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central registry of unattributed material samples · est. 2007 · maintained by volunteers

overview›catalogue›AM-2011-10018-A

AM-2011-10018-A · Magnetitewithdrawn

This record has been withdrawn from active circulation. Historical metadata is retained for citation purposes only. Contact the registry before referencing this accession in new publications.
physical & structuralrev. 1
designationMagnetite
chemical formulaFe₃O₄
classificationOxide / Spinel group
crystal systemCubic
mohs hardness5.5 – 6.5
density (g/cm³)5.13
colourSlightly tarnished, steel grey, octahedral habit
type localityYaogangxian mine, Hunan, China
raman spectroscopy532 nm · pass A
200400600800100012001400Raman shift (cm⁻¹)intensity (arb.)304538667
λ_excitation: 532 nm · acq. 3 × 10 s · grating 1800 g/mmfig. 1 · raman.am-2011-10018-a.svg

reported peaks (cm⁻¹): 304, 538, 667

notessubmitter remarks + registry

Macroscopic appearance consistent with magnetite; no surface alteration observed at the time of intake.

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.

timestampstagedetailop.
2011-11-14 10:40 UTCintakeweighed, dimensioned, photographed; container sealed and labelled with the accession identifierN.P.
2011-11-17 09:38 UTCpass Avisual inspection · density (Archimedes) · mass to ±0.01 gN.P.
2011-12-02 10:43 UTCpass BRaman acquisition; 3 peaks above prominence threshold
instrument: Horiba LabRAM HR (532 nm)
ref. checked: ICDD card 04-9903
N.P.
2011-12-05 12:37 UTCstoragere-bagged, label re-printed; placed in vault B, shelf 02, drawer 18N.P.
2013-12-04 15:37 UTCre-inspectionseal intact · label legible · no visible degradationT.J.
2015-12-04 09:10 UTCre-inspectionseal intact · label legible · no visible degradationT.J.
2017-12-03 13:25 UTCre-inspectionseal intact · label legible · no visible degradationT.J.
2019-12-03 13:49 UTCre-inspectionseal intact · label legible · no visible degradationT.J.

physical location: vault B · shelf 02 · drawer 18 · last documented inspection: 2019-12-03 13:49 UTC