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(contaminate) on Martian meteorite Los Angeles
||Red spots observed on the flat
sawn surface of B side of the rock chip have a characteristic Raman
spectrum of organic material (Fig. 3). The major peaks near 1361, 1490,
1556, and 1603 cm-1 match the characteristic I, II, III, and IV peaks of
metalloporphyrin compounds . The strong intensity of I, II, and IV
peaks could arise from resonance Raman enhancement common in
metalloporphyrins excited with a blue-green laser line. We also find a
greater likelihood of detecting hematite in grains near red spots.
Reference: Wang A., Kuebler, K.E., Freeman J., Jolliff B. L.,
Preliminary Raman spectroscopic survey on a martian meteorite – Los Angeles,
32th LPSC, 2001.
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