Hematite

Spectrum Details

Modality

FTIR

Category

mineral

Material Type

Oxide

Sample ID

GDS69.a, GDS69.b, GDS69.c, GDS69.d, GDS69.e, GDS69.f, GDS69.g

Collection Locality

Republic, Michigan

Spectral Purity

1b2b3b4b # Hematite GDS69.a # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1b2b3b4b # Hematite GDS69.b # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1b2b3b4_ # Hematite GDS69.c # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1b2b3b4b # Hematite GDS69.d # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1b2b3b4b # Hematite GDS69.e # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1b2b3b4b # Hematite GDS69.f # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1b2d3c4c # Hematite GDS69.g # 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

Dimorphous with Maghemite. This sample was wet sieved to the following grain size intervals for a study on grain size effects by Roger Clark. The sample was a single rock of specular hematite that appeared pure. Grain size fractions are indicated by the extension after the sample number: .a = 150-250 microns .b = 104-150 microns .c = 60-104 microns .d = 30-45 microns .e = 20-30 microns .f = 10-20 microns .g = less than 10 microns IMAGE_OF_SAMPLE:

XRD Analysis

Comments: Using the quartz (101) and the anomalously intense (211) reflections as an internal standard for 2 theta, eleven hematite reflections were refined to obtain the cell dimensions a=5.035(1) and b0=13.750(4). Within the limits of error given above (1 sigma), these dimensions are those of pure Fe2O3 (see PDF2 33-0664).

X Units

cm⁻¹

Y Units

Absorbance

Data Points

1,801