Holmquistite reflectance spectrum, IR illum., CSIRO 2025

Description	Reflectance spectrum of Holmquistite in C3-300, from CSIRO Reflectance (2025). From original file 'Holmquistite_C3-300_Batch_3_a_.0.dpt'.
Reference	Reflectance spectra measured by Carsten Laukamp and colleagues
Material	Holmquistite [ ☐Li₂(Mg₃Al₂)Si₈O₂₂(OH)₂ ]
Analysis technique	Reflectance
Instrument	Bruker Vertex 80v FTIR spectrometer
Illumination	IR light source
Channel count	3667
Wavelength range	2004 … 16664 nm
Intensity range	0.241 absolute reflectance
Download	Holmquistite_C3-300_Batch_3_a_.0.txt [80.1 kB]

Name	C3-300 Magnesio-hornblende / Holmquistite
Owner	CSIRO - ARRC Collection
Phase abundance (QXRD)	Magnesio-hornblende (var. Fe2+): 63% Holmquistite: 25% Quartz: 6% Titanite: 6%
Other measurements	Holmquistite, Magnesio-hornblende, Quartz and Titanite XRD quant/phase, x-ray beam, Owen et al. 2023 (Jobs # 6243, 6245)

Image of Holmquistite, Magnesio-hornblende (var. Fe2+), Quartz and Titanite in specimen 'C3-300 Magnesio-hornblende / Holmquistite' [CSIRO].

Nominal composition of Holmquistite [ ☐Li₂(Mg₃Al₂)Si₈O₂₂(OH)₂ ].
Element	Atoms	At%	Wt%
☐	1	?	?
H	2	4.88	0.268
Li	2	4.88	1.85
Mg	3	7.32	9.7
Al	2	4.88	7.18
Si	8	19.5	29.9
O	24	58.5	51.1
Total	41	100	100