Clinochlore Fe

Spectrum Details

Modality

FTIR

Category

mineral

Material Type

Phyllosilicate

Sample ID

GDS157, GDS157.b

Collection Locality

Flagstaff Hill, California

Spectral Purity

1a2a3a4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns

Composition / XRD

# XRF

Sample Description

This sample is described in: Post, J.L. and C.C. Plummer, 1972, The chlorite series of Flagstaff Hill area, California: A preliminary investigation. Clays and Clay Minerals, v.20, pp271-283. Jim Post, 1993, written communication. The sample GDS157.b is formerly sample GDS307 and was ground and sieved from sample GDS157. GDS157.b is a sieved sample with sieve interval 75 to 150 microns. IMAGE_OF_SAMPLE:

XRD Analysis

40 kV - 30 mA, 6.5-9.5 keV, smear mount (ripidolt.out); 45 kV - 35 mA, 7.3- 9.5 keV, random mount (ripidlt2.out) References: Bailey (1988), Huebner's reference patterns Found: Chlorite, type IIb, one weak but distinct reflection at 9.7 Angstroms (mica?), and one very weak reflection at 7.7 Angstroms. Sought but not found: quartz Comments: Many sharp reflections indicate very good crystallinity. Ripidlt2 is one of the best chlorite patterns I have ever seen. The chemical analysis places this chlorite in the composition range once called ripidolite. Note that the unidentified reflection at 7.7 Angstroms is also present in clinochlore GDS158." J.S. Huebner, J. Pickrell, and J. Randow, 1993, written communication.

X Units

cm⁻¹

Y Units

Absorbance

Data Points

1,801