Journal of Spectroscopy and Molecular Sciences Journal Homepage: https://dergipark.org.tr/tr/pub/jsms Journal of Spectroscopy and Molecular Sciences 4(1) 2022 163‒170 Received 13 December 2021, Accepted 31 May 2022, Available online 21 June 2022. A short review on enstatite and pyroxene in L6 chondrites studied by Raman Spectroscopy Ceren Kamil 1,* , Ozan Unsalan 2 1 Department of Material Science and Engineering, Faculty of Engineering, Ege University, Izmir, Turkey 2 Department of Physics, Faculty of Science, Ege University, Izmir, Turkey *Correspondence: cerenkamil697@gmail.com (Ceren Kamil) ORCIDs Ceren Kamil: https://orcid.org/0000-0002-7311-9550 Ozan Unsalan: https://orcid.org/0000-0001-5736-7530 Abstract: In this study, Raman spectroscopy analyses obtained from previously published studies on Bursa, Çanakkale, Kamargaon, Château-Renard, Sixiangkou, Braunschweig and Suizhou L6 chondrites were compared. These examples were selected for the presence of enstatite (Mg2Si2O6 or MgSiO3) and pyroxene to give a brief overview. The aim of this preliminary study is to determine the presence of silicate minerals, which are abundant in the content of L6 chondrites, and to create a future database by collecting the published spectra of silicate minerals. Keywords: Raman spectroscopy; L6 chondrites; Enstatite; Pyroxene. 1. Introduction Meteor fragments that fell on the Earth after survival of atmospheric entry are called meteorites. Mineralogical studies of meteorites provide detailed information about stellar formation, evolution, and the early geologic history of their source bodies. Chondrites are the most abundant type of stony meteorites, and any further data on their chemistry is crucial to understand parent body or asteroidal processes (Norton and Chitwood, 2008). The largest group of chondrites are the ordinary chondrites about 80% of all known meteorite species and more than 90% of chondrites belong to this group. Ordinary chondrites are divided into three different types according to their chemical content and the ratio of metallic iron (Fe 0 ) to oxidized iron (FeO), H (with high Fe content), L (with low Fe content) and LL (with very low metallic Fe content). (Keil and Fredriksson, 1964; Van Schmus and Wood, 1967; Vernazza et al., 2015; Saikia et al., 2017, 2018; Unsalan and Altunayar-Unsalan, 2020). Mineralogical examination of L6 chondrites gives information about the possible parent body and thermal history of L chondrites. For this reason, it is important to examine in detail silicate minerals such as enstatite, orthopyroxene, clinoenstatite and pyroxene. More than half of L chondrites, which are rich in silicate minerals such as pyroxene, clinoenstatite, orthopyroxene and olivine are petrologic type 6 and L6 chondrites have been reported that they undergone high degrees of thermal metamorphism. Thermal metamorphism continues increasingly from type 4 to 6. The onset melting temperature of ordinary chondrites of type 4-6, such as L6 stony meteorites, were suggested to be ~950 °C. This temperature is an upper limit defined for ordinary chondrites of type 4-6 (Dodd, 1981; Norton and Chitwood, 2008). Other