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Section: 6 Minerals and pigments (MP) Page: 525

 Copyright © 1993-2025 Infrared and Raman Users Group (IRUG)


Details

IRUG filename:
IMP00525
Data type:
Infrared
IRUG material class:
Minerals and pigments (MP)
Sample type:
Reference material
Common name(s):
Zinc iron chromite brown spinel, Pigment Brown 33 (PBr33), CI77503
Trade name(s):
Zinc Iron Chromite Brown Spinel (PBr33)
CAS name:
C.I. Pigment Brown 33
Sample source 1:
Ferro Corporation
Source location 1:
Cleveland, OH, US
Sample identifier 1:
Zinc Iron Chromite Brown Spinel (PBr33)
Sample source 2:
Washington State Patrol, Washington State Crime Laboratory
Source location 2:
2203 Airport Way South, Seattle, WA, 98104, US
Sample identifier 2:
Zinc iron chromite brown spinel ([Zn,Fe] [Fe,Cr]204)]
Color:
Brown - reddish brown
Application:
Transmission FTIR spectroscopy
Mode:
Tran
Literature Reference:
Suzuki, Edward M. “Infrared Spectra of U.S. Automobile Original Topcoats (1974-1989): II. Identification of Some Topcoat Inorganic Pigments Using an Extended Range (4000-220 cm-1) Fourier Transform Spectrometer.” Journal of Forensic Sciences, vol. 41, no. 3, 1996, pp.393-406.
Originating institution name:
Washington State Patrol, Crime Laboratory Division
Originating institution acronym:
WSP
Linear formula:
[Zn,Fe] [Fe,Cr]204
CAS registry no:
68186-88-9
Other analytical methods:
XRF (x-ray fluorescence)