Epidote reflectance spectrum, 20±2°C, Pejcic <i>et al.</i> 2022 (EP2022-5804)

Epidote reflectance spectrum, 20±2°C, Pejcic et al. 2022 (EP2022-5804)

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Measurement details

Description	VNIR-SWIR reflectance spectrum of Epidote [Ca2(Al2Fe3+)[Si2O7][SiO4]O(OH)] in specimen 'MCU_EPI_1' (CSIRO - ARRC).
Reference	Pejcic et al. 2022 (EP2022-5804) Pejcic, Bobby; Shelton, Tina; Laukamp, Carsten; Lau, Ian; leGras, Monica. Visible-Near Infrared Spectral Library. Perth: CSIRO; 2022. csiro:EP2022-5804. https://doi.org/10.25919/whwy-ma94
Material	Epidote [ Ca₂(Al₂Fe^III)[Si₂O₇][SiO₄]O(OH) ]
Specimen temperature	20±2°C
Analysis technique	Reflectance
Instrument	ASD FieldSpec3 spectrometer (model A122300)
Det. technology	512 element Si photodiode array (350-1000nm) + InGaAs photodiodes (1000-2500nm)
Acquisition time	3 s
Channel count	2151
Wavelength range	350 … 2499 nm
Intensity range	0.0456 … 0.377 absolute reflectance
Related measurement	Epidote reflectance spectrum, 20±2°C, Pejcic et al. 2021 (EP2021-1148)
Download	Epidote_Reflectance_2.txt [45.4 kB]

Specimen details

Name	MCU_EPI_1 Epidote
Owner	CSIRO - ARRC Collection
Phase abundance (QXRD)	Epidote: 81.3% Quartz: 9.3% Albite: 5.4% Clinochlore (var. Fe): 2.2% Magnetite: 1.6% Muscovite-1M: 0.3%
Other measurements	Reflectance Epidote reflectance spectrum, 20±2°C, Pejcic et al. 2021 (EP2021-1148) XRD Albite, Clinochlore, Epidote, Magnetite, Muscovite-1M and Quartz XRD quant/phase, x-ray beam, Owen et al. 2023 (Jobs # 6243, 6245)

Specimen image

Image of Epidote, Albite, Clinochlore (var. Fe), Magnetite and Quartz in specimen 'MCU_EPI_1 Epidote' [CSIRO].

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Composition

Nominal composition of Epidote [ Ca₂(Al₂Fe^III)[Si₂O₇][SiO₄]O(OH) ].
Element	Atoms	At%	Wt%
H	1	4.55	0.209
Ca	2	9.09	16.6
Fe	1	4.55	11.6
Al	2	9.09	11.2
Si	3	13.6	17.4
O	13	59.1	43
Total	22	100	100