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Section: 6 Minerals and pigments (MP) Page: 90

 Copyright © 1993-2024 Infrared and Raman Users Group (IRUG)


Details

IRUG filename:
IMP00090
Data type:
Infrared
IRUG material class:
Minerals and pigments (MP)
Sample type:
Reference material
Common name(s):
Egyptian blue, Pigment Blue 31 (PB31), CI77437
Chemical/botanical name(s):
Calcium copper silicate
CAS name:
Silicic acid (H2Si2O5)​, calcium copper(2+) salt (2:1:1), C.I. Pigment Blue 31
Sample source 1:
Freer Art Gallery, Tom Chase
Source location 1:
Washington, DC, US
Sample source 2:
Philadelphia Museum of Art
Source location 2:
Scientific Laboratory, Box 7646, Philadelphia, PA, 19101, US
Sample identifier 2:
PMA K-56
Color:
Blue
Age:
1966, dated, 28 yrs, at least
Application:
MFTIR (Fourier transform infrared microspectroscopy)
Mode:
Tran
Cross reference to additional spectra:
Chase, W.T. "Egyptian Blue as a Pigment and Ceramic Material." Science and Archaeology. Ed. Robert H. Brill. Cambridge, MA: MIT, 1971. 80-90.
Originating institution name:
Philadelphia Museum of Art
Originating institution acronym:
PMA
Molecular formula:
Ca Cu Si4 O10
Linear formula:
CaO*CuO*4SiO2
CAS registry no:
10279-60-4 (Egyptian blue), 945558-75-8 (PB31)