Stilbite GDS8 Zeolite

Spectrum Details

Modality

NIR

Category

mineral

Material Type

Tectosilicate

Sample ID

GDS8

Collection Locality

Nasik, India

Spectral Purity

1b2b3b4_ # GDS8 # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns

Composition / XRD

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

Sample Description

The sample appears white and to be spectrally pure. IMAGE_OF_SAMPLE:

XRD Analysis

Primarily a zeolite of the heulandite group - best match is stellerite, but this isn't definitive. Konnert, Judith and Marta Flohr, 1992, unpublished data, USGS Reston, VA. Stilbite is also a member of the heulandite group. 40 kV - 30 mA, 6.5-9.5 keV File: stilbite.out, -.mdi References: JCPDS #24-894 Found: Stilbite Comment: Very well crystallized phase. Expected to observe the (-201) reflection, but did not. Did observe some unexpected peak splitting not shown in the JCPDS listing. JCPDS listing does not exceed 35.8 degrees 2 theta for CuK alpha, so any additional phase having reflections only above 35.8 degrees could not be detected without further work. Stilbite has fibrous habit; this material is granular. J.S. Huebner, J. Pickrell, T. Schaefer, written communication(USGS)

X Units

cm⁻¹

Y Units

Absorbance

Data Points

2,126