Quartz EDS spectrum, 20 keV e<sup>-</sup> beam, Torpy <i>et al.</i> 2020

Quartz EDS spectrum, 20 keV e^- beam, Torpy et al. 2020

Description	EDS spectrum of Quartz
Reference	Torpy et al. 2020 Torpy, A., Wilson, N., MacRae, C., Pownceby, M., Biswas, P., Rahman, M., & Zaman, M. (2020). Deciphering the Complex Mineralogy of River Sand Deposits through Clustering and Quantification of Hyperspectral X-Ray Maps. Microscopy and Microanalysis, 26(4), 768-792 https://doi.org/10.1017/S143192762000135X
Date measured	2018-05-01
Material	Quartz [ SiO₂ ] Rutilated quartz specimen, from Ibitiara, Bahia, Northeast Region, Brazil. Size: 6.6 x 5.5 x 5.1 cm. © Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
Specimen	Tista 2020 D4 Shaker [CSIRO], Teesta River, Bangladesh Clustered phase map of river sands (D4 shaker), from the Tista River, Bangladesh. From Torpy et al. 2020 © (C) 2020 CSIRO Mineral Resources
Technique	Energy dispersive x-ray spectrometry (EDS)
Instrument	JEOL 8500F
Probe	20 keV electron beam
Beam current	69.64 nA
Probe diameter	2 μm
Detector name	2× Bruker XFLASH
Det. technology	Silicon drift detector (SDD)
Real time	6925.51 s
Live time	4101.49 s
Dead time	40.7771 %
Channel count	4096
Energy range	-477.548 … 19984.5 eV
Gain	4.99684 eV/channel
Intensity range	5.6946×10⁷ counts
Integral	1.5785×10⁹ counts
Related measurement	Quartz CL spectrum, 20 keV e^- beam, Torpy et al. 2020 (co-measured)

Composition from this measurement.
Element	Atoms	At%	Wt%
Ti	0.0002382	0.007898	0.019
Fe	0.00258	0.0855	0.24
Al	0.00267	0.0885	0.12
Si	1	33.2	46.8
O	2.01	66.7	53.6