Alkali feldspar (var. lunar) CL spectrum, 15 keV e<sup>-</sup> beam, CSIRO/WUStL Apollo 12 (2019)

Alkali feldspar (var. lunar) CL spectrum, 15 keV e^- beam, CSIRO/WUStL Apollo 12 (2019)

Description	CL spectrum of Alkali feldspar (var. lunar), from Apollo 12 mission
Reference	Otherwise unpublished work by CSIRO & WUStL, Apollo 12, AMAS XV. Feb 2019 https://research.csiro.au/microbeam-lab/
Date measured	2019-02-21
Material	Alkali feldspar (var. lunar) [ (Na, K)AlSi₃O₈ ]
Specimen	Apollo 12032-366-19x [NASA], Bench Crater, Ocean of Storms, 3.01239°S 23.42157°W, The Moon Clustered phase map of Apollo 12032-366-19x specimen, from Ocean of Storms, 3.01239°S 23.42157°W, The Moon © (C) 2019 CSIRO Mineral Resources
Specimen URL	https://curator.jsc.nasa.gov/lunar/lsc/12032.pdf
Specimen temperature	Ambient
Technique	Cathodoluminescence (CL)
Instrument	JEOL 8500F
Probe	15 keV electron beam
Beam current	39.68 nA
Probe diameter	1 μm
Acquisition time	43363.4 s
Channel count	1024
Wavelength range	199.467 … 970.586 nm
Intensity range	100 (normalised intensity)
Line	Unspecified 2.632 eV (100%)

Nominal composition of Alkali feldspar (var.lunar) [ (Na,K)AlSi₃O₈ ].
Element	Atoms	At%	Wt%
K	1	5.33772	9.78333
Na	0.361868	1.93155	2.08168
Ba	0.0425507	0.227124	1.46215
Ca	0.034582	0.18459	0.3468
Fe	0.0067197	0.035868	0.0939
Al	1.4844	7.9233	10.0218
Si	4.23764	22.6193	29.7807
O	11.567	61.741	46.307