AM-2019-04471-A · Unidentified crystalline materialunverified
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. 5
| 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 | — |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 343, 378, 430, 612
notessubmitter remarks + registry
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.