## 3 Results and Discussion
The Raman spectra corresponding to the biomorphs synthesized under the current atmospheric conditions showed bands at 95, 138, 53, 691, 1059, and 2907 cm\({}^{-1}\) (Figure 5b, Table 1), which were similar to the bands observed in the biomorphs synthesized under the atmospheric conditions that emulated the Precambrian period, for which bands were recorded at 95, 138, 155, 224, 691, and 1509 cm\({}^{-1}\) (Figure 6b, Table 1). These vibrations were attributed to the presence of BaCO\({}_{3}\) in whithering form in both samples. This crystalline polymorph coincides with the bands characteristic of those reported in previous works, where reticular vibration bands were found at 136, 155, 180, and 225 cm\({}^{-1}\) and internal vibration ones were shown at 691 and 1059 cm\({}^{-1}\). To corroborate whether it is the whithering, the FTIR spectra of the aforementioned samples were characterized and the corresponding vibration bands of the elements that made up the biomorphs were observed. Therefore, in the FTIR spectra, the peaks that are characteristic of the CO\({}_{3}\)\({}^{2-}\) groups can be identified. It is important to mention that, for the case of the FTIR spectrum corresponding to the biomorph samples obtained under the current atmospheric conditions, the band n\({}^{3}\)-CO\({}_{3}\)\({}^{2-}\) at 1426.1 cm\({}^{-1}\) and the band n\({}^{1}\)-CO\({}_{3}\)\({}^{2-}\) at 1023.3 cm\({}^{-1}\) were both observed. In the case of the FTIR spectrum obtained for the biomorphs synthesized under the conditions that emulated the Precambrian period, analog vibration bands were observed for the biomorphs obtained at the environmental temperature. Therefore, in the spectra, the n\({}^{3}\)-CO\({}_{3}\)\({}^{2-}\) band at 1432.3 cm\({}^{-1}\), the n\({}^{1}\)-CO\({}_{3}\)\({}^{2-}\) band at 1058.7 cm\({}^{-1}\), and the n\({}^{2}\)-CO\({}_{3}\)\({}^{2-}\) band at 856.0 cm\({}^{-1}\) can be observed. The signals present on the FTIR spectra of the reported whithering were compared, where the bands were attributed to the BaCO\({}_{3}\) polymorph [42]. Additionally, in the diffractograms of the barium biomorphs, the main peaks of a phase comprising a whithering structure with a BaCO\({}_{3}\) composition were observed. These results confirm the chemical composition and crystalline structure of the obtained biomorphs. The identification of BaCO\({}_{3}\) biomorphs presenting the whithering polymorph, as was identified under other synthesis conditions [22; 23; 33], is relevant because, as has been mentioned, Ba\({}^{2+}\) has been identified in some organisms of our present time, such as algae, invertebrates, and fish [71]. This allows us to infer that in the primeval era of our planet, barium was present in the form of barite in the Earth's crust [72] and formed part of various forms of primitive life since it seems that, independent of the mineral or substrate within which it is found, it is capable of carrying out chemical reactions with the elements present in diverse atmospheric and environmental conditions. In addition,the barium silica-carbonate biomorphs, as well as the calcium silica-carbonate biomorphs, obtained on obsidian show (as we have already mentioned) that minerals and perhaps some igneous rocks had a prominent role in the rise of the first forms of life on Earth, currently forming part of the hard and rigid structures of various organisms, through a process called biomineralization [73; 74; 75; 76; 77; 78; 79; 80; 81; 82]. This mechanism of biomineralization is carried out in the organisms of practically all five kingdoms (animalia, plantae, fungi, protista, and monera). Figure 5: Identification via Raman spectroscopy (**b**), IR (**c**), and PXRD (**d**) of the barium silica–carbonate biomorphs synthesized under current atmospheric conditions. (**a**): (**i**) SEM micrograph; (**ii**) optical image obtained with the Raman microscope; (**iii**) Raman map (1509 cm\({}^{-1}\)).