Influence of temperature on raman spectra of the FeS2 single crystal with pyrite structure

Source and Enrichment of Toxic Elements in Coal Seams around Mafic Intrusions: Constraints from Pyrites in the Yuandian Coal Mine in Anhui, Eastern China

“…In the Raman spectra analysis, the Eg (322.3-326.2 cm −1 ) and Ag (386.4-396.3 cm −1 ) of pyrites in unaffected coal matched the reported frequency modes of marcasite [54][55][56], and the Eg (343.0-344.2) and Ag (377.4-380.6) of samples from diabase, aureole and cokeite shifted toward higher frequencies relative to the Eg (343) and Ag (377) of pyrite in the published Renishaw database [54][55][56][57][58]. This indicates that Py I may have deposited under relatively low temperatures [57][58][59]. The intensity ratios of Eg to Ag in pyrites increased away from the intrusion-the Eg values increased from 264.1-754.4 in Py II to 699.0-1273.5 in Py IV, whereas the Ag values decreased from 678.9-1243.2 in Py II to 531.0-1099.5 in Py IV.…”

“…The intensity ratios of Eg to Ag in pyrites increased away from the intrusion-the Eg values increased from 264.1-754.4 in Py II to 699.0-1273.5 in Py IV, whereas the Ag values decreased from 678.9-1243.2 in Py II to 531.0-1099.5 in Py IV. This indicates that the formation temperatures and pressures of Py II were higher than those of Py IV [56][57][58][59], as the intensity of Eg is negatively correlated with pressure, whereas the intensity of Ag is positively correlated with temperature [56][57][58][59]. Therefore, the pyrites enclosed in pyroxene and plagioclase (in diabase) have likely high formation temperatures [53][54][55], whilst the pyrites in the cokeite have likely low formation temperatures [53][54][55][56][57][58].…”

Normative Generics and Norm Breaching – A Questionnaire-Based Study of Parent-Child Interactions in English

“…4 An in-depth discussion of normative expressions is beyond the scope of the paper. 5 Note that normative generics lack any explicit evaluative terms such as should or ought (Hesni, 2019).…”

“…6 But see also Hesni (2019) for a metalinguistic theory of normative indefinite singulars. 7 The number of situations was limited to 8 in order to avoid survey fatigue and to increase the survey completion rate.…”

“…Thus, on the one hand, normative generics explicitly communicate one thing ('boys do not cry') but on the other, they implicitly communicate another ('boys should refrain from crying'). We can distinguish several dimensions of normative generics: (1) they have a normative or hortatory force, (2) they endorse norms and (3) they are assigned different truth conditions than descriptive generics (for a discussion of these, see Hesni, 2019). There are two competing theoretical models of normative generics proposed by Cohen (2001) and Leslie (2015).…”