| U11 | U22 | U33 | U12 | U13 | U23 | |
| Si1 | 0.0084 (5) | 0.0084 (5) | 0.0084 (5) | −0.0005 (3) | −0.0005 (3) | −0.0005 (3) |
| N1 | 0.0076 (6) | 0.0076 (6) | 0.0076 (6) | 0.0012 (8) | 0.0012 (8) | −0.0012 (8) |
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