Lonsdaleite CL spectrum, 7 keV e- beam, LN2 (77K), Tomkins et al. 2022
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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
(C) 2023 CSIRO Mineral Resources