Lonsdaleite CL spectrum, 7 keV e- beam, LN2 (77K), Tomkins et al. 2022
Measurement spectrum
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Measurement details
| Description | CL spectrum of Lonsdaleite |
| Reference | Tomkins et al. 2022 Tomkins, A., Wilson, N., MacRae, C., Salek, A.; Field, M., Brand, H., Langendam, A., Stephen, N., Torpy, A., Pintér, Z., Jennings, L., and McCulloch, D. Sequential Lonsdaleite to Diamond Formation in Ureilite Meteorites via In Situ Chemical Fluid/Vapor Deposition, PNAS, 2022(119) https://doi.org/10.1073/pnas.2208814119 |
| Date measured | 2022-02-24 |
| Material | Lonsdaleite [ C ] |
| Specimen temperature | LN2 (77K) |
| Analysis technique | Cathodoluminescence (CL) |
| Instrument | JEOL 8530F |
| Probe | 7 keV electron beam |
| Beam current | 80.6 nA |
| Probe diameter | 0.4 μm |
| Detector name | OceanOptics QEPRO |
| Det. technology | CCD, Si, Peltier cooled |
| Acquisition time | 3993.09 s |
| Channel count | 1024 |
| Wavelength range | 199.467 … 970.586 nm |
| Intensity range | 1086 … 4.840×106 counts |
| Integral | 9.3134×108 counts |
Specimen details
| Name | NWA 7983 |
| Owner | Monash University |
| Locality | Morocco |
| Other measurements | CL
SXES |
Specimen image
Cathodoluminescence overlay on EPMA chemical phase map of lonsdaleite and diamond in NWA7983 ureilite (Tomkins et al. 2022)
Measurement image
Two CL spectra of Lonsdaleite, compared to Diamond
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