Vermiculite VTx-1.fls

Spectrum Details

Modality

NIR

Category

mineral

Material Type

Phyllosilicate

Sample ID

VTx-1.fls

Collection Locality

Llano, Texas

Spectral Purity

1b2_3_4_ # VTx-1.fls # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns

Composition / XRD

XRF # XRF, EPMA, ICP(Trace), WChem

Sample Description

Whole flakes of mica were hand selected for this measurement from a matrix of finer material that may also magnesite. This should allow for a clean spectrum of the vermiculite. G. Swayze. IMAGE_OF_SAMPLE:

XRD Analysis

Not vermiculite - not pure (Norma Vergo). Spectrally pure, but not chemically pure. (Norma Vergo). This is a vermiculite that is Mg and Al rich with a strong MgAl[ ]OH vacancy absorption at 2.24 microns that is usually much weaker or absent in other vermiculite samples. There is no spectral evidence for magnesite contamination. G. Swayze.

X Units

cm⁻¹

Y Units

Absorbance

Data Points

2,126