AM-2015-10019-A · Sideriteactive
withdrawal on file: metadata insufficient for re-verification after the 2014 reorganisation (recorded 2020-11-01; classification superseded; superseded by AM-2015-10004-A).
physical & structuralrev. 2
| designation | Siderite |
|---|---|
| chemical formula | FeCO₃ |
| classification | Carbonate / Calcite group |
| crystal system | Trigonal |
| mohs hardness | 3.5 – 4.5 |
| density (g/cm³) | 3.94 |
| colour | Honey brown |
| type locality | Weardale, County Durham, England |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 185, 730, 1087
notessubmitter remarks + registry
Standard siderite reference specimen. Supplied as a single piece on a small fragment of host matrix. Re-pass note (2026-06-14). Re-pass on 2026-06-14 reproduces previous measurements within experimental uncertainty; accompanying matrix re-described as a fine-grained shale fragment.
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. |
|---|---|---|---|
| 2015-06-20 12:58 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | H.D. |
| 2015-06-25 13:32 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | T.J. |
| 2015-06-30 11:38 UTC | pass B | Raman acquisition; 3 peaks above prominence threshold instrument: Horiba LabRAM HR (532 nm) ref. checked: AMCSD #9236 | T.J. |
| 2015-07-01 10:15 UTC | storage | re-bagged, label re-printed; placed in vault D, shelf 22, drawer 24 | H.D. |
| 2017-06-30 14:46 UTC | re-inspection | seal intact · label legible · no visible degradation | T.J. |
| 2019-06-30 12:45 UTC | re-inspection | seal intact · label legible · no visible degradation | T.J. |
| 2021-06-29 10:43 UTC | re-inspection | seal intact · label legible · no visible degradation | T.J. |
| 2023-06-29 10:47 UTC | re-inspection | seal intact · label legible · no visible degradation | T.J. |
physical location: vault D · shelf 22 · drawer 24 · last documented inspection: 2023-06-29 10:47 UTC