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

Measurement spectrum

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Measurement details

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Reference Otherwise unpublished work by CSIRO & WUStL, Apollo 12, AMAS XV.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 temperature Ambient
Analysis 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%)

Specimen image

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


Composition

Nominal composition of Alkali feldspar (var.lunar) [ (Na,K)AlSi3O8 ].
Element Atoms
Na 1-x
K x
Al 1
Si 3
O 8