Amphibole

Spectrum Details

Modality

NIR

Category

mineral

Material Type

Inosilicate

Sample ID

NMNH78662

Collection Locality

Canada

Spectral Purity

1b2b3b4b # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns

Composition / XRD

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

Sample Description

Sample is 0-74µm sieve interval, pale green in color. IMAGE_OF_SAMPLE: NO PHOTO

XRD Analysis

Analysis by N. Vergo indicates it is an amphibole and it looks pure. She suggests either Na-Edenite or Mg-Hastingsite. 40 kV - 30 mA, 7.0-9.5 keV File: amphnmnh.out, -.mdi References: Borg and Smith (1969); Huebner's reference patterns Found: Calcic clinoamphibole (tremolite-actinolite series), trace chlorite? Comment: The chlorite suggestion base only on a peak at 7.1 Angstroms. The amphibole reflections are very sharp, suggesting good crystallinity and compositional heterogeneity. J.S. Huebner, J. Pickrell, T. Schaefer, written communication(USGS)

X Units

cm⁻¹

Y Units

Absorbance

Data Points

2,126