| Sample | Bulk resistance, Rb (Ω) | Conductivity, s (Scm−1) |
| Pure | 7.00 × 106 | 2.73 × 10−8 |
| A | 7.94 × 104 | 1.60 × 10−6 |
| B | 7.00 × 103 | 1.82 × 10−5 |
| C | 2.00 × 104 | 7.96 × 10−6 |
| D | 1.60 × 105 | 7.96 × 10−7 |
| E | 2.70 × 105 | 4.72 × 10−7 |
| F | 1.86 × 106 | 8.56 × 10−8 |
| G | 1.90 × 106 | 5.03 × 10−8 |
| H | 2.33 × 106 | 4.10 × 10−8 |
| I | 7.00 × 106 | 2.27 × 10−8 |
| J | 1.14 × 107 | 1.68 × 10−8 |