 | 15 | 0.585 | PJTE, BTE | ||
[10]Y3+ | d 0 | 1 | 0.604 | Yes | BTE/PJTE | |
[6]Zr4+ | d 0 | Yes | 73 | 0.218 | PJTE, BTE | |
[4]Nb5+ | d 0 | 2 | 0.184 | No data | PJTE/BTE | |
[5]Nb5+ | d 0 | Yes | 4 | 0.164 | PJTE/BTE | |
[6]Nb5+ | d 0 | Yes | 240 | 0.742 | PJTE, BTE | |
[7]Nb5+ | d 0 | 3 | 0.668 | PJTE, BTE | ||
[6]Mo4+ | d 2 | Yes | 9 | 0.264 | Yes | BTE |
[5]Mo5+ | d 1 | Yes | 2 | 0.328 | No data | π |
[6]Mo5+ | d 1 | Yes | 74 | 0.806 | Yes | π, BTE, JTEw |
[4]Mo6+ | d 0 | Possibly | 434 | 0.268 | Yes | BTE, PJTE |
[5]Mo6+ | d 0 | 15 | 0.620 | Yes | π, BTE/PJTE | |
[6]Mo6+ | d 0 | Yes | 506 | 1.005 | PJTE, BTE | |
[6]Ru5+ | d 3 | Yes | 23 | 0.305 | CSE/BTE | |
[6]Cd2+ | d 10 | 135 | 0.591 | Yes | BTE, PJTE | |
[6]Hf4+ | d 0 | Possibly | 11 | 0.322 | PJTE, BTE | |
[6]Ta5+ | d 0 | Yes | 138 | 0.585 | PJTE, BTE | |
[7]Ta5+ | d 0 | Possibly | 14 | 0.619 | PJTE, BTE | |
[5]W6+ | d 0 | 12 | 0.467 | PJTE, BTE | ||
[6]W6+ | d 0 | Yes | 363 | 0.919 | PJTE, BTE | |
[4]Re7+ | d 0 | Yes | 41 | 0.150 | Yes | BTE, PJTE |
[5]Re7+ | d 0 | Possibly | 8 | 0.275 | PJTE | |
[6]Re7+ | d 0 | 10 | 0.195 | Yes | PJTE, BTE | |
[6]Os6+ | d 2 | Possibly | 1 | 0.266 | No data | BTE |
[5]Os8+ | d 0 | Possibly | 3 | 0.569 | PJTE, BTE | |
[6]Os8+ | d 0 | Yes | 4 | 0.442 | PJTE, BTE | |
[6]Hg2+ | d 10 | Yes | 25 | 0.912 | Similar | BTE/PJTE |