AM-2019-04471-A · Unidentified crystalline materialunverified
| designation | Unidentified crystalline material |
|---|---|
| chemical formula | Fe—S— |
| classification | Unclassified, sulfide-like |
| crystal system | Cubic |
| mohs hardness | — |
| density (g/cm³) | — |
| colour | Pale brass-yellow |
| type locality | — |
reported peaks (cm⁻¹): 343, 378, 430, 612
Submission accompanied by no provenance information. Macroscopic appearance and Raman response are consistent with pyrite but with an additional unaccounted band at 612 cm⁻¹. Repeat measurement after 14 months shows the feature persisting at the same wavenumber and the same relative intensity (±3%). Specimen has been thermally cycled to 77 K and back without loss of feature. The persistence is not predicted by any published model for the stated composition.
Note: composition string contains — in place of one or more element symbols. This is preserved as recorded by the submitter. Resubmission with corrected metadata is encouraged.
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. |
|---|---|---|---|
| 2019-08-04 14:04 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | R.E. |
| 2019-08-06 12:27 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | V.O. |
| 2019-08-19 11:56 UTC | pass B | Raman acquisition; 4 peaks above prominence threshold instrument: Horiba LabRAM HR (532 nm) ref. checked: RRUFF R05005 | V.O. |
| 2019-08-22 16:20 UTC | storage | re-bagged, label re-printed; placed in vault A, shelf 19, drawer 20 | R.E. |
| 2021-08-21 14:59 UTC | re-inspection | seal intact · label legible · no visible degradation | L.K. |
| 2023-08-21 15:22 UTC | re-inspection | seal intact · label legible · no visible degradation | L.K. |
| 2025-08-20 11:41 UTC | re-inspection | seal intact · label legible · no visible degradation | L.K. |
physical location: vault A · shelf 19 · drawer 20 · last documented inspection: 2025-08-20 11:41 UTC