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The titanium content of pyrope garnet can be quantified using the intensity of a Raman band at about 830 cm−1 that is normalized to the 363 cm−1 band using a spectrometer‐specific calibration using 10 to 15 chromian pyropes from Bohemia, Czech Republic. An accuracy of 0.025 wt% could be achieved for TiO2 contents between 0.17 and 0.67 wt% TiO2 with a Raman spectrometer with a spectral resolution of...
Organic‐walled microfossils of uncertain origin, classified to an informal group named acritarchs, are most commonly interpreted as the resting cysts of marine eukaryotic phytoplankton. Some acritarchs have recently been interpreted as vegetative cells of chlorococcalean green algae, based on internal bodies that have been interpreted as their asexual reproductive structures (spores). To verify this...
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