AM-2017-10024-A · Sideritearchived
physical & structuralrev. 2
| designation | Siderite |
|---|---|
| chemical formula | FeCO₃ |
| classification | Carbonate / Calcite group |
| crystal system | Trigonal |
| mohs hardness | 3.5 – 4.5 |
| density (g/cm³) | 3.95 |
| colour | Slightly tarnished, pale yellow-brown |
| type locality | Anjanabonoina, Madagascar |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 185, 283, 733, 1087
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.