AM-2017-10013-A · Rutileunverified
The classification below is preliminary. Spectroscopic confirmation is incomplete; values shown reflect the most recent analytical pass and may be revised without notice.
physical & structuralrev. 2
| designation | Rutile |
|---|---|
| chemical formula | TiO₂ |
| classification | Oxide / Rutile group |
| crystal system | Tetragonal |
| mohs hardness | 6 – 6.5 |
| density (g/cm³) | 4.21 |
| colour | Weakly zoned, black, prismatic crystals |
| type locality | Toroku mine, Miyazaki, Japan |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 145, 236, 446, 613
notessubmitter remarks + registry
Macroscopic appearance consistent with rutile; no surface alteration observed at the time of intake. Re-pass note (2026-06-07). Re-pass on 2026-06-07 reproduces previous visual characterisation within experimental uncertainty; status retained as UNVERIFIED pending instrumental confirmation.
chain of custody8 events · 5 seal-breaks
Events recorded against this accession in the registry's printed custody book. Operator initials are anonymous. Storage codes follow the convention vault-shelf-drawer.
| timestamp | stage | detail | op. |
|---|---|---|---|
| 2017-08-28 11:55 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | T.J. |
| 2017-09-01 13:30 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | R.E. |
| 2017-09-16 12:00 UTC | pass B | Raman acquisition; 4 peaks above prominence threshold instrument: Horiba LabRAM HR (532 nm) ref. checked: RRUFF R05001 | R.E. |
| 2017-09-17 15:26 UTC | storage | re-bagged, label re-printed; placed in vault A, shelf 13, drawer 11 | T.J. |
| 2019-09-17 12:37 UTC | re-inspection | seal intact · label legible · no visible degradation | S.W. |
| 2021-09-16 14:35 UTC | re-inspection | seal intact · label legible · no visible degradation | S.W. |
| 2023-09-16 13:42 UTC | re-inspection | seal intact · label legible · no visible degradation | S.W. |
| 2025-09-15 14:19 UTC | re-inspection | seal intact · label legible · no visible degradation | S.W. |
physical location: vault A · shelf 13 · drawer 11 · last documented inspection: 2025-09-15 14:19 UTC