AM-2017-03404-C · Scheelite, metastable spectral statearchived
physical & structuralrev. 6
| designation | Scheelite, metastable spectral state |
|---|---|
| chemical formula | CaWO₄ |
| classification | Tungstate |
| crystal system | Tetragonal |
| mohs hardness | 4.5 – 5 |
| density (g/cm³) | 5.95 |
| colour | Pale yellow, strongly fluorescent |
| type locality | Yaogangxian mine, Hunan, China |
raman spectroscopy532 nm · pass C
reported peaks (cm⁻¹): 336, 412, 797, 911
notessubmitter remarks + registry
Raman peaks at 911 cm⁻¹ show coherent drift of approximately ±0.4 cm⁻¹ over a six-hour acquisition window, well outside thermal expansion bounds for the cited environmental log. Drift is reversible on darkening of the specimen and reproduces across illumination cycles. Photoluminescence decay deviates from a single-exponential model. The specimen is otherwise indistinguishable from reference scheelite within current measurement precision.