Spodumene

Spectrum Details

Modality

NIR

Category

mineral

Material Type

Inosilicate

Sample ID

HS210.1B, HS210.2B, HS210.3B, HS210.4B

Collection Locality

Afghanistan

Spectral Purity

1c2_3_4_ # HS210.1B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1c2_3_4_ # HS210.2B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1c2c3c4_ # HS210.3B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1c2_3_4_ # HS210.4B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns

Composition / XRD

None # XRF, EPMA, ICP(Trace), WChem COMPOSITION_TRACE:

Sample Description

"I-7 Spodumene 210B-Afganistan. LiAlSi2O6: Spodumene is a characteristic mineral of lithium-rich granite pegmatites. It usually does not have a wide range of composition, but this sample contains enough ferrous iron to provide the broad weak band near 1.0µ and the fall off to the blue in the visible. In addition, water bands at 1.4µ and 1.9µ are evident, and the quite sharp feature near 2.2µ is a combination band of the OH stretching mode. These bands are due to a surprising small amount of clay mineral deposited in microfractures in the spodumene." Hunt, G.R., J.W. Salisbury, and C.J. Lenhoff, 1973, Visible and near-infrared spectra of minerals and rocks: VI. Additional silicates. Modern Geology, v. 4, p. 85-106. Grain size fractions are indicated by the extension after the sample number: .1B = IMAGE_OF_SAMPLE:

XRD Analysis

Spodumene + quartz + trace muscovite (Norma Vergo).

X Units

cm⁻¹

Y Units

Absorbance

Data Points

2,126