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

overview›catalogue›AM-2012-10003-A

AM-2012-10003-A · Quartzunverified

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. 1
designationQuartz
chemical formulaSiO₂
classificationTectosilicate / Quartz group
crystal systemTrigonal
mohs hardness7
density (g/cm³)2.66
colourColourless, transparent
type localityTouissit, Oriental, Morocco
raman spectroscopy532 nm · pass A
200400600800100012001400Raman shift (cm⁻¹)intensity (arb.)12635569680810831162
λ_excitation: 532 nm · acq. 3 × 10 s · grating 1800 g/mmfig. 1 · raman.am-2012-10003-a.svg

reported peaks (cm⁻¹): 126, 355, 696, 808, 1083, 1162

notessubmitter remarks + registry

Specimen accompanied by a single typewritten card listing the locality and the year of collection. Original collection number illegible due to ink fade.

chain of custody8 events · 6 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.
2012-03-06 10:23 UTCintakeweighed, dimensioned, photographed; container sealed and labelled with the accession identifierR.E.
2012-03-07 13:04 UTCpass Avisual inspection · density (Archimedes) · mass to ±0.01 gC.B.
2012-03-11 12:42 UTCpass BRaman acquisition; 6 peaks above prominence threshold
instrument: Horiba LabRAM HR (532 nm)
ref. checked: AMCSD #4261
C.B.
2012-03-14 10:47 UTCstoragere-bagged, label re-printed; placed in vault D, shelf 05, drawer 20R.E.
2014-03-14 13:27 UTCre-inspectionseal intact · label legible · no visible degradationM.A.
2016-03-13 10:52 UTCre-inspectionseal intact · label legible · no visible degradationM.A.
2018-03-13 16:14 UTCre-inspectionseal intact · label legible · no visible degradationM.A.
2020-03-12 10:25 UTCre-inspectionseal intact · label legible · no visible degradationM.A.

physical location: vault D · shelf 05 · drawer 20 · last documented inspection: 2020-03-12 10:25 UTC